The International Whaling has proposed a negative kill limit for bluefin tuna as well as a countrywide ban on commercial whaling.
Why do humans value blue whales?
Although blue whales have a huge food requirement, the ocean environment benefits from them rather than is burdened by them. Their iron-rich excrement is a crucial supply of nutrients for the marine food web, boosting production in the Southern Ocean and increasing fisheries yields.
How do whales protect the environment?
The "whale pump"—the way whales graze, poop, migratory, then dive between the ocean's top and depths—moves vital nutrients around the ocean. Thus, robust water bodies and the development of cyanobacteria are supported, which in turn helps lock in a significant quantity of carbon.
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Which one of the following has the cellular components arranged in order of increasing size?
A) Amino acid < protein < mitochondrion < ribosome
B) Amino acid < protein < ribosome < mitochondrion
C) Amino acid < ribosome < protein < mitochondrion
D) Protein < amino acid < mitochondrion < ribosome
E) Protein < ribosome < mitochondrion < amino acid
The order of the cellular components of a cell is amino acid, protein, ribosome, and mitochondrion, in that order.
How is the correct sequence of amino acids supplied to match the codon in the mRNA?When the mRNA's codons come into contact with the ribosome's active site, the nucleotide sequence of the mRNA is translated into an amino acid sequence, with the aid of the tRNAs acting as adaptors to add each amino acid in the proper sequence to the end of the expanding polypeptide chain.
What is the typical arrangement of essential amino acids?It's crucial to remember that proteins usually never include any amino acids other than those with the l-configuration.
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Which leukocyte might you expect to find in higher quantities in a person experiencing allergies?
O neutrophil
O lymphocyte
O basophil
O eosinophil
Eosinophil finds in higher quantities in a person experiencing allergies.
A greater than usual level of eosinophils is called eosinophilia (e-o-sin-o-FILL-e-uh). White blood cells that combat sickness include eosinophils.
Most frequently, this condition is a sign of malignancy, an allergic reaction, or a parasite infection. Eosinophil levels might be high in tissues around an infection or inflammatory site or in your blood (blood eosinophilia) (tissue eosinophilia).
In samples obtained during an exploratory technique or in samples of some fluids, such as mucus expelled from nasal tissues, tissue eosinophilia may be discovered. Your bloodstream's eosinophil count is probably normal if you have tissue eosinophilia.
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One might find basophils in higher quantities in a person experiencing allergies, which means option C is the right answer.
White blood cells are the colorless particles present in Hemoglobin which fight against the foreign particles to prevent the person from diseases and infections. Allergy is any form of inflammation or abrupt change in body due to which some abnormal symptoms are felt. For example: rashes, nausea, sneezing etc. are some allergic symptoms. When body gets into contact with some other foreign particles, WBC release basophils which fight against these particles. Mast cells are the main players in the early phase of the allergic reaction. Neutrophils and eosinophils also increase in certain cases in allergic reactions.
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PLS I NEED HELPPPP. create a food chain. choose the biotic factors from the list and move them onto the hotspots marked with circles.
Answer:
the insects will eat the leaves, the minnows will eat the insects,the trout will eat the minnows and the herons will eat the trout
Pretest: Unit 1
The model shows an error that can occur during DNA replication.
Template DNA strand
DNA during replication TCT GGT
↓
Resulting DNA strand TCTGGT
Which type of replication error does it represent?
OA. Substitution
B. Inversion
C. Deletion
AGA CA GATTC
D. Insertion
C
PREVIOUS
CTAAG
CTAAG
Inversion of DNA strands is the replication mistake that is most likely to occur in the resultant DNA strand.
What does DNA replication inversion entail?Inversions. When a chromosome splits in two, the resultant fragment of DNA is reversed and reinserted into the chromosome, causing an inversion. The chromosomal breaks may or may not result in the loss of genetic material.
What impact does DNA inversion have?Meiosis structural issues can result from inversions, such as certain pericentric inversions. A breakpoint can also change the expression of a gene or stop an open reading frame. The results might be harmful.
