Demethylation and acetylation lead to an open chromatin structure and are associated with euchromatic regions of genomes.
What is chromatin?
The term "chromatin" refers to a compound of DNA and proteins that makes up the chromosomes found in the cells of higher creatures like humans. The enormous amount of DNA in a genome is packaged by many proteins, most notably histones, into a shape that can fit inside the cell nucleus.
Long DNA molecules are bundled into smaller, denser structures as the main purpose.
Therefore, Demethylation and acetylation lead to an open chromatin structure and are associated with euchromatic regions of genomes.
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Which three of the following best describe what would happen if mitosis did not take place?.
Organisms would be single-celled. Asexual reproduction would not occur.
Body tissues would not repair
themselves are the best which describes what would happen if mitosis did not take place.
Mitosis refers to the procedure of cell
division, in which a cell goes through a
carefully mediated nuclear division, which results in the production of two genetically similar daughter cells. The mitosis comprises five active stages, that is, prophase, premetaphase, metaphase, anaphase, and telophase. In a single-celled species like an amoeba, it
is the process of mitosis by which the cells reproduce. After undergoing through the five stages of mitosis, it is via the procedure called cytokinesis, the single cell dissociates into two similar cells, thus, completing the reproduction.
During injury, the process of mitosis takes place to substitute the damaged cells. This repair is mainly essential for the blood vessels and skin that safeguards the organs and muscles in the body. Mitosis also assists to substitute the lost blood via a wound.
Thus, if the process of mitosis would not
take place, then the organism would
remain a single-cell, asexual reproduction single-cell, asexual reproduction would not take place, and the tissues single-cell, asexual reproduction would not take place, and the tissues of the body would not be able to repair single-cell, asexual reproductionwould not take place, and the tissuesof the body would not be able to repairthemselves.
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Complete question:
Which three of the following best describe
what would happen if mitosis did not take
place?
A. Organisms would be single-celled.
B. Chromosomes would not duplicate.
C. Asexual reproduction would not occur.
D. Body tissues would not repair
themselves.
E. The production of gametes would not
Occur.
What structure is responsible for selecting and transporting only properly processed eukaryotic mrnas into the cytoplasm?.
The nuclear pore complex is responsible for selecting and transporting only properly processed eukaryotic mRNAs into the cytoplasm.
How is the nuclear pore complex formed?It is separated from the rest of the cell by a boundary called the nuclear envelope, which consists of a two-layer membrane. All transport into and out of the nucleus must occur through channels within the envelope formed by large assemblies of proteins (nucleoporins) called nuclear pore complexes. Each NPC contains at least 456 individual protein molecules and is composed of 34 different nucleoporin proteins.Where is the nuclear pore complex located and their function?The nuclear pore complex (NPC) is a macromolecular protein assembly embedded in the double lipid bilayer of the nuclear membrane and is the single gateway for macromolecular transport between the nucleus and cytoplasm. The structure of NPCs (cylindrical ring-like structures lined with nucleoporins that can bind transport factors) determines their transport function.Each nuclear pore allows the free diffusion of small molecules and ions into and out of the nucleus. Nuclear pores also allow desired proteins to move from the cytoplasm to the nucleus if they carry a special sequence that indicates they belong to the nucleus.To learn more about nuclear pore complex visit:
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arrange these taxonomic terms from most inclusive (most general) to least inclusive (most specific). 1. tetrapods 2. animals 3. amniotes 4. vertebrates 5. deuterostomes
deuterostomes → vertebrates → animals→ tetrapods → amniotes
taxonomic terms from most inclusive (most general) to least inclusive (most specific).
What does biological classification entail?
Taxonomic ranks are used in biology to categorize organisms. These ranks include, among others (in order from most inclusive to least inclusive): Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, and Strain.
Taxonomy is the science of categorization in the broadest sense, but it is more specifically the classification of living and extinct creatures, or biological classification.
Therefore, Domain (most inclusive), kingdom, phylum, class, order, family, genus, and species make up the taxonomic hierarchy from most to least inclusive.
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The human genome project was launched in 1986 to better understand the human genome, when was it completed?.
