Answers
Answer: Here are the options.
. They are single-stranded.
2. Their reverse transciptase has no proofreading capability
3. Their genetic material is RNA.
4. They disrupt the immune response.
The correct answer is because Their reverse transcriptase has no proof reading capability.
Explanation:
Retrovirus is a type of RNA that replicate it's copy and put it in the host cell DNA, there by changing it's genome. Retrovirus mutate at high rate in vivo viral replication. And this mutation in retroviruses may occur at different stages like during proviral transcription by RNA polymerase II, during minus-strand DNA synthesis (RNA template) by viral reverse transcriptase, or during plus-strand DNA synthesis (DNA template) by reverse transcriptase.
Retrovirus exhibit a high mutation rate. Polymerization errors during DNA synthesis by reverse transcriptase, has no proof reading capability, is a major method for generating genetic variation within retroviral populations.
Related Questions
In tomatoes, red fruit (R) is dominant to yellow fruit (r). Cross a homozygous dominant fruit with a heterozygous fruit. What percentage will the offspring have yellow fruit?
Answers
The percentage of offspring that will have yellow fruit if a homozygous dominant (RR) fruit is crossed with a heterozygous (Rr) fruit is 0%.
What is a punnet square?A punnet square is the graphical representation used to determine the probability of an offspring expressing a particular genotype.
According to this question, in tomato plants, red fruit (R) is said to be dominant to yellow fruit (r). This means that the homozygous dominant genotype will be RR while the heterozygous fruit will have a genotype of Rr.
Hence, if a cross between RR (red) × Rr (red) occurs, the following offsprings will be produced:
RRRRRrRrBased on the above genotype of the offsprings, it can be observed that none of them have a yellow fruit phenotype, hence, the percentage will be 0%.
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Order the steps of glycogen synthesis. Not all descriptions accurately describe glycogen synthesis; therefore, not all the descriptions will be used; four of the descriptions will be used in the correct answer.
UDP-glucose pyrophosphorylase catalyzes the reaction of glucose-1-phosphate and UTP to UDP-glucose and PPi
Pyrophosphatase converts PPi and water to two Pi
Glycogen synthase adds a glucose unit from UDP-glucose to glycogen, producing a larger glycogen molecule and UDP
Glycogen synthease added a glucose unit from ADP-glucose to glycogen, producing a larger glycogen molecule and ADP
Glycogen synthase catalyzes a phosphorolysis reaction
Branching enzyme catalyzes transfer of 7 glucose units from a branch to form a new alpha 1 --> 6 branch.
Order the steps of glycogen synthesis. Not all descriptions accurately describe glycogen synthesis; therefore, not all the descriptions will be used; four of the descriptions will be used in the correct answer.
Answers
Glycogen is a branched polymer and the storage form of carbohydrates in the human body.
The main storage sites are the liver and skeletal muscle. Glycogen is the main source of energy during fasting or between meals. Glycogen provides energy for up to 18 hours, after which energy needs are met by the oxidation of fatty acids.
The 2 metabolic pathways of glycogen are glycogenesis (glycogen synthesis) and glycogenolysis (glycogen breakdown). The main regulatory enzymes in these processes are glycogen synthase (in glycogenesis) and glycogen phosphorylase (in glycogenolysis).
These pathways occur as a function of the energy needs of the cells, generally modulated by hormonal and allosteric regulators.
Abnormal accumulation of glycogen occurs with enzyme deficiencies, which cause different types of glycogen storage disorders.
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This is not a test question.What will happen regarding the cell's response?
Answers
As the radius of a cell increases, its surface area increases as the square of its radius, but its volume increases as the cube of its radius (much more rapidly). Therefore, as a cell increases in size, its surface area-to-volume ratio decreases.
Answer: First option
RNA location :) (biology)
Answers
Answer:
Ribonucleic Acid (RNA) is found mainly in the cytoplasm of the cell although it is usually synthesized in the nucleus.
Explanation:
_____ are a collection of infected hair follicles that often occur on the back of the neck, the upper back, and lateral thighs that form a mass that evolves into an erythematous, painful, edematous mass, which drains through many openings.
a. Erysipelas
b. Furuncles
c. Carbuncles
d. Boils
c. carbuncles
Answers
(c) Carbuncles are a collection of infected hair follicles that often occur on the back of the neck, the upper back, and lateral thighs that form a mass that evolves into an erythematous, painful, edematous mass, which drains through many openings.
