Question 9 of 25
How does a cell's history affect the benes expressed by the cell?
OA. All of the genes contained in a cell must be expressed as soon as
the cell forms so it can differentiate.
OB. Internal and external conditions determine which genes are turned
on or off as the cell develops.
C. The genes that are turned on when a cell is developing are the only
genes that will be expressed during the cell's life.
D before a cells divides, unnecessary genes are removed from its chromosomes so the new cell will express only the remaining genes
Answers
Which genes are turned on or off as the cell develops depends on both internal and external factors. Genes regulation is a mechanism wherein the past of a cell can influence the genes that are produced by the cell.
How do cellular functions change as a result of a gene sequence?Proteins are controlled by genes, which determine how cells function. Thus, the millions of genes that are expressed in a certain cell determine the capabilities of that cell.
Why don't all of the genes in a cell's genome express themselves at once, only a subset of the genes that do?Additionally, because DNA must be unwound from its tightly coiled shape in order to be translated and transcribed, only a portion of the genes are expressed by each cell. This conserves space.
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Answer: B is the correct answer
Explanation:
I did the test and got it correct
Related Questions
what rbc morphology on a wright-stained smear may indicate the presence of an unstable hemoglobin?
Answers
The presence of unstable hemoglobin on a Wright-stained smear may be indicated by the presence of Schistocytes.
A Wright-stained smear is a laboratory technique used to visualize different types of blood cells under a microscope. It uses a combination of eosin and methylene blue dyes that bind to different components of the cells, allowing for the identification of different types of white blood cells, red blood cells, and platelets.
Schistocytes are fragmented red blood cells (RBCs) that appear as small, irregularly-shaped cells on a blood smear. They are typically seen in conditions such as hemolytic anemia, disseminated intravascular coagulation (DIC), and mechanical hemolysis (e.g., from a mechanical heart valve).
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Can chronic diseases be treated?
Answers
Surgery, physiotherapy, psychotherapy, and radiation therapy are just some of the options available for treating chronic diseases.
In most cases, chronic diseases can be managed, but not cured, over the long term. In addition to dealing with acute health problems and complications that can shorten life expectancy, people with chronic illnesses frequently deal with daily symptom management that negatively impacts their quality of life.
Medication, however, is a common treatment option. Medication costs are a major part of health care spending in Australia and other developed countries, accounting for 13% of the total in 200607.4 In 2008, 4 billion prescriptions were filled, and many of these were for long-term conditions. Prevention and management of chronic diseases, especially when multiple medications are required, can be taxing.
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Write an essay describing your chosen genetic disorder. Include information about the genetic mutation that cause the disorder the effects and symptoms of the mutation how it is acquired and how common it is
Answers
A genetic disease is a condition that, entirely or in part, results from a change in the usual DNA sequence.
Sickle cell anemia is one of the inherited illnesses. The structure of red blood cells, which carry oxygen to every part of the body, is impacted.Typically rounded and flexible, red blood cells may flow through blood veins with ease. Sickle cell anemia is characterized by red blood cells having crescent-shaped or sickle-shaped hemoglobin. These sickle cells also form a tough, sticky covering that may slow or prevent blood flow. Cause: A mutation in both copies of the hemoglobin-Beta gene (HBB) gene on chromosome 11 results in the hereditary illness sickle cell disease (SCD). An element of hemoglobin, the protein in red blood cells that carries oxygen, is encoded by this gene. Because of the mutation, hemoglobin molecules clump together to form red blood cells with a sickle shape.Symptoms: Anemia, Periodic episodes of extreme pain, Swelling of hands and feet, Frequent infections, Delayed growth or puberty and Vision problems.You receive 1 set each from your father and mother as inheritance. A kid must receive a copy of the sickle cell gene from both of its parents in order to be born with sickle cell disease. This often occurs when both parents have the sickle cell trait, commonly known as being "carriers" of the sickle cell gene.Learn more about the Genetic disorder with the help of the given link:
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3. The action of the decomposers leads to loss of food items. Explain, how nature
benefits from the same action.
Answers
Nature benefits from the same action are Biodegradation.
What is a Biodegradable substance?Biodegradable is a substance which is capable of being decomposed by bacteria or other living organisms.
Example: plants, dead animals
A pollutant is a substance that when introduced into the environment has adverse effects on the environment or people.
Thus, this could be the answer.