The human genome project was launched in 1986 to better understand the human genome, completed in 2003.
What is human genome project ?The Human Genome Project was an international scientific research project aimed at determining the base pairing of human DNA and identifying, mapping and sequencing all the genes of the human genome physically and functionally. Construction began in 1990 and was completed in 2003.The Human Genome Project will chemically sequence the entire human genetic makeup (i.e., the whole genome), identify all 50,000 to 100,000 genes in the genome, and provide the research tools to analyze them all.It is an international research project whose main mission is to genetic information.Despite the controversy, HGP was initiated in his 1990s, led by American geneticist Francis Collins, with support from the US Department of Energy and the National Institutes of Health (NIH). Scientists around the world quickly joined the effort.To learn more about human genome project from the given link :
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epigenetics refers to the: question 47 options: study of the mechanisms that control gene expression and its effect on behavior and health. study of harmful agents or substances that can cause malformation or defects in an embryo or fetus. study of karyotypes and the contribution of chromosomes to the development of genotypes. scientific study of the complete set of dna in the human organism
Epigenetics is the study of how your behaviors and environment can cause changes that affect the way your genes work.
The field of study known as epigenetics is concerned with heritable changes in gene expression that do not entail alterations to the DNA's base sequence. Literally translated, it means above genomes.
Scientists and academics have been investigating how DNA influences human behavior and society. The field of study known as epigenetics accurately describes how an individual's environment affects how their genes are expressed.
Epigenetics can be regarded as the study of how behaviors as well as environment of individuals can bring changes that affect the way in which their genes work.
Unlike genetic changes, epigenetic changes can be reversed because it doesn't change the DNA sequence. So using DNA structure, genetic changes can be explained unlike epigenetics.
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how did charles lyell's principles of geology contribute to darwin's formulation of evolution by natural selection? group of answer choices
Based on the expression of Charles Lyell, Darwin became interested in creating and developing a theory that is now known as the theory of natural selection. Charles Darwin's theory of natural selection is based on competition and adaptation. In nature, there is a law that the strong will survive.
How Darwin discovered the theory of natural selection?Darwin discovered this theory when he was traveling on a ship from England, the HMS Beagle. Utu's voyage was carried out in 1831 to observe animals and plants. From the observations that Darwin made, it turns out that he had doubts about previous studies which said that every living thing does not experience growth or development. According to Darwin, every living thing will experience growth or development.
To prove this, Darwin went to the Galapagos archipelago which is 600 miles or 1,000 km off the coast of the United States. When he got there, Darwin began observing turtles that were quite large. From his observations of turtles, Darwin began to understand that these turtles came from the same ancestor, only that these giant turtles had evolved because they were isolated on different islands.
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Sunlight hits different locations on Earth with varying intensity. How does this
differential heating affect the atmosphere?
A. At the equator, insolation is less intense, so the air is warmer and
rises.
B. At the equator, insolation is more intense, so the air is warmer and
rises.
C. At the equator, insolation is less intense, so the air is warmer and
sinks.
D. At the equator, insolation is more intense, so the air is warmer and
sinks.
The differential heating affect the atmosphere because at the equator, insolation is more intense, so the air is warmer and rises and is denoted as option B.
What is Insolation?This is a term which is referred to as the amount of solar radiation that is received by a planet. The energy in this process has some absorbed and reflected in the atmosphere and is more intense at the equator.
This high intensity causes the air to be heated which makes it warmer and rises up and is therefore the reason why option B was chosen as the correct choice.
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the superior esophageal sphincter is closed during inhalation of air, so that air doesn't enter the and enters the and trachea instead.
When a person breathes in, the sphincter contracts and closes, preventing air from going into the esophagus and instead allowing it to go into the larynx and the trachea.
What is superior esophageal sphincter?
The term "upper esophageal sphincter" (UES) refers to the area of the esophagus that is located between the pharynx and the cervical esophagus and has a higher pressure than the rest of the esophagus. This sphincter's function in the body is to defend against the backflow of food into the airways while also preventing air from entering the digestive system. It does this by acting as a barrier.