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The process of evaporation is involved in the operation of cooling systems to remove heat energy. a. true b. false
Answer: true
Explanation: because evaporation causes cooling because the process requires heat energy.
choose the best answer(s) from the list below. the glucose alanine cycle involves: 1- the transfer of the amino group from alanine to glutamate to form glutamine in the liver. 2- the transport of pyruvate from muscle to liver in the form of alanine. 3- the transport of nh4 from muscle to liver in the form of alanine.
the glucose alanine cycle involves the glucose alanine cycle involves the transfer of the amino group from alanine to glutamate to form glutamine in the liver
The glucose-alanine cycle, also known as the Cahill cycle or the alanine cycle in the literature, entails the breakdown of muscle protein to produce more glucose and produce more ATP for muscular contraction. It enables the transportation of pyruvate and glutamate from muscle tissue to the liver, where gluconeogenesis occurs to provide the muscle tissue with extra glucose, as was previously explained. Muscle and other tissues that metabolise amino acids for energy produce amino groups through the transamination process, most frequently in the form of glutamate, to start the cycle. Alanine and alpha-ketoglutarate are created when these amino groups are transferred by the enzyme alanine aminotransferase to the glycolysis byproduct pyruvate. Alanine then travels through the bloodstream to the liver, where alanine aminotransferase earlier catalysed a process. Blood carries alanine from peripheral tissues to the liver where it is converted to glucose and urea. Peripheral tissues, particularly skeletal muscle, receive glucose for conversion to alanine by a process that combines glycolysis and transamination of pyruvate with glutamate.
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The glucose-alanine cycle involves transferring an amino group from alanine to glutamate to form glutamine in the liver.
The glucose-alanine cycle, also known in the literature as the Cahill cycle or the alanine cycle, involves the breakdown of muscle protein, producing more glucose and producing more ATP for muscle contraction. As previously explained, it enables the transport of pyruvate and glutamate to the liver where gluconeogenesis takes place to supply excess glucose from muscle tissue. Muscle and other tissues that convert amino acids into energy It undergoes a transamination process to produce an amino group, most commonly in the form of glutamic acid, which initiates the cycle. It is formed when it is transferred to an acid. Alanine then traveled through the bloodstream to the liver, where alanine aminotransferase catalyzed the process. Blood transports alanine from peripheral tissues to the liver where it is converted to glucose and urea. Peripheral tissues, especially skeletal muscle, obtain glucose for conversion to alanine by a process that combines glycolysis and transamination of pyruvate with glutamate.
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An individual that has two different alleles of a particular gene is said to be A. dihybrid. B. heterozygous. C. recessive. D. hemizygous. E. homozygous
Heterozygous refers to a person who possesses two distinct alleles of a given gene. The right response in this case is option B.
Heterozygous refers to a person who possesses two distinct alleles of a given gene. When a person is heterozygous, it implies they have two distinct copies of the same gene, one from each parent.
This is in contrast to homozygous, where an individual has two identical copies of a gene, and both copies were inherited from one parent. Dihybrid refers to an organism that inherits two pairs of different alleles for a trait. recessive and hemizygous are not related to the scenario described.
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LIMITED TIME, HELP PLEASE URGENT!!!!!!!
According to the biological species concept, what defines a species?
Select one:
The amount of physical similarities that a group of organisms have
in common
Whether two organisms can interbreed and produce healthy, fertile offspring
The number of similarities two organisms have in their DNA
Whether the fossil record shows a similar lineage of ancestry between organisms
Answer:
the amount of physics similarity that a group of organisms have in common5. Use a graphic organizer to explain the roles
that absorption, radiation, conduction, and
convection play in warming the atmosphere.
Absorption is required for the biosphere to absorb solar radiation, while conduction and convection also play to warming the atmosphere due to the spread process of heat across the whole ecosystem.
What are the processes of radiation, absorption and convection?Absorption is the process by which energy is taken up by a material, typically through electromagnetic radiation that is converted into heat, a form of energy that can be used to power chemical reactions, while convection is the transfer of heat through a fluid, such
Therefore, with this data, we can see that convection, radiation and absorption are closely related to global warming.
