The nucleus is an organelle that stands out the most in eukaryotes.There, the majority both DNA replication and RNA synthesis occur. The chromosomes of the cell are also housed.
What is the nucleus called?In terms of genomics, a nucleus is the organelle inside a cell that is membrane-enclosed and houses the chromosomes.The nuclear membrane has a variety of pores that enable the controlled passage of specific molecules (such proteins & nucleic acids) to and from the nucleus.
What is an example of a nucleus?The nucleus of skin cells is an illustration of a nucleus within real life.All of our genetic material is stored in the nucleus, and only the genes required for skin cells were expressed, giving rise to the distinct cell type required for the epidermis.
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Muscles are not likely to tear from their bones because Select one: a. the tendons are partially ossified at their attachment points to the periosteum.
b. a circumferential lamella sandwiches the ends of the tendon onto the surface of an adjacent lamella
c. perforating fibers of collagen attach the tendon and periosteum to the cortical surface of the bone
d. elastin fibers in the tendon can allow for stretching and recoil of the muscle
Muscles are not likely to tear from their bones because perforating fibers of collagen attach the tendon and periosteum to the cortical surface of the bone. Option C is correct.
Tendons are tough, fibrous connective tissues that attach muscles to bones, and they are designed to withstand the tension and stress generated by muscle contractions. The collagen fibers that make up tendons are arranged in a highly organized manner, providing strength and stability to the tendon.
Perforating fibers of collagen are bundles of collagen fibers that penetrate the periosteum, which is the dense connective tissue that covers the surface of bones. These fibers attach the tendon to the cortical surface of the bone, anchoring the muscle to the bone and providing a strong connection that resists tearing.
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ovulation occurs near the end of the ovarian cycle.
Ovulation occurs about tell via the feminine cycle, after the follicular step. The days wherein a person is most prolific can be liked in light of the date of the last feminine time rack and the size of a run-of-the-mill monthly cycle.
During days 10 to 14 of the cycle, only one of the creating follicles shapes a completely experienced egg. Around day 14 in the feminine cycle, an unexpected flood in LH makes the ovary discharge this egg. This is ovulation. After ovulation, the chemical progesterone rises which readies your uterus for pregnancy.
The follicle cells that are left behind form a little mass of endocrine tissue called the corpus luteum. The corpus luteum stays in the ovary for a considerable length of time, discharging the chemicals estrogen and progesterone. Toward the finish of the ovarian cycle, on the off chance that the lady isn't pregnant, the corpus luteum deteriorates.
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what is the process in which two gametes unite to form a single cell
The process in which two gametes unite to form a single cell is called fertilization.
During fertilization, a sperm cell from the male and an egg cell from the female combine to form a zygote, which is the first cell of a new individual.
Fertilization typically occurs in the female reproductive system, where the sperm must first travel through the cervix and uterus to reach the fallopian tube, where it may encounter an egg that has been released during ovulation.
If the sperm successfully penetrates the egg, the two gametes combine their genetic material to form a zygote. The zygote then begins to undergo cell division and differentiation to form an embryo, which will eventually develop into a fetus and then a newborn baby. Fertilization is a critical step in sexual reproduction, as it ensures genetic diversity and variation in offspring.
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What are the factors that have lead to environmental awareness?
Some factors that have led to environmental awareness are Scientific research and discovery, Media coverage, Environmental activism etc,
Scientific research and discovery: Advances in scientific research and technology have helped us to better understand the natural world and the impacts of human activities on the environment. For example, research on climate change, air and water pollution, and habitat destruction has helped to raise awareness about the urgent need for conservation and sustainable development.
Media coverage: Increased media coverage of environmental issues has helped to raise awareness and inspire action. Coverage of environmental disasters, such as oil spills or toxic waste contamination, as well as documentaries and news reports on climate change and habitat destruction, have helped to educate the public about the severity and urgency of these issues.
