A common way by which virus vaccines are made is to introduce a mutation that makes the virus less virulent (i.e. that reduces the severity of infection) and to expose patients to that mutated virus. which sort of mutation would it be safest to introduce to ensure that the virus cannot easily revert to its original, virulent state?

Answers

Answer 1
answer: deletions

It's safer to cause a mutation by deleting the genetic information responsible for the virulence of the virus. This method is used in attenuated vaccines, where the virus is still alive but less virulent. These types of vaccines cannot be used by immunocompromised individuals.

Related Questions

Which sequence best represents the different levels of organization of multicellular organisms from least complex to most complex?

Answers

The sequence would be as follows:
cells - tissues - organs - organ system - organisms

Let's take a look at each of these levels:
Level 1: Cell
Cells are the smallest building unit of any structure within the organism. 
Level 2: Tissue
a tissue is a group of cells having the same function and structure that are bound together to perform a certain function in the body
Level 3: Organ
an organ is a group of tissues bound together to perform a certain function
Level 4: Organ system
groups of two or more organs that work together to serve a certain function in the body
Level 5: Organism
the entire living thing formed of different organ systems

• what parts of planning are most likely to require a back-up play

Answers

The results are most likely to require a back up plan.What if that plan doesn’t end how you wanted it to.you have to have a second plan to follow so you can succeed at the yak you chose

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The size of the host population controls _____.



the size of the parasite population



the size of the omnivore population



the size of the predator population



the size of the prey population

Answers

the size of the parasite population
"The size of the parasite population" Is your answer. 

This is so because none of the other answers would need a "host."

A positive sexual relationshp can
a. be a shared pleasure.
b. be a haven from everyday tensions.
c. enhance a couple's mutual understanding and caring.
d. do all of these.

Answers

D. do all of these...........

As salma views a famous impressionist painting that is hung on a wall, her ___________ receive visual information about the art and carry this information to her brain.

Answers

Answer:

The answer is sensory neurons

Explanation:

i just got it right on my test

Final answer:

Salma's retinas receive visual information from the impressionist painting and transmit it to her brain. Retinas are crucial for visual perception, which is influenced by cultural background and emotional responses.

Explanation:

As Salma views a famous impressionist painting that is hung on a wall, her retinas receive visual information about the art and carry this information to her brain. The retina is a part of the eye that contains cells sensitive to light, which convert light into electrical signals that are transmitted to the brain through the optic nerve. This biological process is at the core of visual perception, allowing Salma to experience the painting's colors, shapes, and composition.

The personal perception of art is highly subjective and varies among individuals. Our cultural background and individual experiences influence how we 'read' a piece of art. This includes not only where we begin to look at an image but also the types of information we perceive and process.

In addition to sight and cognitive processes, our emotional responses also contribute to how we appreciate art. Emotions, similar to physiological reactions such as a quickened heartbeat or widened eyes, can potentially guide or reinforce our artistic judgments.

Why do you suppose that the influenza virus protein that binds the virus to an infected cell is called hemagglutinin? hemagglutination is the clumping together of red blood cells?

Answers

Agglutination, is the state of being united, i.e the adhesion of parts.Thus, hemagglutination is adhesion of red blood cells. The protein that binds the virus to an infected red blood cell is thus called hemagglutinin, because, it binds to multiple red blood cells, causing them to clump together.

Which molecule is active during the last step of DNA replication? A) Thymine B) Helicase enzyme C) nucleotidase B) DNA ligase

Answers

the answer to this question is b. Hope this helps!! :D

the correct answer is DNA Ligase

What is the main difference between a reflex and a habit?

Answers

A reflex is a built in operation that performs without orders from your mind.
A habit is something you as a person forms and we can train our minds to stop the habit.

The main difference between a habit and a reflex is that a habit is based on a reflex, but it is completely separated from the original stimulus.

What is a Reflex and habit?

Reflexes (reflex action) are relatively simple motor responses organized by the brainstem and enables the body to adjust rapidly to sudden changes in the external environment.