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3. Name the division of the peripheral nervous system that is activated in each of these
examples:
a. You are startled when a friend pulls a practical joke and spooks you with a loud sound.
b. You move your arms and legs to take an evening walk.
c. Your stomach makes a gurgling sound as it digests your lunch.
d. Feeling a little stressed? You take a few breaths to calm down.
e. You are at the line, waiting for you race to start, and your heart begins to pound.
Answers
A startle reflex (a), digestion (c), breathing (d) and heart pumping (e) are responses of the ANS, while arm/leg movement (b) is a response of the SNS. They are major divisions of the PNS.
The peripheral nervous system (PNS) serves to connect the central nervous system to different organs, limbs, and skin.
The PNS can be divided into Somatic Nervous System (SNS) and Autonomic Nervous System (ANS).
The Somatic Nervous System is responsible for controlling the voluntary movements of the body.
The Somatic Nervous System is responsible for regulating the involuntary movements (reflexes) of the body.
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How does most of the carbon in an organism's body return to the
environment after the organism dies?
A. Decomposers break the body down into simpler compounds.
B. Heat from the sun causes the carbon in the body to evaporate.
C. Geological processes cause the body to turn into a fossil fuel.
D. Rainwater dissolves the carbon in the body and carries it to the ocean.
Answers
Answer:
Decomposers break the body down into simpler compounds.
9. Which of the following is a natural pesticide that's sometimes applied to organic crops?
O A. Organophosphates
OB. Nitrogen
C. Neem oil
D. Nitrate
Answers
Neem oil is a natural pesticide that's sometimes applied to organic crops because of its repellent composition.
What is natural pesticides?Natural pesticides are those pesticides that are made for their own defense by organisms such as plant, animal, bacteria. Neem has long been used for its medicinal and culinary properties.
So we can conclude that Neem oil is a natural pesticide that's sometimes applied to organic crops because of its repellent composition.
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Neem oil is a natural pesticide that is sometimes applied to organic crops
C. Neem oil
What is neem oil used for in agriculture?It is a product to control the populations of undesirable insects in agriculture, being harmless to humans and warm-blooded animals. It is fully biodegradable and does not bioaccumulate.
With this information, we can conclude that Neem oil is a natural pesticide that is sometimes applied to organic crops
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what is the diagnostic term for the condition that results whenever the tissue surrounding the kidney fails to anchor it to nearby structures and the kidney droops?
Answers
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Energy consumed in the United States can be classified as coming from one of three sources: fossil fuels, nuclear and electric power, and renewable energy. In 2018, the energy from these three sources was 81.0, 8.4, and 11.5 quadrillion Btu. respectively. In 2008, the corresponding amounts were 83.0, 8.4, and 7.2. (Ref: eia.gov/total energy)
Renewable energy is classified into five sources. Here are the 2008 and 2018 energy data for these sources:
Amount
Source 2008 2018
Hydroelectric 3.511 2.688
Geothermal 0.192 0.218
Solar 0.074 0.951
Wind 0.546 2.533
Biomass 3.851 5.132
Discuss the changes from 2008 to 2018. Which of the graph types we have looked at will be useful in reporting the data and the changes?
Answers
The changes in renewable energy sources in the United States from 2008 to 2018 show significant growth in solar, wind, and biomass energy, while hydroelectric energy decreased. Bar and line graphs would be useful in reporting these changes.
The changes in renewable energy sources from 2008 to 2018 in the United States indicate a significant shift towards a more diverse and sustainable energy portfolio. The data shows a decrease in hydroelectric energy production from 3.511 quadrillion Btu in 2008 to 2.688 quadrillion Btu in 2018. Geothermal energy remained relatively stable with a slight increase from 0.192 quadrillion Btu to 0.218 quadrillion Btu. However, solar energy experienced a substantial growth from 0.074 quadrillion Btu to 0.951 quadrillion Btu, indicating a significant increase in its utilization. Wind energy also showed remarkable growth, with production increasing from 0.546 quadrillion Btu in 2008 to 2.533 quadrillion Btu in 2018. Biomass energy experienced the most significant growth among the renewable sources, rising from 3.851 quadrillion Btu to 5.132 quadrillion Btu.
These changes highlight a notable shift towards the expansion and adoption of solar, wind, and biomass energy sources. The increase in solar energy production can be attributed to technological advancements, cost reductions, and increased investments in solar infrastructure. Similarly, the growth in wind energy can be attributed to the installation of more wind turbines and improved efficiency in capturing wind power. The significant increase in biomass energy reflects the utilization of organic materials and waste for energy generation.