Environmental activism: The growth of environmental movements and organizations has also played a significant role in raising awareness and promoting action on environmental issues. Grassroots organizations and advocacy groups have helped to mobilize public opinion and put pressure on governments and businesses to adopt more sustainable practices.
Environmental education: Education programs at all levels, from primary schools to universities, have helped to raise awareness and encourage people to take action on environmental issues. By teaching people about the natural world, the impact of human activities, and the importance of conservation and sustainability, education has helped to inspire a sense of responsibility and a commitment to action.
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1. What advantage is gained by having so many steps in one signal transduction pathway?Greater amplification of the signalGreater size of genome to code for proteinsIncreased number of proteins to be synthesized by the cellIncreased time interval between signal and response
option 1)Greater amplification of the signal is gained by having so many steps in one signal transduction pathway.
In order to elicit a response, the signal transduction pathway requires the binding of extracellular signaling molecules and ligands to receptors either within or on the cell surface. The cell's metabolism, structure, and gene expression may then change in response.
For instance, insulin regulation involves signal transduction pathways. The route will signal for an increase in glucose transporters in the cell membrane if the hormone is required by muscle cells (to support higher physical activity, for example).
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Full Question: What advantage is gained by having so many steps in one signal transduction pathway?
Greater amplification of the signal Greater size of genome to code for proteins Increased number of proteins to be synthesized by the cell Increased time interval between signal and response.How does the comparison of the stages of embryological development of different species help biologists to classify life?A. It helps in understanding the similarities between living species and extinct species.B. It reveals anatomical similarities that are not always evident in fully formed organisms.C. It reveals differences in the environmental conditions necessary for species survival.D. It helps in understanding the different behavioral strategies in different individual organisms.
A. It helps in understanding the similarities between living species and extinct species does the comparison of the stages of embryological development of different species help biologists to classify life
How can examining how various species grow during the embryonic stage lend credence to the hypothesis of evolution?Comparative embryology is a branch of biology that studies the relationships between different animal species and how embryos grow. By proving that all vertebrates develop similarly and may have shared an ancestor, it has strengthened evolutionary theory.
By demonstrating that many species share a wide range of early-life traits that eventually take on distinct purposes, embryology adds support to Darwin's theory of evolution. These data imply that they could have shared a common progenitor.
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conophytum pageae, a small succulent native to south africa and southern namibia. t/f
True, conophytum pageae is a small succulent native to south africa and southern namibia.
Conophytum Pageae: What is it?
Conophytum pageae is a little succulent that typically forms a small mound by growing in groups of several bodies. The bodies are made up of two almost totally merged leaves, are inversely conical, up to 1 inch (2.5 cm) tall, and up to 1.4 inches (3.5 cm) in diameter.
The largest species in the Conophytum genus, with an extent of occurrence (EOO) of 50 434 km2, is frequently found in Southern Namibia and the Namaqualand region of South Africa. Conophytum is thought to have sedative qualities, probably as a result of alkaloids of the mesembrine type.
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What kind of molecules bind to specific sites on receptor proteins in the plasma membrane?
Target cells' plasma membranes are directly crossed by a number of tiny hydrophobic signal molecules that then link to internal receptor proteins.
Neurotransmitters interact with receptors to change the ionic porosity of the cell membrane and modify the membrane potential by opening or closing ion channels. Ligands are molecules which bind to receptor sites. Examples of ligands include hormones, neurotransmitters, and medications. Similar to how keys can only fit into certain locks, they can fit into particular receptor locations. Receptors are typically transmembrane proteins that bind to signalling molecules outside of the cell and then convey the signal to internal signalling pathways using a series of chemical switches.
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How can overgrazing lead to soil erosion?
Which structure is not a part of the sporophyte generation? A) Flower B) Anther C) Egg D) Leaf.
The egg is basically not a part of the sporophyte generation.
What do you mean by sporophyte?
A sporophyte is the diploid (2n) stage of the life cycle of a plant. It is the result of the fusion of the male and female gametes produced by the gametophyte (1n) stage. Its primary role is to produce spores which will eventually develop into gametophytes.