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20 POINTS
A scientist sets up an experiment to test which fertilizer has the best effect on increasing fruit size in a single variety of avocado trees. They grow one group of avocado trees using Fertilizer-A, one group using Fertilizer-B, one group using Fertilizer-C, and one group grown without any fertilizer.
All the avocado trees are given the same amount of water and sunlight, and they are all grown during the same period of time.
Which of the following is the independent variable in this experiment?
Question 2 options:
The type of fertilizer used
The size of the avocados
The amount of water, sunlight, and time
The amount of water only
Answer:
The type of fertilizer used
Explanation:
Answer:
The independent variable in this experiment is the type of fertilizer used.
An independent variable is a factor that is manipulated or changed by the experimenter to test its effect on a dependent variable. In this experiment, the scientist is comparing the effect of different fertilizers (Fertilizer-A, Fertilizer-B, Fertilizer-C) on the size of the avocados. Therefore, the type of fertilizer used is the independent variable.
Explanation:
HELP !!!!!!!!LIMITED TIME!!!!!!!!!!!!!!!
Two closely-related insect species are being discovered. Scientists
are focusing on how long it takes each to develop limb buds
following fertilization. What evidence of evolution is this an example
of?
Select one:
Embryological
DNA
Anatomical
Molecular
Answer:
Embryological
Explanation:
-Which of the following is true about the human population? Group of answer choices: -The number of people on the planet is expected to go down in the next two decadesumber of people on the planet is expected to go down in the next two decades. -It has taken less and less time to grow the population by 1 billion people since the 1800s -The number of people on the planet has increased at a steady rate since the 1800s.
-The human population is expected to stay the same.
Since the 1800s, it has taken less and less time for the human population to increase by 1 billion people.
In terms of population, which of the following is accurate?People are a dynamic phenomena. A population's size, distribution, and makeup are always changing because population density is largely influenced by variables including immigration, birthrate, mortalityrate, and literacy rate. A significant barrier for a developing economy like India is the excessive population burden.
What exactly is a human population?The amount of people in a certain location is referred to as the "human population." The term "human population" simply refers to the total population of a region, which can be anything from a small town to the entire planet.
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Which best describes the flow of genetic information?
The flow of genetic information is from DNA to RNA to proteins, in a process known as the Central Dogma.
What is the Central Dogma?
The Central Dogma is a scientific theory that explains the flow of genetic information in biological systems. It states that genetic information flows from DNA to RNA to proteins. DNA is transcribed into mRNA, which is then translated into proteins. This process is essential for the production of proteins and other molecules that are needed for the functioning of the cell.
DNA is transcribed into mRNA, which is then translated into proteins. Proteins are the end products of this genetic information flow and are responsible for carrying out the functions of the cell.
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Which of the following mutations would you expect to have the greatest effect on a living cell?
A)A mutation that changes a single base in a region of noncoding DNA
B)A mutation that changes the third letter of one of the three-base "words" in a particular gene
C)A mutation that deletes one base in the middle of a gene
C) A mutation that deletes one base in the middle of a gene would likely have the greatest effect on a living cell. This type of mutation can disrupt the reading frame of the gene, potentially altering the amino acid sequence of the protein it codes for and altering its function.
A mutation in a non-coding region of DNA would not have as much of an impact on a living cell as it would not affect the production of a protein. A mutation that changes one base in a codon would also have an effect, but it could be less severe than a frameshift mutation.
A gene is a specific sequence of DNA that codes for a specific protein. Proteins are important molecules that carry out various functions in the cell, such as catalyzing reactions, replicating DNA, responding to stimuli, and transporting molecules across cell membranes. The sequence of a gene is read in groups of three bases, called codons, which code for specific amino acids that are used to build the protein.
A mutation is a change in the DNA sequence that can occur spontaneously or be induced by environmental factors. Some mutations have no effect on the function of the protein, while others can alter its structure and function.
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Experiments should:
be consistent and free from blas.
never be repeated.
All of these choices are correct.
change each time they're performed.
Experiments should be consistent, free from bias, and change each time they're performed.
What do you mean by Experiments?
