Answer:
The biological process that involves produces two exact copies of DNA from a DNA molecule is called DNA replication.
In this process, the enzyme helicase unzips the DNA double helix by breaking the hydrogen bonds that bind bases together in the structure. Unzipping the hydrogen creates a replication fork. Every strand of the DNA acts as a template but oppositely oriented known as the leading strand in 3’ to 5’ direction and the lagging strand in the 5’ to 3’ direction.
One of the strands is oriented in the 3’ to 5’ direction (towards the replication fork), this is the leading strand. The other strand is oriented in the 5’ to 3’ direction (away from the replication fork), this is the lagging strand. As a result of their different orientations, the two strands are replicated differently.
Primer acts as an initiating site for DNA synthesis and DNA polymerase enzyme adds new complementary nucleotide base by attached and moving on the leading strand in the direction of 5' to 3' which is reversed to the strand.
After the binding and synthesis of all the bases, the enzyme called exonuclease removes the primer from the strand. One new and an old chain of two DNA molecules are synthesized by DNA replication due to the one new and one parent molecule in DNA it is known as semi-conservative.
1. Why are viruses considered nonliving but bacteria are considered living? Give two reasons. (1 point)
Answer:
-Viruses cannot replicate.
-Viruses do not need to consume energy to survive or regulate its own temperature.
Explanation:
<3
Viruses are not able to replicate or carry out any of the functions of living cells on their own. They rely on the machinery of the host cell in order to replicate and produce new viruses, and they are not able to carry out functions such as metabolism, growth, or reproduction on their own.
Why viruses are considered non-living?Viruses are much simpler in structure than bacteria and other living cells. They do not have a true cell structure or any of the characteristic cell organelles found in living cells, such as a nucleus, mitochondria, or endoplasmic reticulum. Instead, they are composed of a small piece of genetic material (either DNA or RNA) surrounded by a protein coat.Learn more about viruses, here:
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Question 6 of 25
Which force helps water molecules stick together?
A. Gravitational pull
B. Tonic bonds
C. Magnetic pull
O D. Hydrogen bonds
Answer:
the answer should be hydrogen bonds. but not sure
What is this chemical structure?
Answer options
A. Nucleotide
B. Amino Acid
C. Phospholipid
D. Nucleoside
Answer:
the answer is a, i believe:)
Explanation:
hope this helps love:))
Imagine two closely related, but separate, species of fish reproduce and the hybrids offspring have higher fitness than either of the parent species. Given enough time, the most likely outcome will be: Group of answer choices The two original species will eventually fuse into a third new species, and disappear. The two original species will remain, and a third new species will appear. Nothing: the two original species will remain, and the hybrids will eventually disappear.
Answer:
The two original species will eventually fuse into a third new species, and disappear.
Explanation:
According to Darwin's theory of evolution, species that are better adapted to their environment have greater chances of surviving long enough to reproduce and pass on these favourable characteristics to their offspring. This is known as 'survival of the fittest'.
The original species lack the resilience of the new hybrid species hence the two original species will eventually disappear and fuse into the third specie.
Which of the following happens when a phosphate-phosphate bond in an ATP molecule
is broken?
Lysosome contents are released in a cell.
Energy is released in a cell.
Water is transported into an animal cell
Light energy is absorbed in a plant cell.
Answer:
An event that occurs when a phosphate-phosphate bond is broken in ATP is that energy is released in a cell.
Explanation:
Adenosine triphosphate or ATP is the molecule in charge of providing energy to the cell, which is necessary to perform its functions.
The energy contained in ATP depends on the high-energy bonds that bind the phosphate groups to the energetic nucleotide molecule. Through the hydrolysis of ATP, phosphate is separated from ATP, obtaining ADP, and a large amount of energy is released. This energy serves for the cell to perform its metabolic functions.
The other options are not correct because:
Lysosomes act on cellular digestion. Transport of water into the cell occurs by osmosis, through aquaporins. Light energy is absorbed in a plant cell, through photosynthesis.Nitrifying bacteria _____.