Acid that has flowed back into the esophagus can be able to enter the throat if the upper esophageal sphincter is damaged.
Therefore, the the superior esophageal sphincter is closed during inhalation of air, so that air doesn't enter the esophagus and enters the larynx and trachea instead.
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The most important adaptive advantage associated with the filamentous nature of fungal mycelia is.
The large surface area that the filamentous form of fungal mycelia offers is the most significant adaptive benefit suitable for invasive growth and absorptive feeding.
A mycelium, also known as mycelia, is a fungus's root-like structure made up of a mass of branching, thread-like hyphae. Mycelium-based fungi can be found in and on soil as well as many other substrates. A mycelium can be small, growing into an invisible colony, or it might expand to cover thousands of acres, as in the case of Armillaria.
Due to their function in the microbial breakdown of plant matter, mycelia are essential to both terrestrial and aquatic ecosystems. As they grow, they add to the organic portion of the soil and release carbon dioxide into the atmosphere. Many soil invertebrates rely on mycelium as a major food source. Nearly all plant species depend on them, and many species have coevolved with fungus, making them essential to agriculture and to all plant species. Mycelium plays a key role in the fitness of plants by influencing their health, nutrient uptake, and growth.
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Compared to the cell in g1, the number of chromosomes in one cell _______ after the s phase and _______ after the m phase.
Compared to the cell in G1, the number of chromosomes in one cell is 14 after the S phase and 14 after the m phase.
A cell's growth and division are governed by a series of events known as the cell cycle. The majority of a cell's time is spent in interphase, where it grows, replicates its chromosomes, and gets ready for cell division. After that, the cell enters mitosis, completes its division, and leaves interphase.
In the G1 phase, the cell synthesizes, and in the S phase, DNA replication, the cell cycles in the order G1–S–M.
In the beginning, there were 14 chromosomes in the G1 phase.
The number of chromosomes does not change during the S phase. Thus, there are once more 14 chromosomes.
Again, there is no change at the beginning of the M phase.
Thus, the cell will have the chromosome number at G1, after S, and after M stage individually are
14,14,14.
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(complete question)
Compared to the cell in g1, the number of chromosomes in one cell _______ after the s phase and _______ after the m phase. if it has 14 chromosomes at the beginning of interphase?
All of the following factors influence the economy of a society except for which one?
*
1 point
needs & wants of people
available resources
supply & demand
healthcare available
Answer:
Economists generally agree that economic development and growth are influenced by four factors: human resources, physical capital, natural resources, and technology. Highly developed countries have governments that focus on these areas.
all organisms have , which determines everything from an organisms shape to its life functions
Using the theories of life functions, we got that cell which all organisms have , and which determines everything from an organisms shape to its life functions.
All organisms are actually made up of one or more cells. Actually, Cells aggregates so that they can form tissue, tissue actually organize to form the organs and organs system and finally body of the living organism. Cells are actually responsible for all metabolic activities in living organism.
Hence, all organisms have , which determines everything from an organisms shape to its life functions is cell.
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Changes in allele frequencies in a population or species that occur over a relatively short time rather than millions of years is an example of?.
Changes in allele frequencies in a population or species that occur over a relatively short time rather than millions of years is an example of microevolution.
Microevolution is the change in a population's allele frequencies over time. Three systems can make allele frequencies change: gene flow, natural selection (the transfer of alleles between populations), and genetic drift (happenings that alter allele frequencies).
An allele frequency can be determined by dividing the total number of copies of each allele at that particular genetic locus in the population by the number of times the allele of interest is observed in a population.
Microevolution begins with speciation, which may result from macroevolution.
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where is the chloroplast location?
Answer:
Chloroplasts are commonly found in guard cells located in plant leaves, roughly 1–2 μm thick and 5–7 μm in diameter.
For a neuron at rest_________ a. both an electrical and diffusion force drive sodium ions out of the cell. b. sodium ions do not move across the membrane in a neuron at rest. c. both an electrical and diffusion force drive sodium ions into the cell.
According to the research, the correct answer is option A. For a neuron at rest both an electrical and diffusion force drive sodium ions out of the cell.