Hair follicles are a small tube like opening or pore that inhabit the roots of the hair strand. The top two layers of the skin together form the hair follicle. Around 20 types of cells together form the hair follicle.
Erythematous refers to the redness of the skin or the mucous membrane due to the accumulation of blood in the dilated capillaries of that region. The condition can arise either due to some injury or due to infection.
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Why there were no clear zones for using LB media with 1% olive oil for screening lipilytic bacteria
Answers
The reason for the clear zone may be that there is Insufficient lipolytic activity.
Why the clear zone?The absence of clear zones when using LB media with 1% olive oil for screening lipolytic bacteria could be due to Insufficient lipolytic activity.
Enzymes called lipases, which are produced by lipolytic bacteria, break down fats and oils. It's possible that the bacteria utilized in the experiment won't create lipases or have poor lipolytic activity, which would prevent them from efficiently hydrolyzing the olive oil in the media. There wouldn't be any observable clearing or lipid hydrolysis zones as a result.
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Bleeding from a small cut soon stops due to the release of
enzymes from
1) Platelets
2) Activated Antibodies
3) Hemoglobin
4) White blood cells
Answers
Answer: 4) white blood cells
Explanation:
The bleeding from a small cut soon stops due to the release of platelets. Hence, option 1 is the correct answer. These are cell fragments of megakaryocytes.
What is a blood clot?When there is a cut, blood comes out of that organ. To prevent blood loss, the body has certain mechanisms. This mechanism is called blood clotting.
In the blood, different cells are present. Red blood cells (RBC), white blood cells (WBC), and megakaryocytes are present in the blood. The red blood cells supply oxygen to the different tissues. It consists of hemoglobin. The white blood cells protect the body from pathogens. Eosinophils, neutrophils, basophils, monocytes, etc. are white blood cells ( WBC)
Megakaryocytes are the cells that form platelets. These platelets are cell fragments of megakaryocytes. When a cut occurs, these platelets come to the site along with other clotting factors such as fibrinogen to form a network-like structure. Due to this network, the blood cells can't come out, and blood loss stops.
Hence, option 1 is the correct answer as platelets prevents the blood loss. Other options are incorrect.
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Determine if each factor is biotic or abiotic.
grasshopper
pond water
dead tree
soil
fungus
temperature
Answers
Abiotic
Abiotic
Biotic
Biotic
Biotic
Answer:1.biotic
2.abiotic
3.biotic
4.abiotic
5.biotic
6.abiotic
Explanation:
radical mastectomy, once a common treatment for breast cancer, involved removal of the pectoralis major along with the breast. What functional impairments would result from this? What synergists could a physical therapist train a patient to use to recover some lost function?
Answers
Historically, the pectoralis major and the breast were both removed during a radical mastectomy, a standard treatment for breast cancer. What a functional disability.
What kind of functional damage follows a radical mastectomy?After a mastectomy versus a breast-saving procedure, lymphoedema of a upper limb and restricted shoulder movements are more frequent (3, 6, 8). 18–23% of patients have been observed to have upper limb muscle weakness (10–12). Patients have weakness in 13% of cases two years following surgery (5).
When having a radical mastectomy, which muscles are cut out?extreme mastectomy The muscles of the chest wall under the breast, the entire breast, and all lymph nodes underneath the arm are all removed. Radical mastectomy remained the most popular type or breast cancer surgery for a long time, but it is now rarely performed.
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Please select the word from the list that best fits the definition
Principle that involves an attempt to understand the meanings individuals attach to their actions.
Answers
Verstehen is the principle which involves the attempt for the understanding of the meanings individuals attach to their actions.
Principle that involves an attempt to understand the meanings individuals attach to their actions.?This idea is based on the German philosophical notion of Verstehen, which also serves as the foundation of sociology as a field of study of people and their behaviour.
The word itself exhibits the quality of deeply understanding something, which makes the method appropriate for sociologists and turns it into a means of learning about people and the acts that they take.