1) change ammonia into nitrates
2) help animals make protein
3) cause nitrogen oxide pollution
4) release nitrogen into the atmosphere
I think the answer is 1, change ammonia into nitrates.
Answer:
1 and 2
Explanation:
What are two things that characterize the practice of science?
NEED HELP WITH THIS:
List the three components of traditional cell theory.
Answer:
Explanation:
All living things are made up of cells. Cells are the basic units of structure, function and physiology in living things. Living cells can come only from other pre-existing cells. Hope this helps!
Every chemical compound is unique and different from the
A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of
output work?
12,500 J
40,000 J
62,500 J
90,000 J
Answer:
62,500 J
Explanation:
50,000/0.8=62,500
Answer:
62,500
Explanation:
In October 2001 at the site of the World Trade Center in New York City, fires were still burning from the terrorist attacks that had brought down the buildings. The greatest danger to the respiratory system was
Answer:
toxic dust particles
Explanation:
After the World Trade Centre buildings collapsed on September 11, 2001, dust particles resulting from crushed concretes mixed with other substances formed toxic were released into the atmosphere.
And these toxic particles post the greatest danger to the respiratory system of those lacking effective personal respiratory protective equipment.
Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution? Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution? adding nitrifying bacteria to the soil using ammonia instead of nitrate as a fertilizer growing improved crop plants that have nitrogen-fixing enzymes adding denitrifying bacteria to the soil
Answer:
adding denitrifying bacteria to the soil
Explanation:
Denitrifying bacteria refer to microorganisms in soil that carry out the conversion of nitrates in soil to free atmospheric nitrogen.
Nitrogen gas (N2) is ultimately the product of denitrification of soil, however certain intermediate nitrogen species are also formed in the process. Some of these intermediates may include the following sequence of conversion; NO3− → NO2−→ NO + N2O → N2.
The chemical equation for denitrification is; 2 NO3− + 10 e− + 12 H+ → N2 + 6 H2O.
When prokaryotic bacterial cells undergo cell division, the single circular chromosome replicates to form a second chromosome. This new chromosome, like the original, attaches to the plasma membrane. Next, the plasma membrane pinches inward, and a cell wall forms across the middle of the cell to separate the two chromosomes and form two daughter cells. How does cell division in bacteria differ from mitosis in eukaryotes?
Using the DNA molecule. Identify the components labeled A to E.
I. Nitrogenous Base
II. Hydrogen Bonds
III. Phosphate
IV. Sugar (deoxyribose)
V. Nucleotide
Answer:
1. E is Nitrogenous Base
2. C
3. A
4. B
5. d
Please help me with this Venn Diagram!
Answer: Cells : Cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature.
virus : A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
Both : Still, viruses have some important features in common with cell-based life. For instance, they have nucleic acid genomes based on the same genetic code that's used in your cells (and the cells of all living creatures). Also, like cell-based life, viruses have genetic variation and can evolve.
Andre said that all plants grow from seeds but you disagree. Explain how Andre is wrong in 1-2 sentences, and give an
example:
Answer:
I disagree
Explanation:
Because some plants don't grow from seeds like cassava.
Some plants don't bare fruits which contain seeds and use spores for example algae.
neurons are brain cells. where would new neuron come from
A bacteria
B non-living matter
C other cells
D food
Answer:
The answer is C!
Explanation:
who was the 20th. president. think for your help...
Answer:
James A. Garfield
Explanation:
Short and Good To Know Facts
Married Lucretia Garfield
Died by assassination after 6 months of being in office
Vice president was Chester A. Arthur
Pls help I’m stresssingg :(((
Answer:
Noble gases are likely to be least reactive, because they have complete octet in their valence shell.
Halogens are likely to be most reactive, because they want only one electron to complete its octet in their valence shell.
5. Your grandmother in Ireland sends you her favorite cookie recipe. Her instructions say to bake the cookies at 190 °C. To what Fahrenheit temperature would you set the oven to bake the cookies?