The egg is part of the gametophyte generation. The gametophyte generation is the haploid phase of the plant life cycle, which includes the production of gametes (eggs and sperm) through meiosis. The sporophyte generation is the diploid phase of the plant life cycle, which includes the production of spores through meiosis. The egg is not part of the sporophyte generation because it is part of the haploid phase of the life cycle.
Hence, option C is correct.
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Which part of the eye helps in bending of light rays?
The component of the eye that aids in light beam bending is called the cornea. The cornea functions like a lens and bends light rays inward as a result of its shape and the difference in indexes of refraction.
The cornea is not a powerful enough lens on its own (i.e., it does not bend light rays sufficiently) to create an image in the retina. The cornea, the transparent window on the outside of the eyeball, bends or refracts light before it enters the eye.
The majority of the eye's optical power, or capacity to bend light, is provided by the cornea. Refraction is the term for the bending of light as it passes through transparent materials (it also occurs with sound, water, and other waves).
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is a disaccharide important in the formation of alcoholic beverages called?
A glucose molecule and a glucose particle are joined together to form malt sugar. A crucial disaccharide in the production of alcoholic drinks.
Explain what carbohydrate is.When two carbs (simple sugars) are linked together via glycosidic linkage, a disaccharide (also known as a double sugar) is produced. Carbs are soluble in water, just like monosaccharides are. Fructose, lactose, and maltose are three examples that really are typical.
Disaccharides – are they all carbohydrates?Disaccharides. Disaccharides are carbohydrates that are produced by joining two single sugar molecules. The main sugar in milk, lactose, is a disaccharide that contains both galactose and glucose atoms. Another example is table sugar, which is made from cane sugar and is also referred to it as sucrose.
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in the cardiac myocyte the phase of rapid depolarization is due to
Its main mechanism causing this gradual depolarization is its pacemaker current as well as depolarization current. Through into the cyclic nucleotide-gated channel, Na+ ions enter slowly.
Is installing a pacemaker a big deal?Surgery to implant a pacemaker is considered to be minimal. Local anesthesia can be utilized in most situations. The doctor will make a little incision upon this wall of your chest, just below the collarbone.
What purpose does a pacemaker fulfill?When an arrhythmia occurs, its cardiac may beat too rapidly, too slowly, or erratically. Thier heart can beat regularly and rhythmically with the help of pacemakers. Additionally, pacemakers can help their heart's chambers beat with harmony, allowing your heart to more efficiently pump blood throughout your body.
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Suggest two measurable plant traits that could affect relative fitness and explain them briefly:
Relative fitness refers to the ability of an organism to survive and reproduce compared to other individuals in the same population. In plants, various traits can affect their relative fitness, which can be influenced by both genetic and environmental factors.
Here are two measurable plant traits that can affect relative fitness:
Photosynthetic efficiency: This refers to the ability of a plant to effectively use light energy to produce glucose through photosynthesis. More efficient photosynthesis can lead to greater growth, reproduction, and survival, making a plant more fit compared to others with lower photosynthetic efficiency.
Seed dispersal: This refers to the ability of a plant to scatter its seeds away from the parent plant and into new environments. Seed dispersal can help a plant to colonize new areas, avoid competition with other plants for resources, and increase its relative fitness.
For example, plants with fruits that are eaten by birds or animals and then dispersed elsewhere can have a higher fitness advantage compared to plants with seeds that remain close to the parent plant.
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You’re studying one genetic locus in a population of wombats and you sample 40 individuals with genotype AA, 60 individuals with genotype Aa, and 100 individuals with genotype aa. The frequency of the a allele is exactly twice that of the A allele. True or False?
False: The frequencies of the 'a' and 'A' alleles are not epsilon-totally equal.
Allele "a" occurs 0.65 times more frequently than allele A, which occurs 0.35 times more frequently.
200 times 2 equals 400 total allele.