Weber suggested doing this, when one tries to put themselves in other people's shoes and see things from their perspective. The concept and practise of verstehen is today recognised as being essential to rejecting positivist social science (although Weber appeared to think that the two could be united). Understanding the purpose of an action is referred to as verstehen.
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The idea of comprehending the meanings people give to their acts is known as verstehen.
What is verstehen principle?A philosophy that makes an effort to comprehend the meanings people give to their activities.
This approach is based on the idea of Verstehen from German philosophy, which also serves as the basis for sociology as a discipline that studies people and their behavior.
The approach is excellent for sociologists because the word itself conveys the quality of deeply comprehending something, which transforms it into a way of learning about people and the actions they take.
When one tries to put themselves in other people's shoes and see things from their perspective, Weber advised doing this. Today, the idea of comprehension and its application are recognized as
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Discuss the importance of data when observing something like the outbreak of cholera or even the outbreak of COVID-19, when using the scientific method.
Answers
Data is crucial when observing outbreaks of diseases like cholera and COVID-19 because it helps identify patterns and trends in the spread of the disease. In order to understand the epidemiology of a disease, scientists need to collect and analyze data on factors such as the number of cases, the location of cases, etc.
During the cholera outbreak in London in 1854, physician John Snow collected data on the location of cholera cases and the source of their drinking water. By mapping the cases and the water sources, Snow was able to identify a contaminated water pump as the source of the outbreak. His data-driven approach helped to establish the link between contaminated water and the spread of cholera and led to improved sanitation practices that reduced the incidence of the disease. Similarly, during the COVID-19 pandemic, data on the number of cases, hospitalizations, and deaths has been critical in tracking the spread of the disease and informing public health responses.
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Which choice best summarizes the outcome of Redi’s experiment?
Answers
The best summary of the outcome of Redi's experiment is that the experiment provided evidence against spontaneous generation by demonstrating that maggots do not spontaneously generate from decaying meat when it is isolated from flies.
Francesco Redi conducted an experiment in the 17th century to challenge the prevailing belief in spontaneous generation, which proposed that living organisms could arise spontaneously from non-living matter.
In his experiment, Redi set up two groups of jars containing meat. One group was covered with gauze to prevent flies from accessing the meat, while the other group was left uncovered.
Over time, Redi observed that maggots appeared only in the uncovered jars where flies had access to the meat, while the covered jars remained free of maggots.
This led Redi to conclude that maggots were the offspring of flies and did not arise spontaneously from the meat.
His experiment provided empirical evidence against the theory of spontaneous generation and contributed to the development of the concept of biogenesis, which states that living organisms come from pre-existing living organisms.
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In what region is most of the
animal wildlife found in Africa?
A. Desert
B. Semi-desert
C. Savanna
D. Forest-tundra
Answers
what is produced inside the nucleus during transcription that make it possible to move genetic information outside the nucleus?
A. DNA
B. mRNA transcript
C. Proteins
Answers
Answer:
b
Explanation:
mRNA transcript
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Which of the following is likely to cause human immigration into a region?
I. Job opportunities in the new region
II. Lower possibility of persecution in the new region
III. Less environmental disruption in the new region
- I only
- II only
- I and III
- I, II, and III
Answers
The reasons that are likely to cause human immigration into a region are as follows:
I. Job opportunities in the new region III. Less environmental disruption in the new region WHAT IS IMMIGRATION?Immigration refers to the movement of individuals of a population into a new country or region.
Immigration can be caused by varying reasons, which are often centered around better offers and opportunities. Some of these reasons include;
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Answer:
Its D
Explanation:
I took the test and got it right
Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music
What can Carmen do to make her experiment more reliable?
A. add another variable to test
B. repeat the experiment several times
C. decrease the amount of time the test subjects are exposed to the music
D. putting each test subject in a different location while they listen to the music
Answers
The saccharide shown here is present in some plant-derived foods.
(a) Indicate the anomeric carbon atom(s) in this structure by drawing a circle around the atom(s) or by drawing an arrow pointing to the atom(s).
(b) Would this saccharide give a positive result with Benedict’s reagent? Why or why not?
(c) Would this saccharide give a positive result with Barfoed’s reagent? Why or why not?