What is a resting neuron?It is the one that presents a potential difference between the internal side and the external side of the plasma membrane or cell membrane, whose function is fundamental in this difference in polarity.
In this sense, the resting membrane is impermeable to Na+ but allows K+ to pass through, that is, it makes the concentration of sodium ions higher on the outside and the concentration of K ions higher on the inside.
Therefore, we can conclude that according to the research, for a neuron at rest there are more sodium ions outside the neuron and more potassium (K) ions inside it.
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if the rna polymerase is transcribing mrna (moving) from right to left on this piece of dna, is it using the top or bottom strand as the template strand of the dna?
The template strand of the DNA is the coding strand.
RNA polymerase is a multi-unit enzyme that synthesizes RNA molecules from a template of DNA through a method referred to as transcription. The transcription of genetic information into RNA is the first step in gene expression that precedes translation, the method of decoding RNA into proteins.
Biology, RNA polymerase, or more in particular DNA-directed/established RNA polymerase, is an enzyme that synthesizes RNA from a DNA template. RNA polymerase I am placed in the nucleolus, a specialized nuclear substructure wherein ribosomal RNA (rRNA) is transcribed, processed, and assembled into ribosomes. The rRNA molecules are considered structural RNAs because they have a cell position but are not translated into protein.
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The _____________ stage in the life cycle of viruses differs greatly because of the different types of nucleic acids found in each virus. the ___________stage in the life cycle of viruses differs greatly because of the different types of nucleic acids found in each virus.
The synthesis stage in the life cycle of viruses differs greatly because of the different types of nucleic acids found in each virus.
A virus is a submicroscopic infectious agent that replicates only within an organism's living cells. Viruses infect all forms of life, including animals and plants, as well as microorganisms such as bacteria and archaea.
Viruses cannot replicate on their own and must rely on the protein synthesis pathways of their host cell to do so. This is typically accomplished by the virus inserting its genetic material into host cells, co-opting the proteins to create viral replicates, and causing the cell to burst due to the high volume of new viral particles.
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Why beta cells would have a greater concentration of rough endoplasmic reticulum and ribosomes than some other cell types.
As Beta cells have a massive production and secretion of insulin, the endoplasmic reticulum and ribosomes have a greater concentration so as to satisfy the demand of the hormone in the body.
What are beta cells?
Beta cells are found in a cluster of cells in the pancreas called pancreatic islets. These cells synthesize, produce and secrete insulin. Glucose levels in blood are regulated by the hormone Insulin.
Beta cells secret the stored insulin and increases production of the hormone when the glucose levels rise in the blood(during digestion).
The response to spike in glucose levels in blood takes like 10 minutes.
These beta cells are either attacked or destroyed by the immune system in people with diabetes or they cannot produce an enough amount of insulin that is required for control of blood sugar levels.
Therefore, as Beta cells have a massive production and secretion of insulin, the endoplasmic reticulum and ribosomes have a greater concentration so as to satisfy the demand of the hormone in the body
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Without the plasma cells of living things will die because they are unable to maintain…
Answer:
Without the plasma cells of living things will die because they are unable to maintain homeostasis.
Explanation:
in a particular plant, green seed color is dominant to blue. if two plants with green seeds were crossed and resulted in 302 green and 98 blue seed plants, what was the most probable genotype of each parent?
If two plants with green seeds were crossed and resulted in 302 green and 98 blue seed plants, then the most probable genotype of each parent will be heterozygous since 3:1 phenotypic ratio is the result we can observe for a monogenic trait in a Punnett square.
What is a Punnett square?A Punnett square is a diagram used in genetics to estimate genotype and phenotypic frequencies after a cross, which may be monogenic or include more than a single gene.
In this case, the cross is between two heterozygous individuals for a monogenic trait that exhibits complete dominance, it is the reason for which we can see a proportion 3:1 in the phenotypic ratios in a Punnett square.
Therefore, with this data, we can see that a Punnett square can be used to determine the phenotypic ratios, which are statistically close to the observed in this example to a 3:1 ratio.
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Why might stem cells from human embryos be more useful than stem cells from adults.