Total allele is equal to 200 divided by 2.
The term "genotype" refers to the classification of variants found at a particular locus (i.e., location) in the genome. It can be pictured with symbols. As an example, the letters BB, Bb, and bb could be used to indicate a particular gene variant.
A population with two alleles (A and a) at locus A is capable of having the genotypes AA, Aa, and aa. Individuals with the genotypes AA and aa are homozygotes (i.e., they have two copies of the same allele).
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This plane divides the body into equal right and left halves.
a) frontal
b) midsagittal c) transverse d) oblique
e) coronal
This line splits the body into equal halves on the right and left. frontal plane (also called the coronal plane).
Which plane also goes by the name coronal plane?Another name for the coronal plane is the frontal plane. Slices cut from the coronal plane of the brain resemble slices from a loaf of bread. As if slicing a bagel or hamburger bun, horizontal cuts are formed. The left and right sides of the brain are divided into sections by the sagittal plane.
What is the brain's coronal plane?The brain is split into an anterior and a posterior region by a coronal plane, also known as the frontal plane. It is made by cutting the brain perpendicular to the body's long axis, which results in a perpendicular slice.
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what is the bacteria cell chromosome?
Bacterial cells have a single, circular chromosome that contains all of their genetic information.
The chromosome is located in the nucleoid region of the cell and is not separated from the cytoplasm by a membrane-bound nucleus. Instead, it is surrounded by a nucleoid-associated protein complex that helps organize the chromosome and regulate gene expression.
The size of a bacterial chromosome varies depending on the species, but typically contains 1 to 6 million base pairs (compared to about 3 billion base pairs in the human genome). In addition to the chromosome, many bacteria also carry plasmids, which are small, circular pieces of DNA that can replicate independently of the chromosome.
Plasmids often contain genes that provide the bacterium with additional functions, such as antibiotic resistance or the ability to metabolize specific nutrients. Overall, the bacterial cell chromosome plays a critical role in determining the characteristics and behaviors of the cell, as it contains all of the genetic information needed for growth, reproduction, and survival.
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The biological species concept relies on a disruption of which aspect of population genetics?
a. mutation
b. selection
c. gene flow
d. genetic drift
e. all of the above
The idea of biological species depends on a disturbance of the population genetic process known as mutation.
The correct statement is A.
What are the different names for mutations?Base substitutions, deletions, and insertions are the three different kinds of DNA mutations. 1. Base Substitutions. Point mutations are single base substitutions; for instance, the sickle-cell disease chromosomal rearrangements Glu -----> Val. There are two different forms of point mutations,
What is a human mutation?A genetic mutation refers to a modification to the DNA sequence of a gene that results in the production of an alternative product. It alters the DNA sequence of that gene permanently. For people to develop, which is a process of change across generations, genetic variances are crucial. One individual experiences a sporadic genetic mutation.
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walking along a large city park on a hot summer day, you look for a cool resting place and sit down on a large rock under a willow tree, at the quiet edge of a stream. you have searched for and found an example of a _____.
Walking along a large city park on a hot summer day, you look for a cool resting place and sit down on a large rock under a willow tree, at the quiet edge of a stream. you have searched for and found an example of a microclimate.
What is a microclimate?
A park, garden, or even a single city block might include a microclimate, which is a confined environment. Due to many elements like geography, vegetation, and human activity, it differs from the climate of the wider area.
For instance, the urban heat island effect might cause a city's core to be hotter than the nearby rural areas. Similarly to this, the presence of plants and artificial heating may cause a garden or greenhouse to have a warmer and more humid atmosphere than the surroundings. Plant and animal species can also be impacted by microclimates because some may thrive in one while faltering in another.
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at the same temperature and pressure, balloons of equal volume always contain. true or false?
At the same temperature and pressure, balloons of equal volume always contain same amount of gas True.
The correct option is True
True. At the same temperature and pressure, balloons of equal volume will always contain the same amount of gas.