Experiments are a type of empirical study in which a researcher intentionally manipulates one or more variables to observe the effect on another variable. Experiments are commonly used in the sciences, such as physics, chemistry, biology, and psychology, to test theories and explain phenomena.
If the experiment is not consistent, then the results could be skewed or unreliable. Free from bias means that the experiment should be conducted as objectively as possible, without any personal preferences or opinions influencing the results. This ensures that the results are accurate and not affected by any outside influences. Finally, experiments should be changed each time they are performed in order to ensure the validity of the results. Changing the experiment allows for different variables to be tested, which can lead to more accurate results.
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The invention of the microscope led to the discovery of the cell by Robert Hooke. While looking at cork, Hooke observed the box-shaped
xstructures, which he called "cells" because they reminded him of the cells (rooms) found in monasteries. This discovery led to the
development of the cell theory. Credit for developing the cell theory is usually given to two scientists: Theodor Schwann and Matthias
Schleiden. The cell theory was then proposed by Theodor Schwann in 1839. There are three parts to this theory.
Examine each of the statements below. Which of these is part of the cell theory? Select ALL that apply.
4x A The cell is the basic unit of life.
x
x
x
B DNA is passed between cells during cell division
C
D
4x E
Energy flow occurs within cells.
All cells arise only from pre-existing cells.
All living things are made of cells. No
Energy moves through cells. As a result, E is the right response.
How do cells get made?The cell cycle is the process through which new cells are generated from pre-existing cells. One cell is capable of self-replication, giving rise to two additional daughter cells. Every cell cycle requires the completion of two main tasks. Cells must first duplicate their DNA exactly.
What makes it called a cell?After examining a piece of cork under a very early microscope, Robert Hooke proposed the name "cell" in 1665, derived from the Latin cella, which means "storeroom or chamber." Furthermore, it is reported that he compared the rectangular spaces to some monastic cells.
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Distinguish between abiotic and biotic factors. Give examples of each
The drastic decline in the number of Kirkland's warblers, prompting the U. S. Forest Service to include the Kirtland’s warbler on the list of endangered species in 1967 under the Endangered Species Preservation Act of 1966 was due to
Responses
A eggshell thinning due to DDT use.eggshell thinning due to DDT use.
B habitat loss as young Jack pine forests matured.habitat loss as young Jack pine forests matured.
C competition for food among the other northern bird species.competition for food among the other northern bird species.
D the increase in wildfires that destroyed the developing Jack pine forests.
Answer: D
Explanation:
The main reason behind the drastic decline is an increase in wildfires that destroyed the developing Jack pine forests. Therefore, option "D" is correct.
What are endangered species?The meaning of the word endangered is anything is on the verge of extinction. The organism, plants, and animals which at the verge of extinction are known as the endangered species. The major reasons behind the extinction are loss of habitat, loss of genetic variation, and natural selection.
The process is rapid. Examples of animals that are on the list of extinction are pandas, snow leopards, tigers, amur leopards, black-footed ferrets, blue whales, turtles, red pandas, and black rhinoceros.
Therefore, human beings should make efforts to conserve the animals.
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Basically this question is asking you to identify the source of the energies listed.
Erosion by water energy source is the the sun.
melting of rock energy source is inside earth
weathering by wind energy source is the sun
weathering by water energy source is the sun
heat and pressure energy source is the sun
flow of magma energy source is inside earth
What are energy sources?
Energy sources are described as forms of potential energy that can be used to perform work.
Primary energy sources take many forms, including nuclear energy, fossil energy -- like oil, coal and natural gas and renewable sources like wind, solar and so much more.
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The bacterium E. coli requires simple organic molecules for growth and energy-it is
therefore a:
A. photoautotroph
B. chemoheterotroph
C. chemoautotroph
D. photoheterotroph.
E. lithotroph
The bacterium E. coli requires simple organic molecules for growth and energy it is therefore a chemoheterotroph. Here option B is the correct answer.
The bacterium E. coli is a chemoheterotroph, which means that it obtains energy from the oxidation of organic molecules and requires an external source of carbon for growth. E. coli can use a wide variety of simple organic molecules as a source of energy and carbon, including sugars, amino acids, and fatty acids.