A reflex, or reflex action, is an involuntary, unplanned action. It is an almost instantaneous movement in response to a stimulus. A reflex action takes place by neural pathways called reflex arcs which can act on an impulse before the impulse even reaches the brain.

A habit is a behavior that is repeated regularly and occurs subconsciously. The habit is defined from the standpoint of psychology, as a more or less fixed way of thinking, willing, or feeling acquired through previous repetition of a mental experience.

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Explain how the two main theories of color perception, initially appearing to contradict each other, are, in fact, complementary perspectives.

Answers

Final answer:

The trichromatic theory and the opponent-process theory are the two main theories of color perception. They seem contradictory at first glance, but in fact, they complement each other and explain different stages of color perception.

Explanation:

The two main theories of color perception, which initially appear contradictory, are, in fact, complementary when examined closely. These are the trichromatic theory and the opponent-process theory.

The trichromatic theory explains that our color perception is a product of the relative outputs of the three types of cone receptors in our eyes which are sensitive to different parts of the light spectrum, approximating red, green, and blue light. When all three are equally stimulated, we perceive white light.

On the other hand, the opponent-process theory suggests that we perceive colors in contrasting pairs - black-white, red-green, and yellow-blue. This theory explains the phenomenon of afterimages and color constancy, where the eye and brain compensate for changes in lighting conditions to maintain a stable color perception.

Seemingly contradictory, these theories are, however, quite complementary. Trichromatic theory describes color perception at the level of the photoreceptors in the eye, while the opponent-process theory explains how signals from these receptors are processed in the brain.

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Which of the following best describes an interaction between Earth and solar energy that functions to warm up the planet?

Answers

Global Warming I hope this is right

What is the taxonomy of two organisms from largest grouping to smallest grouping? For example: Bess Beetle; Eukarya, Animalia, Arthropoda, Insecta, Coleoptera, Passalidae, (Odontotaenius disjunctus)

Answers

The order that taxonomy is written is : Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. A good mnemonic (without domain) is King Phillip Came Over For Good Spaghetti. Tiger: Eukarya, Animalia, Chordata, Mammalia, Carnivora, Felidae, Panthera (Panthera tigris) Freshwater Angelfish: Eukarya, Animalia, Chordata, Actinoptergii, Perciformes, Cichlidae, Pterophyllum (Pterophyllum scalare)

Answer:

The order that taxonomy is written is : Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. A good mnemonic (without domain) is King Phillip Came Over For Good Spaghetti. Tiger: Eukarya, Animalia, Chordata, Mammalia, Carnivora, Felidae, Panthera (Panthera tigris) Freshwater Angelfish: Eukarya, Animalia, Chordata, Actinopterygii, Perciformes, Cichlidae, Pterophyllum (Pterophyllum scalare)

literally the same thing word after word

hope this helps:)

Explanation:

Which foods, mentioned in the text, help digestion?

Answers

Final answer:

Although no specific foods are mentioned, the text implies that foods rich in proteins, carbohydrates, and lipids are essential for digestion, beginning in the mouth and finishing in the small intestines.

Explanation:

The question doesn't directly specify any foods from the provided text that aid in digestion. However, the student can infer from the text on digestion that foods rich in proteins, carbohydrates, and lipids are essential as they begin chemical digestion starting in the mouth that is then completed in the small intestines. For instance, the process of lipid digestion begins in the intestine, facilitated by bile and the enzyme pancreatic lipase. Proteins and carbohydrates, on the other hand, start their initial digestion process in the stomach and are subsequently broken down in the small intestine with the aid of intestinal and pancreatic juices.

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Which populations would benefit the most from the presence of decomposers?

Answers

I'm guessing there was answer choices to this problem? regardless I think I know the answer to it. Plant populations would benefit the most of the presence of decomposers due to the fact that decomposers release nutrients into the soil when they break down things.

Answer:

Producers (plants) would benefit most from the presence of decomposers.

Explanation:

The act of recycling practiced by decomposing beings plays an important role in the ecological balance of the planet, because in addition to putting an end to the organic remains of dead beings, they produce nutrients. These nutrients are essential for the continuity of life within ecosystems. Plants, for example, are extremely dependent on this process as they need to absorb nutrients in the soil to grow. As the plants represent the producer population, it can be said that the producers will benefit most from the presence of decomposers.