The amount of gas contained in a balloon is determined by the volume of the balloon and the pressure of the gas inside, as described by the Ideal Gas Law (PV = nRT).
If two balloons have the same volume and are at the same temperature and pressure, they will contain the same amount of gas, regardless of the type of gas or the material the balloons are made of.
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What happens to the hybrid zone when gene flow is established?A. Hybrids cease to be formed.B. Gene flow between distinct gene poolsC. Adaptive radiationD. Extended hops
The answer to the question is that once gene flow is stabilized, hybrids can no longer arise.
Describe gene in simple terms.The fundamental functional and structural component of heredity is a gene. DNA is the constituent of genes. Some genes serve as blueprint for the synthesis of proteins. Many dna do not, however, code for proteins.
What sort of genetic is it, accurately?Many of you traits, like your skin and hair colors, are determined by genes that are bestowed to you. Perhaps Emma's mother possesses both the brown and red hair genes, and she gave Her the red hair gene. Her red hair may well be explained if her father carries two red hair genes.
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pieces of dna that pass genetic traits from parent to offspring is called?
Your traits, or qualities, which are passed down from your parents or from them, are determined by the information carried by your genes. In the human body, each cell has between 25,000 and 35,000 genes.
What do the DNA fragments that convey genetic features from parents to children look like?The fundamental genetic component transferred form parent to child. Genes are composed of DNA sequences and are organized sequentially at specified sites on chromosome in the cell nucleus.
What genes can you only get from your father?All males receive a Sex chromosomes from their father, hence all characteristics that can only be found just on Y chromosome were passed down from father to son. The Proof in Support: Y-linked features have a definite paternal trend.
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Where on a DNA strand does replication begin?
on the closed end of the DNA strand
on both ends of the DNA strand
on the middle of the DNA strand
on one end of the open part of the DNA strand
The DNA replication begins at both the ends which are close to the replication fork. Replication fork is the site where the unwinding of DNA begins. Thus, the correct option is B.
What is DNA replication?DNA replication is the biological process of producing two new identical replicas of the DNA molecule from one original parent DNA molecule. DNA replication occurs in all types of living organisms which are acting as the most essential part for the biological inheritance.
DNA replication initiates at the specific points called as origins, where the structure of DNA double helix is unwound. A short segment of the RNA molecule, called as a primer, is then synthesized and acts as the starting point for the new DNA synthesis. An enzyme called as DNA polymerase then begins replicating the DNA molecule by matching bases to the original strand.
Therefore, the correct option is B.
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Answer: on one end of the open part of the DNA strand.
Explanation: i put b like the person above me said the answer was and it was wrong !
What are the items required for DNA replication?
Template DNA, dNTPs, DNA polymerase, primer, SSBs, topoisomerases, helicase, RNA primase, DNA ligase, and Okazaki fragments are required for DNA replication.
What is the overall process of DNA replication?DNA replication is the process by which a cell duplicates its DNA before cell division. It involves the unwinding of the double helix to create a replication fork, which is stabilized by SSBs and relieved of torsional strain by topoisomerases. Helicase unwinds the dsDNA, and RNA primase synthesizes RNA primers on the template strand. DNA polymerase then extends the primers with complementary nucleotides to create new DNA strands. On the lagging strand, DNA is synthesized in short fragments known as Okazaki fragments, which are later joined by DNA ligase.
What would happen if the primer were not present during DNA replication?Without the presence of a primer, the DNA polymerase enzyme would not have a free 3'-OH group to which it could add new nucleotides. Therefore, the replication process would not be able to begin and progress along the template strand. Primers are essential for DNA replication to initiate and without them, the replication process would not proceed.
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which cell type is found in greatest abundance in the germinal centers?a. microphagesb. B lymphocytesc. Helper t cellsd. Phagocytes
Lymphocytes is found in great abundance in the germinal centers.
What do you mean by Lymphocytes?