It's possible that adult stem cells are less adaptable and durable than embryonic stem cells. The potential for using adult stem cells to cure diseases is constrained by the fact that not all cell types can be produced from adult stem cells.
Most scientists and researchers believe that embryonic stem cells could be used to treat a variety of conditions, including multiple sclerosis, diabetes, Parkinson's disease, cancer, Alzheimer's disease, heart disease, hundreds of uncommon immune system and genetic abnormalities, and spinal cord injuries.
In addition to being more adaptable than adult stem cells, embryonic stem cells are also simpler to cultivate in a lab.
As a result, we might conclude that adult stem cells may not be able to be modified to produce all cell types, which restricts their use in the treatment of disease. because adult stem cells are less helpful than stem cells from human embryos.
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Select the correct answer from each drop-down menu.
The backbone of DNA and RNA is composed of
. DNA is double stranded due to interactions between adenine, cytosine, guanine, and thymine, which are
. Uracil is a
.
Reset Next
The backbone of DNA and RNA is composed of alternating sugar and phosphate groups.
DNA is a double stranded molecule due to interactions between adenine, cytosine, guanine, and thymine, which are nitrogenous bases.
Uracil is a nitrogenous base found in RNA.
DNA is Deoxyribonucleic Acid. It is a double stranded molecule with nitrogenous bases projecting perpendicularly inside and forming hydrogen bonds with each other. It the most prevalent form of genetic material as it is more stable than RNA.
Uracil is a nitrogenous base which is a pyrimidine derivative. It is the demethylated form of thymine. It binds to adenine with 2 hydrogen bonds.
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what is the purpose of no-till cultivation or soil conservation? group of answer choices to allow organic matter to accumulate naturally and maintain soil structure and pore space to preserve soil structure and natural fertility to mix in fertilizer to kill and remove weed plants to increase organic matter decomposition and release nutrients for crop growth to allow water to enter the soil and prevent run-off and erosion to open the soil for planting
Increased organic matter retention, nutrient cycling, and water infiltration into the soil are all benefits of no-till farming. It can stop or significantly lessen soil erosion. As a result, choices A and B are the proper responses.
This is especially helpful in areas that frequently experience drought, where a shortage of water is a serious problem linked to crop loss. The adoption of no-till farming also lowers soil erosion and enhances soil biological activity and organic matter. Over time, farmers may see significant financial gains as a result of these advantages.
No-till Without disturbing the soil with tillage, farming, often referred to as zero tillage or straight drilling farming, is a method of growing crops or pasture from year to year.
So that we may state that the goal of no-till agriculture or soil conservation is to allow organic matter to collect naturally and to maintain soil structure and pore space in order to protect soil structure and natural fertility.
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The rate of transcription for a gene is found to be affected by a mutation. Where would you expect the mutation to appear on the dna?.
Mutations can occur in germ-line cells or somatic cells as it affects the rate of transcription for a gene is found to be affected by a mutation.
How does mutation affect transcription?When DNA harm in the transcribed strand of an active gene is bypassed by an RNA polymerase, it can miscode at the destruction site and produce mutant transcripts.
This procedure known as transcriptional mutagenesis can lead to the production of mutant proteins that could be important in tumor development. The effect of a frameshift mutation is the complete alteration of the amino acid course of a protein one form of mutation is a point mutation, in which a single base is changed.
Therefore, Mutations can occur in germ-line cells or somatic cells as it affects the rate of transcription for a gene is found to be affected by a mutation.
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The rate of transcription for a gene is found to be affected by a mutation found in the promoter region for the gene.
Why is transcription affected by mutation?Hereditary disorders are typically brought on by genetic changes that alter the structure of the transcribed mRNA and the protein that it encodes, making the mRNA and/or protein unstable. However, these mutations can occasionally have comparable devastating effects on the synthesis, processing, or translation of the mRNA.
An RNA polymerase may miscode at the point of DNA synthesis and generate mutant transcripts if DNA damage in the transcribed strand of an active gene is ignored. The process of transcriptional mutagenesis can produce mutant proteins that may have a role in the growth of tumors.