A photoautotroph is an organism that uses light energy to produce its own food and doesn't require an external source of carbon. A chemoautotroph is an organism that produces its own food using inorganic compounds as a source of energy and carbon.
A photoheterotroph is an organism that uses light energy to obtain energy, but it still needs organic compounds as a source of carbon. A lithotroph is an organism that uses inorganic compounds as a source of energy and carbon.
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4. Plan an experiment that neurobiologists could use to show that an action potential travels faster along a myelinated axon than along a nonmyelinated axon.
An experiment that neurobiologists could use to show that an action potential travels faster along a myelinated axon than along a nonmyelinated axon is given below
Obtain two groups of neurons, one group with myelinated axons and another group with nonmyelinated axons.Stimulate the neurons in both groups with a electrical current of the same intensity and duration.Measure the time it takes for the action potential to travel the length of the axon in both groups.Compare the results and observe the difference in the time it takes for the action potential to travel the length of the axon in the myelinated group compared to the nonmyelinated group.What is the above experiment about?This experiment could be repeated multiple times with different intensity and duration of the electrical current, with different groups of neurons or with different kind of myelination.
Before conducting the experiment, it is important to ensure that the axons in both groups are of similar length, diameter, and overall health. This can be done by measuring the length and diameter of the axons under a microscope and by testing the neurons for any signs of damage or degeneration.
Therefore, The results would show that an action potential travels faster along a myelinated axon than along a nonmyelinated axon.
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A scientist sets up an experiment to test which fertilizer has the best effect on increasing fruit size in a single variety of avocado trees. They grow one group of avocado trees using Fertilizer-A, one group using Fertilizer-B, one group using Fertilizer-C, and one group grown without any fertilizer.
All the avocado trees are given the same amount of water and sunlight, and they are all grown during the same period of time.
Which of the following is the independent variable in this experiment?
The type of fertilizer used
The size of the avocados
The amount of water, sunlight, and time
The amount of water only
An independent variable in this experimental study is the type of fertilizer used for the growth of avocado. Thus, the correct option is A.
What are Variables?A variable is anything which can change on its own or can be changed. In other words, a variable is any factor which can be manipulated, controlled, or measured in an experimental study.
An experimental inquiry typically has three main types of variables which includes an independent variable, a dependent variable, and a controlled variable.
In the study, where all the factors are kept constant and same for the growth of avocado trees. The independent variable is the type of fertilizer used in the experiment.
Therefore, the correct option is A.
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LIMITED TIME, HELP PLEASE URGENT!!!!!!!
The climate shifts in an ecosystem, causing the rainy seasons to
become shorter and water to become more scarce overall. What is
the most likely outcome of this environmental change?
Select one:
No change in the equilibrium of each population
All populations will increase in size.
Some populations will expand while others decline.
All populations will decline in size.
Answer:
all populations will decline in sizeExplanation:
because of the scarce of water
animals will have to look for another home
hope this was helpful
Proteins use the process of active transport to move substances by: decreasing the water content in cells to get rid of excess acid or base levels accumulating hydrogen ions within the cell to attract the substances opening passages in the membrane and escorting substances into and out of the cell sending antibodies t0 cells to carry excess proteins out to where they are needed attaching themselves to minerals to carry them throughout the bloodstream
Proteins use the active transport method to transfer things by opening membrane passageways and leading them through the cell.
In what kind of active transport protein do you use?Instead of channel proteins, carrier proteins are used in active transport. Since these carrier proteins require ATP to change shape, they differ from those seen in facilitated diffusion.
How can protein assist in active transport?Specialized carrier proteins are needed for active transport, and cellular energy must be used. When a chemical is impermeable to the phospholipid bilayer of the membrane or when there is a concentration differential across the membrane, carrier proteins allow the chemical to pass.
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During photosynthesis,_______chemical energy.
energy is changed to
how do water molecules stick together
An animal cell has just completed telophase. Which of the following would you expect to see?
a. an empty cell
b. chromosomes clustered at the poles
c. individual chromatids separating
d. formation of vesicles at the metaphase plate
e. formation of two genetically identical cell
An animal cell has just completed telophase. The following would be expected to see: formation of two genetically identical cells.