Lymphocytes are a type of white blood cell that play a major role in the body's immune system. They are responsible for recognizing and responding to foreign substances (antigens) and producing antibodies that help fight off infections. They are also involved in the regulation of immune responses and the development of immunological memory.
In the germinal centers, B cells and T cells undergo antigen-dependent differentiation, maturation, and selection, allowing them to become effective in destroying infected or malignant cells. The lymphocytes in the germinal centers are able to recognize and respond to a wide variety of pathogens, making them essential for immunity against various disease-causing agents.
Hence, option B is correct.
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Species in which both megasporangia and microsporangie flowers occut on the same plants are called?A. perfectB. dioeciousC. monoeciousD. imperfectE. sterile
Species in which both megasporangia and Microsporangia flowers occur on the same plants are called : C. monoecious.
What do you understand by monoecious?In most angiosperms, flowers are perfect and each has both microsporangia and megasporangia. Some angiosperms are imperfect, that is having either microsporangia or megasporangia but not both. Monoecious plants have both types of imperfect flower on same plant. Examples are :cucurbits and coconuts.
Monoecious refers to both when male and female reproductive organs are present in same organisms or plants. Dioecious plants is when male and female reproductive organs are distinct, which means that they are present in two separate organisms or plants.
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The fluid mosaic model proposes that
(a) membranes can move like a fluid.
(b) proteins are embedded into the cell membrane.
(c) materials that are fluid move across a membrane.
(d) the composition of membranes includes a mosaic fluid.
According to the fluid mosaic theory, membranes can move fluid-like.
What about membranes is suggested by the fluid mosaic model?An intriguing description of the molecular structure and functional characteristics of the plasma membrane is provided by the fluid mosaic model, which Singer and Nicholson suggested in 1972. The plasma membrane, according to this theory, is a two-dimensional, essentially fluid mixture of structured lipids and globular proteins.
Which fluid makes up the fluid mosaic model?Cell membranes are modelled as fluid mosaics due to the following characteristics: Due to its viscosity, the phospholipid bilayer is fluid and allows for the free movement of individual phospholipids. Proteins are incorporated into the phospholipid bilayer to form a mosaic-like structure.
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What is the meaning of vestigial structures?
Vestigial structures are the remnants of organs and body parts that were once useful to an organism's ancestors, but are no longer functional in the present day. Examples of vestigial structures include the appendix in humans and the wings of flightless birds.
Vestigial structures are anatomical features that are remnants of organs or structures that were functional in an organism's ancestors, but are no longer necessary for survival.
These structures can be found in many different species and are evidence of evolutionary change over time. For example, the appendix in humans is a vestigial structure that is no longer necessary for digestion, but was likely important in the digestive processes of our ancestors.
Other examples of vestigial structures include the tailbone in humans, the wings of flightless birds, and the pelvic bones of whales.
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combining the carboxyl group with the hydrocarbon chain creates?
Combining a carboxyl group with a hydrocarbon chain creates a fatty acid. Fatty acids are organic molecules that consist of a hydrocarbon chain and a carboxyl group (-COOH) at one end.
The hydrocarbon chain can vary in length and degree of saturation, which determines the properties of the fatty acid.
There is no double bond in saturated fatty acids (SFA); This kind of fat is made by the body and comes primarily from animal products like full-fat dairy products, red meat, and poultry. In addition, there are numerous varieties of SFA based on the length of their chain, which ranges from 4 to 16 carbon atoms.
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plants store glucose as polysaccharides in the form of _____GlycogenStarchMonosaccharideCellulose
plants store glucose as polysaccharides in the form of Starch Glycogen Starch.
What is the name of a polysaccharide?Most naturally occurring carbohydrates exist in the form of polysaccharide, also known as glycan.Both branching and linear molecular structures are possible for polysaccharides.
How are polysaccharides stored by plants?Starch is a polysaccharide storage substance and is present in plant cells as intracellular granules, not as a structural element.Starch is produced during photosynthesis in the chloroplasts of plant leaves.In certain areas of the green plant, it is preserved as minute granules.
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