Answers
This saccharide would not give a positive result with Benedict's reagent, but Barfoed's reagent would due to its free reducing sugar group. Its foundation is the transformation of copper acetate into copper oxide, which precipitates as a brick-red substance.
Is sucrose equivalent to sugar?Sugar, the familiar and beloved simple carbohydrate that is generated organically in all plants, particularly fruits, vegetables, and even nuts, is known chemically as sucrose. According to an University of Pennsylvania, Davis research that was published in the International Journal of Clinical Endocrine and Metabolism, sucrose, the more "natural form of sugar," may be just as harmful to your health as HFCS.
a) The anomeric carbon atoms in this structure are circled.
b) This saccharide would not give a positive result with Benedict's reagent as it does not contain an aldehyde functional group.
c) This saccharide would give a positive result with Barfoed's reagent, because it contains a free reducing sugar group.
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explain how capillaries are adapted for their function
Answers
The capillaries are adapted to their functions because their walls are just a cell thick making it possible for exchange to occur.
What is a capillary?A capillary is defined as the type of blood vessels that is found all over the body which is the smallest type of blood that allows the transport of blood, nutrients and oxygen to cells in organs and body systems.
The physiological structure of the capillaries helps in the adaptation of their functions because they are just a cell thick which is not so for veins and arteries of the vascular system.
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Homologous chromosome are paired.
Answers
Homologous chromosomes are paired because they carry the same genes in the same order, although the alleles for each trait may differ.
During meiosis, the homologous chromosomes align during prophase I and exchange genetic material through a process called crossing over, which contributes to genetic diversity.In human beings, a pair of homologous chromosomes is present in every cell, one from each parent.
In females, the two X chromosomes are homologous pairs, while in males, the X and Y chromosomes are not homologous pairs since they carry different genes. During fertilization, the homologous chromosomes from the two parents pair up, and each gamete contains only one of each homologous chromosome.
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Write the number of offspring plants with each phenotype in the Offspring Phenotype columns. Also, make sure you have run enough trials that you can both determine the genotype of each parent plant and produce yellow and white-flowered plants.
Summarize your work on the next page.
Answers
If you could provide more details about the experiment, I would be happy to help you with your analysis and summary.
What is enzyme specificity?
Answers
Answer:
This is the tendency of enzymes to catalyse a specific set of chemical reactions.
Explanation:
This is enzyme specificity.
How many nitrogen atoms are there in 3 molecules of N2H4
Answers
In one molecule of N2H4 (Hydrazine), there are two nitrogen atoms.
So, to find how many there are in five molecules, multiply by five.
2 x 5 = 10
What are atoms?
An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.
Moreover, an atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons.
Hence, the nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
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PLS HELP THIS IS FOR A GRADE I WILL GIVE BRAINLYEST
1. As a result of deforestation, a forest environment changes to a desert environment. Identify the trait that is most likely to be naturally selected as a result of the environmental change described.
A. A nocturnal schedule
B. The ability to climb trees
C. A spotted coat
D. Thick fur
2. Which of the following describes the effects of natural selection on the traits of finch species of the Galapagos Islands?
A. The finch species on different islands all have very similar beak lengths and widths.
B. Each finch species evolved a beak that suits its island environment and food source.
C. The finch species on the different islands evolved long thin beaks to survive on the small seeds of the Galapagos.
D. Individual finches within each species evolved different beaks to contribute to genetic variation.
3. The polar bear lives within the Earth’s northern polar region. Unlike other bears who live on land, polar bears spend most of their time roaming the sea ice in search of food. It is here on the sea ice they hunt the major food source, the sea lion. Because of their dependence on the sea ice, polar bears are classified as marine mammals. As the sea ice is melting due to global warming, the polar bear is now considered a vulnerable species.
If this trend continues, which statement describes how the polar bear be affected?
A. They will have to hibernate longer.
B. They will be easier targets for predators.
C. They will live in the water instead of on land.
D. They will either adapt, migrate, or become extinct.
4. Saber Tooth Tigers were predatory mammals known for their large protruding saber-like teeth. They lived on the American Grasslands for over 40 million years. Saber Tooth Tigers are a member of a group of animals called “Megafauna.” Scientists believe their food sources were large herbivores. At the end of the last ice age (10,000 yrs. ago), they became extinct.