To report these changes effectively, a combination of bar graphs and line graphs can be used. A bar graph can be employed to compare the energy production of different renewable sources in 2008 and 2018, highlighting the absolute values for each source. A line graph can complement the bar graph by illustrating the trend and growth of each renewable source over the ten-year period, emphasizing the relative changes in energy production.
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Which step of mitosis involves the nucleus splitting and nuclear membranes forming around each new nucleus?
metaphase
prophase
anaphase
telophase
Answers
Answer:
d/ telophase
Explanation:
A patient got infection with an unknown bacteria. The microbiologist from the pathological lab isolated the causative bacteria which can be called as a. Psychrofiles b. Barophiles c. Thermophiles d. Mesophiles
Answers
The microbiologist from the pathological lab isolated the causative bacteria which can be called mesophiles (Option D).
Cаusаtive agent meаns аny virus, bаcterium, fungus, pаrаsitic аgent or microorgаnism which is directly or indirectly responsible for cаusing the аpplicаble diseаse. The causative bacteria isolated from the patient's infection could be classified as psychrophiles, barophiles, thermophiles, or mesophiles. These terms refer to different categories of bacteria based on their preferred environmental conditions. Further analysis and testing would be needed to determine the exact classification of the isolated bacteria.
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.At what stage of the cell cycle is the cyclin component of MPF destroyed?
A) in late G1
B) at mid-S phase
C) in early G2
D) in late M
Answers
The cyclin component of MPF is destroyed at the late M stage of the cell cycle. So option (D) is correct answer.
MPF stands for mitosis-promoting factor, which is a complex of protein and plays a vital role in regulating mitosis during the cell cycle. In the cell cycle, there are four stages that include G1 phase, S phase, G2 phase, and M phase. The M phase consists of mitosis and cytokinesis, while the other three stages are known as interphase. In the late M phase, the cyclin component of MPF is destroyed.
Cyclin is a regulatory protein that helps in the regulation of the cell cycle. The concentration of cyclin increases during the S and G2 phases and reaches its maximum level at the onset of mitosis. After that, the concentration of cyclin falls rapidly because of the degradation of cyclin. Therefore option (D) is correct answer.
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Cyclin is destroyed by ubiquitin-mediated proteolysis in the late M phase of the cell cycle, leading to the inactivation of MPF and the progression of mitosis. Here option D is the correct answer.
Cyclin is a protein that binds to cyclin-dependent kinase (CDK) to activate it, causing the cell to move into the next stage of the cell cycle. Cyclin concentration fluctuates during the cell cycle.
MPF is a kinase that is required for the transition from the G2 phase to the M phase of the cell cycle. Mitosis-promoting factor (MPF) is the primary factor that regulates the progression of cells from the G2 phase to the M phase.
Cyclin is a protein that binds to and activates CDK, forming MPF. During mitosis, the cyclin component of MPF is destroyed by ubiquitin-mediated proteolysis. Therefore, the correct answer is option D) in late M phase of the cell cycle.
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Light colored moths found in industrial area with dark vegetation
Answers
Scientists have discovered the specific mutation that famously turned moths black during the Industrial Revolution. In an iconic evolutionary case study, a black form of the peppered moth rapidly took over in industrial parts of the UK during the 1800s, as soot blackened the tree trunks and walls of its habitat.
Answer:
Light Colored Peppered Moths
The _____ is a large, round body within the cell that contains the cellular genetic components (genes).
Answers
The nucleus is a large, round body within the cell that contains the cellular genetic components (genes).
What is nucleus?In terms of genomics, a nucleus is the organelle within a cell that is membrane-enclosed and houses the chromosomes. Therefore, protecting this component of the cell is very critical. The chromosomes are all kept inside the nucleus by a membrane, which also distinguishes between the chromosomes being inside the nucleus and the other organelles and parts of the cell remaining outside. There are pores in the nuclear membrane that allow molecules to enter and exit the nucleus as necessary, such as when RNA needs to move between the nucleus and the cytoplasm. Previously, it was believed that the nuclear membrane only allowed molecules to enter and exit the nucleus; however, it is now understood that there is an active process for bringing molecules into the nucleus as well.Learn more about the Nucleus with the help of the given link:
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sam and diane are carriers of the recessive allele causing tay-sachs disease, which is lethal in early childhood. if they have a healthy child, what is the percent chance that this child is not a carrier of tay-sachs disease?
Answers
The chances of Sam and Diane's healthy child not carrying Tay-Sachs disease will be 75 percent.