Answer:
374 F
Explanation:
How does the structure of a white blood cell affect its function?
Answer:
they fight and kill the bad bacteria in your body to help you stay healthy
Explanation:
The diagram above represents an animal cell. What is the function of X?
It controls energy released.
It regulates the transport of materials.
It produces proteins.
It synthesizes cellulose.
Answer:
X in the diagram represents the cell membrane and performs the function of regulates the transport of materials.
Explanation:
The cell membrane, marked with X in the diagram, is a lipid bilayer with hydrophobic properties, which acts as a semi-permeable membrane to the passage of substances.
This membrane, that covers the cell and keeps it isolated from the extracellular space, has the function of controlling or regulating the passage of materials from the extracellular to the intracellular space, as well as the exit of substances from the interior of the cell. To fulfill this function it has several alternatives of transmembrane transport.
The other options are not correct because:
The cell membrane does not control the energy released. Protein synthesis occurs in the rugged endoplasmic reticulum. Cellulose synthesis occurs inside the cell, a process dependent on photosynthesis.Answer: it regulates the transport of materials
Explanation:
Please list 3 separate facts about the 2 different types of changes in matter:
when placed in the same container, oil and water do not mix because
Oil and water do not mix because mix each other because water is a polar solvent while the molecules of oil are non-polar in nature.
What are the characteristics of water?The characteristics of water are as follows:
It is a universal solvent that is polar in nature. It possesses high heat capacity and heat of vaporization. It has properties like cohesion and adhesion. The solid form of water is less dense as compared to its liquid form.Due to differences in their polarity, the molecules of water and oil are not intermingled with each other. Due to this, the polar compounds are dissolved in a polar solvent while non-polar compounds like oil are dissolved in a non-polar solvent. Thus, the molecules of oil will finally stick to each other and are immiscible with water.
Therefore, oil and water do not mix because mix each other because water is a polar solvent while the molecules of oil are non-polar in nature.
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An acronym to assist in
remembering the 6 major micro-
nutrients is
A. CITES
B. PORK CHOP
C. P-CHOP
D. N-CHOPS
Answer:
C
Explanation:
Photosynthesis has two main parts (light-independent and light dependent). Which descriptions can BEST be used to explain photosystem I and photosystem II?
Answer:
Explanation:
utilizada
al ser
The energy required for photosynthesis is provided by
O chlorophyll.
O sunlight
O protein.
O carboh rates.
sunlight..........................
Answer:
Sunlight
Explanation:
The respiratory system is made up of the airways, lungs, and respiratory muscles. The lungs are classified as –
cells.
tissues.
organs.
organisms.
pills and potions...bts promotions...Im angry but I still love anime<3
Answer:
Organs
Explanation:
It is a system of cells and tissues. Organisms are comprised of organs. Btw what anime do you like?
Answer:
lol it's classified as an organ
Explanation:
im 99.99%sure
what amino acids are non degenerate?
Answer:A position of a codon is said to be a non-degenerate site if any mutation at this position results in amino acid substitution. ... There are three amino acids encoded by six different codons: serine, leucine, and arginine. Only two amino acids are specified by a single codon each.
Explanation:I'm kinda confused about your questions, I think this is what your asking for. Hope this helps, if not. I'll try redoing it! :))
Which of the following is NOT a method your body uses to regulate homeostasis? A. change the flow of blood, B. shivering, C. sweating, D. taking a cool shower
Answer:
D. taking a cool shower
Explanation:
Taking a cool shower may not be a method through which the human body regulates homeostasis.
Homeostasis refers to the maintenance of relatively constant internal body processes. Homeostasis happens naturally in the body system.
A change in the flow of blood to the skin may happen in response to a breach to the normal body temperature. Increased blood flow happens in response to high body temperature and decreased flow happens in response to low temperature.
Shivering of the body happens in response to a drop in the normal body temperature. The shivering helps generate more heat for the body.
Sweating happens in response to excessive body temperature. The evaporation of the sweat causes cooling, thereby returning the body to its normal temperature.
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