From the information given, what is the probable reason the Saber Tooth Tiger did not survive into modern times?
A. The Saber Tooth Tigers suffered from disease.
B. The Saber Tooth Tiger exhausted its food source.
C. The Saber Tooth Tiger could not adapt to environmental changes.
D. The Saber Tooth Tiger was hunted to the point of extinction by predators.
5. An oasis in a desert was very swampy. Two different species of frogs lived in the swamp. A chemical was spilled in the swamp. Some of the chemical is still found in the swamp. One frog species is now extinct. The species that survived is still found in the swamp. The surviving species probably had the ability to –
A. Move far away
B. Eat different insects
C. Adapt to the Chemical
D. Reproduce in high numbers.
Answers
Answer:
1) A- a nocturnal schedule, since animals in deserts stay cool during the night.
2) D- individual species evolved different beaks to contribute to genetic variation.
3) D- they will adapt, migrate, or become extinct. An adaptation example is getting shorter fur.
4) D- hunted to extinction. Humans probably valued their unique teeth.
5) C- adapt. If it didn't die, something in its genetics probably caused this.
Brainliest would be really cool, hope this helps! Sorry if any are wrong.
Jane is doing an experiment to find out how the size of a bowl affects the growth of the goldfish living in that bowl. She has three identical goldfish. She puts them in three bowls of different sizes. Every day, Jane looks at the goldfish in each bowl. In addition to looking, what should she do?
Answers
Answer:
maybe she should feed the gold fish
She should change the water she should change the container to see the change 'cuz there will be a change.
Answer:
C: Record her observations each day
Explanation:
I got it correct.
Which of the following is NOT an example of
a convergent boundary?
A. continental crust to continental crust collision
B. mantle to core collision
C. continental crust to oceanic crust collision
D. oceanic crust to oceanic crust collision
Answers
Answer:
C. Continental is not technically a convergent boundary since there is no definite overlap, although it should be noted that this is not always the case.
Explanation:
I took the K12 test
Answer: B. mantle to core collision
Explanation:
look up chasing coral full feature netflix on YT to answer these few questions i posted three posts today on here i need them answered correctly please
Answers
Corals glow because they contain tiny algae called zooxanthellae. These algae live inside the coral's tissues and provide the coral with food and oxygen.
How to explain the information
In return, the coral provides the algae with a safe place to live and carbon dioxide. When the water temperature gets too warm, the algae start to die. This causes the coral to lose its food source and turn white, a process called bleaching.
If we don't take action to reduce greenhouse gas emissions, the oceans could be too warm for any corals to survive in as little as 30 years.
About half of the coral reefs on the Great Barrier Reef have died in the past 30 years.
Richard is optimistic because he believes that we can still save the coral reefs if we take action to reduce greenhouse gas emissions and protect coral reefs from other threats such as pollution and overfishing.
One way that you can immediately help save the corals is to reduce your carbon footprint.
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Can Tatar come off your teeth?
Answers
Answer:
Once tartar has formed, only a dental professional will be able to remove it from your teeth. So, visit your dentist every 6 months to remove any plaque and tartar that might have formed and to prevent further problems.
Explanation:
You are a farmer starting an orchard and interested in breeding citrus trees. In grapefruits, big fruit (B) is dominant over small fruit (b), and silky skin (S) is dominant over rough skin (s). You cross a homozygous tree that has big fruit and silky skin, with a homozygous tree that has small fruit and rough skin. You self-cross the F1 to produce the F2.
Required:
a. What will be the phenotypic ratios in the F2?
b. If you backcross an F1 tree with the big, silky skin parent, what phenotypes and proportions would you expect in the offspring?
c. If you backcross an F1 tree with the small, rough skin parent, what phenotypes and proportions would you expect in the offspring?
Answers
Type the correct answer in the box. Spell all words correctly.
What is a close relationship between two organisms that live together called?
The close relationship between two organisms that live together is called
Reset
Next
Answers
Answer:
symbiosis.
Explanation:
The term that you are referring to is symbiosis. (a symbiotic relationship)
Symbiosis is a proximate and often long-term interaction between two or more different biological species.
contact lens solution is salty in order to match your tears