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Can someone please help me with this question please
Answer: The correct answer is Choice A.
Explanation:
Using the evolutionary (phylogeny) tree, a clade is a group that shares a common ancestor. Think of it like pruning a tree branch, all of the smaller branches that share that same main trunk are in a clade. So, in the question options, we see that only choice A includes smaller branches that share the main trunk. The other choices (B, C & D) either span separate trunks or do not include all of the branches.
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Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to Canadian breeding grounds in the spring. As global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. Warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources.
How are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring?
A.
Populations will go extinct since the warblers will stop migrating to breeding grounds.
B.
Populations will be unaffected since most species can quickly adapt to effects of climate change.
C.
Populations will increase since warmer temperatures are generally beneficial to survival.
D.
Populations will decline since individuals will be less likely to successfully reproduce.
The population of blue winged warblers most likely to be affected by Populations will be unaffected since most species can quickly adapt to effects of climate change.
What is warblers effect?Warbler is at heart a vibrato effect, with additional controls that allow chorus/flange/delay type effects, as well as quite unusual hybrid sounds that aren't easily categorised.
The vibrato depth ranges from subtle modulations to extreme pitch effects. The vibrato LFO (low frequency oscillator) can be set from 0Hz to 5kHz and is controlled by 3 knobs to allow accurate control over the whole range.
The vibrato LFO shape can be selected from a variety of options and smoothly changed between them.
A 'bias' control is provided to change the effect from simple vibrato to something more like a traditional chorus or flange. Feedback can also be applied to give deeper, more resonant flanges or to produce echo effects.
Therefore, The population of blue winged warblers most likely to be affected by Populations will be unaffected since most species can quickly adapt to effects of climate change.
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Explain how a leaf obtains water for photosynthesis
Answer:
Leaves obtain water for photosynthesis from the air and the soil.
DNA is considered the blueprint of life, yet in eukaryotic organisms such as humans, it never leaves the nucleus. Which of the following is the BEST explanation for how DNA provides the code for protein synthesis in the cytoplasm?
Inside the nucleus, DNA is translated into mRNA, which then leaves the nucleus before being transcribed into proteins.
The DNA in the nucleus is transcribed into mRNA, which then leaves the nucleus and be translated into proteins at the ribosome.
The DNA in the nucleus is translated into proteins, which then leave the nucleus and enter the cytoplasm where transcription of mRNA can occur.
Under the right conditions, DNA is converted into tRNA, which then leaves the nucleus and is translated into proteins.
DNA is the blueprint of life that never leaves the nucleus but yet makes protein, so the statement saying "The DNA in the nucleus is transcribed into mRNA, which then leaves the nucleus and is translated into proteins at the ribosome" is true. The second option is true.
How does the DNA regulate the cell?Because DNA preserves the genetic content of the organism, it does not enter the cytoplasm directly to encode the protein in eukaryotes. So it transcribes the mRNA, which further goes to the cell cytoplasm and codes for the proteins with enzymes and ribosomes. In this way, DNA being in the nucleus regulates the cell and protein synthesis.
Hence, the second option is true regarding this process.
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the serous membranes that surround the lungs are called the group of answer choices synovial membranes. pulmonary membranes. mucous membranes. pleural membranes. peritoneal membranes.
The serous membranes that surround the lungs are called The pleural membrane.
What is pleural membrane?The pleura membrane is a serous membrane that folds on itself to form a two-layered membranous pleural sac.The outer layer is known as the parietal pleura and attaches to the chest wall. The inner layer, called the visceral pleura, covers the lungs, blood vessels, nerves, and bronchi. The pleura membrane consists of two thin layers of tissue that protect and cushion the lungs. The lining (the visceral pleura) wraps around the lungs and adheres to the lungs so that it does not peel off. The outer layer forms the inside of the chest wall. The pleura membrane, like the pistons in the cylinders of an engine, secretes a lubricating fluid that allows them to move freely relative to each other during ventilation. Without this fluid, breathing can be very difficult and even painful.To learn more about pleural membrane from the given link :
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Males with high fertility rates tend to _______. Select both answers that apply.