The Tay-Sachs infection is caused by a change in the HEXA gene. Tay–Sachs illness is an autosomal passive hereditary clutter, meaning that when both guardians are carriers, there's a 25% hazard of giving birth to an influenced child with each pregnancy.
A changed duplicate of the quality is passed from each parent to the influenced child. The causes are hereditary.
Tay-Sachs disease is a metabolic hereditary clutter that appears a dynamic weakening of mental and physical capacities due to nerve harm in the brain and spinal rope. It comes about in loss of muscle control and the long run, leads to visual impairment, loss of motion, and passing.
In this case, Sam and Diane have the recessive alleles for Tay-Sachs disease, so the healthy baby will have a 75percent chance of not having the disease.
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the concentration of carbon dioxide in the atmosphere has been increasing for many years, how might this increase affect photosynthesis
Answers
Answer:
the answer is
Carbon dioxide concentrations are rising mostly because of the fossil fuels that people are burning for energy.Increasing the light intensity increases the rate of photosynthesis, until some other factor a limiting factor becomes in short supply. At very high light intensities,photosynthesis is slowed and then inhibited, but these light intensities do not occur in nature.
Explanation:
Please help me someone help
Answers
Answer: I think that it would be C but I'm not completely positive :) either way, I hope this can help out on whatever you're working on
How are soluble food molecules absorbed into the epithelial cells of the small intestine
Answers
Soluble food molecules are absorbed into the epithelial cells of the small intestine through the process of diffusion and active transport.
a tropic hormone is any hormone that a. stimulates or suppresses the release of posterior pituitary hormones. b. increases reproductive behavior. c. stimulates or suppresses the release of other hormones. d. influences the ovaries and testes. e. is released by the pituitary gland.
Answers
A tropic hormone is any hormone that stimulates or suppresses the release of other hormones.
What is tropic hormone?Tropic hormones are hormones of the anterior pituitary gland. These hormones influence the growth, function, or nutrition of other endocrine cells.Tropic hormones are found in body systems including the endocrine, gastrointestinal, urinary, and nervous systems.Tropic hormones are released from one endocrine gland and act on another. Tropic hormones stimulates the growth of target tissues. They can lead to hypertrophy or hyperplasia. Most tropic hormones are produced and secreted by the anterior pituitary gland. The hypothalamus secretes trophic hormones that target the anterior pituitary gland, and the thyroid secretes thyroxine, which targets the hypothalamus, and thus can be considered trophic hormones. Tropic hormones act indirectly on target cells by first stimulates other endocrine glands. Corticotropin-releasing hormone (CRH) is released from the hypothalamus and stimulates the anterior pituitary gland to release adrenocorticotropic hormone (ACTH).To learn more about tropic hormone from the given link :
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In the process of protoplast fusion, cells are grown in a medium that contains. A. DNA ligases. B. lysozyme for bacteria. C. chitinase for yeast. D. RNAses
Answers
In the process of protoplast fusion, cells are grown in a medium that contains lysozyme for bacteria or chitinase for yeast.
These enzymes break down the cell wall of the cells, leaving the protoplasts, which are cells that have had their cell walls removed. The protoplasts can then be fused together using chemical or electrical methods, allowing the genetic material from two different cells to combine into a single cell. The resulting hybrid cell can then be grown and studied to investigate the effects of the combined genetic material.
The medium used to grow the cells during protoplast fusion usually contains nutrients and other factors necessary for cell growth and division. It does not typically contain DNA ligases, which are enzymes used to join together two pieces of DNA.
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What protein does the sonic hedgehog gene encode
Answers
Answer:
Normal Function. The SHH gene provides instructions for making a protein called Sonic Hedgehog. This protein functions as a chemical signal that is essential for embryonic development. Sonic Hedgehog plays a role in cell growth, cell specialization, and the normal shaping (patterning) of the body.1
what do we depend on the environment for?
Answers
stable climate
shelter
water
Meiosis II must take place because each of our new cells still has too much _________.
Answers
(Hope this helps!!)
which of the following statements about bacteriocins is false? group of answer choices bacteriocins kill bacteria. the genes coding for them are on plasmids. they can be used to identify certain bacteria. nisin is a bacteriocin used as a food preservative. they cause food-poisoning symptoms.
Answers
The false statement about bacteriocins is:
"They cause food-poisoning symptoms."
What are bacteriocins?Bacteriocins are described as antimicrobial peptides or proteins produced by bacteria that can kill or inhibit the growth of other bacteria.
Bacteriocins are used by bacteria as a defense mechanism against competition from other microorganisms and have been approved for use as food preservatives due to their ability to control foodborne pathogens.