At telophase, the chromosomes begin to decondense, the spindle breaks, and the nuclear envelope and nucleolus regenerate. The cytoplasm of the mother cell divides to form two daughter cells, each containing the same number and type of chromosomes as the mother cell.
During telophase, the plant cell forms a cell plate that allows the two daughter cells to separate. In animal cells, cells are separated by pinching the cell membrane.
The final stage of mitosis, telophase, is characterized by cytokinesis, reorganization of the nucleus and nuclear envelope, loss of the mitotic spindle apparatus, and unwinding of chromosomes into chromatin.
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which of the following statements correctly describes the role of telomerase in eukaryotic cells?
Telomerase is an enzyme that adds repetitive sequences of DNA, called telomeres, to the ends of chromosomes in eukaryotic cells.
This helps to protect the chromosomes from damage and deterioration during cell division. Telomerase is active in embryonic cells and certain adult stem cells, but is generally not active in most somatic cells. This lack of telomerase activity is believed to contribute to the aging of cells and the development of certain diseases. In contrast, stem cells and certain cancer cells express telomerase and maintain telomere length, allowing them to continue dividing.
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How do transporters and channels select which solutes they help move across the membrane?
Both channels and transporters discriminate between solutes mainly on the basis of size and electric charge.
Channels allow the passage of solutes that are electrically charged; transporters facilitate the passage of molecules that are uncharged.
Channels discriminate between solutes mainly on the basis of size and electric charge; transporters bind their solutes with great specificity in the same way an enzyme binds its substrate.
Channels will allow the passage of any solute as long as it has an electric charge; transporters bind their solutes with great specificity in the same way an enzyme binds its substrate.
Transporters discriminate between solutes mainly on the basis of size and electric charge; channels bind their solutes with great specificity in the same way an enzyme binds its substrate.
Transporters and Channels select which solutes they help move across the membrane by : Channels distinguish between solutes primarily based on size and electric charge; transporters bind their solutes with high specificity, similar to how an enzyme binds its substrate.
Transporters and channels are membrane proteins that mediate the transport of metabolites, water, and ions across biological membranes. Membrane transport proteins are important for maintaining homeostasis and ensuring cell survival intracellularly or during environmental stress.
Channels are membrane-spanning water-filled pores through which substrates passively diffuse along electrochemical gradients when regulatory gates are open. Transporters undergo cycles of conformational changes associated with substrate binding and dissociation on opposite sides of the membrane. Membrane proteins that cause selective permeability are called ion channels, and other proteins called active transporters create and maintain ion gradients. As the name suggests, ion channels have pores that allow certain ions to pass through the nerve cell membrane.
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Processing of & primary mRNA transcript In & eukaryotic cell does not normally Involve: joining of exons attachment of a long poly(A) sequence at the 3' end excision of intervening sequences (introns) attachment of GMP cap at the 5' end
In a eukaryotic cell, processing a primary mRNA transcript does not typically include changing common nucleotides into modified bases like inosine and pseudouridine. So, option B is correct.
The process by which the initial transcript from a gene acquires its mature form is collectively referred to as "RNA processing." During this process, long poly(A) sequence is attached to the 3' end and one or more guanine nucleotides are methylated at the 5' end. Also, introns are removed and exons are joined during RNA splicing.
But the conversion of normal bases to inosine and pseudouridine is not RNA processing. A natural purine nucleoside called inosine is frequently found in the anticodon loop of various tRNAs. It is created through the breakdown of adenosine. By influencing mRNA processing, translation, or stability, they can determine how mRNAs function. The nucleoside uridine has an isomer called pseudouridine. They play a role in mRNA decoding, ribosome assembly, processing, and translation while stabilizing the local structure.
The complete question is -
Processing of a primary mRNA transcript in a eukaryotic cell does NOT normally involve:
A) attachment of a long poly(A) sequence at the 3' end.
B) conversion of normal bases to modified bases, such as inosine and pseudouridine.
C) excision of intervening sequences (introns).
D) joining of exons.
E) methylation of one or more guanine nucleotides at the 5' end.
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