In conclusion, bacteriocins themselves do not cause food-poisoning symptoms.
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A red bloom cell has diameter of 0.008mm. a model of the red blood cell has a diameter of 80mm. What is the scale of the model
Answers
Scale of the model: 1:10,000. To find the scale of the model, we need to compare the size of the model to the actual size of the red blood cell. Given that the diameter of the red blood cell is 0.008mm and the diameter of the model is 80mm, we can calculate the scale by dividing the diameter of the model by the diameter of the actual cell.
Scale = Model diameter / Actual cell diameter
Substituting the given values:
Scale = 80mm / 0.008mm
Simplifying the expression:
Scale = 10,000
Therefore, the scale of the model is 1:10,000.
1. Identify the diameter of the red blood cell: 0.008mm.
2. Identify the diameter of the model: 80mm.
3. Use the formula Scale = Model diameter / Actual cell diameter.
4. Substitute the values into the formula: Scale = 80mm / 0.008mm.
5. Simplify the expression to find the scale: Scale = 10,000.
6. The scale of the model is 1:10,000, indicating that the model is 10,000 times larger than the actual red blood cell.
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amino acids in a protein polymer are connected by a covalent bond called a [ select ] bond that connect the [ select ] group of the first amino acid to the [ select ] group of the second amino acid. such successive amino acid bondings generate a protein polymer called a [ select ] .
Answers
The amino acids in a protein polymer are connected by a covalent bond called a peptide bond that connects the carboxyl group of the first amino acid to the amino group of the second amino acid. Such successive amino acid bondings generate a protein polymer called a polypeptide.
A peptide bond is formed through a condensation reaction between the carboxyl group of one amino acid and the amino group of another amino acid. This bond results in the formation of a covalent linkage between the carbon and nitrogen atoms of the amino acids, creating a peptide bond. The successive formation of peptide bonds between amino acids leads to the generation of a polypeptide chain, which is the primary structure of a protein.
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What are four possible phenotypes in this dihybrid punnett square?
Answers
Using white tall (RRBB)and black short (rrbb) as an instance
Then I have white tall:9
White short:3
Black tall:3
Black short: 1
So this shows the phenotypic expression of a heterozygous with a dominant and recessive growth
The four phenotype in this dihybrid in a Punnett square is stated above as 9:3:3:1
Thanks
Which of the following statements is INCORRECT?Progesterone and estrogens maintain the lining of the uterus during pregnancy.Human chorionic gonadotropin stimulates the corpus luteum to secrete estrogens and progesterone.Relaxin increases flexibility of the pubic symphysis and ligaments of sacroiliac joints and dilates the cervix during labor.Human chorionic somatomammotropin helps to prepare the mammary glands for lactation and regulates metabolism of mother and fetus.Corticotrophin releasing hormone is thought to be involved in timing of birth and decreases greatly as birth approaches.
Answers
The incorrect option is e .Corticotrophin releasing hormone is thought to be involved in timing of birth and decreases greatly as birth approaches.
Corticotropin-releasing hormone (CRH) are responsible for controlling placental response to stress in order that the fetus can predict risk to survival and adjust with the developing environment.
Corticotropin-releasing hormone is the central regulator of the hypothalamic pituitary adrenal (HPA) axis, that organizes of the body's response to stress. CRH obtained from the placenta is responsible to maintain a crucial role in the regulation of fetal maturation and the timing of delivery, and CRH also helps in the controlling the fetal-placental blood flow.
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Is there more to life than we know?
Answers
Answer:
Most of us work at least 5 days a week and 8-10 hours a day, some of us work even more than that. ... Even though work is a big part of our time, there is more to life than work. We work so that we can live happier, fulfilled, more engaged lives.
Explanation:
Choose the correct description for each phase of mitosis.
Label A
Answers
The correct description for each for each phase of mitosis are:
phase A - The Prophase: Chromatin in the cell coils into chromosomes that can be seen.
phase B - Metaphase:
The chromosomes that were doubled become attached to the spindle fiber by their centromeres.
phase C - Anaphase :
Centromeres are split apart and sister chromatids are pulled to opposite poles of the cell
phase D - Telophase:
The Sister chromatids are separated and contain identical copies of DNA .
What is mitosis?Mitosis is described as a part of the cell cycle in which replicated chromosomes are separated into two new nuclei.
Mitosis in other terms can be described as the division process of the cell in which cell becomes divide into two equal halves each containing equal amount of DNA.
The process of mitosis division process is further divided into 4 sub_phases known as:
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