Photochemical smog:
a. is sometimes called london-type smog.
b. was more prevalent in the 1800s than the 1900s.
c. is caused primarily by industrial emissions.
d. is formed from chemical reactions involving sunlight, nitrogen oxides and hydrocarbons.
e. is generally worse during the winter months.

Answers

Photochemical smog, created by the chemical reaction between sunlight, nitrogen oxides and volatile organic compounds is (e) generally worse during the winter months in part because of the increase in energy used to heat homes and other buildings.

When a portion of the sample does not respond to the survey?

Answers

the controlled of guessed 

Part a - identifying the processes of replication, gene expression, and recombination this activity requires that you correctly identify the processes of dna replication, gene expression, and recombination by matching images to brief descriptions of each process. drag each of the items into the appropriate bin.

Answers

I found the exercise on the internet with the images and brief descriptions. Attached is an image of it.

To the DNA replication bin:
-Image of one cell dividing into two cells, and the mother cell has its DNA being unfolded and replicated.
-"DNA -> 2DNA (copying one DNA molecule to make two identical DNA molecules)"

To the gene expression bin:
-Image of only one cell with some arrows within it indicating the gene expression flow: DNA -> mRNA -> protein
-"DNA->mRNA->protein"
-"transcription"
-"translation"

To the recombination bin:
-Image with two cells being one the donor and the other one the recipient. The recipient has DNA with different colours pretending to represent that its DNA has different origins.
-"transformation"
-"conjugation"
-"transduction"

Mr. jones is admitted to the nurse's unit from the emergency department with a diagnosis of hypocalcemia. his laboratory results show a serum calcium level of 8.2 mg/dl (2.05 mmol/l). for what assessment findings will the nurse be looking

Answers

The treatment of hypocalcemia depends on the cause ,the severity and the presence of symptoms.Hypocalcemia generally results from another disease process. Most hypocalcemic emergencies are mild and require only supportive treatment and other laboratory evaluation. In this case the nurse will be looking for severe hypocalcemic symptoms like seizures,tetany,refractory hypotensionn and arrythmias.And other laboratory evaluation tests to find whether hypocalcemia is due to some other systemic problem.

Which type of muscle has muscle cells that connect to one another at junctions called intercalated disks?

Answers

Answer:

Cardiac muscles have intercalated disc that connects one cardiac muscle fibre to other.

Explanation:

Intercalated discs are a characteristic feature of cardiac muscles. These structures connect one cardiac fiber to others. Intercalated discs have desmosomes and gap junctions.

The function of desmosomes of the intercalated disc is to hold the cardiac muscle fibers together while gap junctions serve to facilitate the rapid conduction of electrical signals.

Atoms of the same element can have different properties.

True False

Answers

Atoms of the same element have the same chemical properties. The only differences between atoms of the same element are the number of neutrons in the nucleus and the atomic weight of each isotope. false

Atoms of the same element can have different properties due to the existence of isotopes, which have different numbers of neutrons while having the same number of protons. This affects their physical properties like mass and stability. Therefore, the statement is true.

This is due to the existence of isotopes, which are atoms of the same element that have different numbers of neutrons. For example, carbon-12 and carbon-14 are both isotopes of carbon, but they have different masses and properties due to the difference in neutrons.While isotopes have the same number of protons and generally the same chemical properties (because they have the same number of electrons), their physical properties, such as mass and stability, can differ significantly. This variance in properties among isotopes of the same element illustrates why the given statement is accurate.

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In comparing a desert to a marsh, which statement is not true?


The temperature and moisture of a desert vary more from one place to another.


Physical conditions in a marsh vary less from place to place.


Many organisms in deserts and marshes exhibit convergent evolution.


A desert has more biodiversity than a marsh.

Answers

Many organisms in deserts and marshes exhibit convergent evolution this is NOT true

Answer:

Answer:  1. A desert has more biodiversity than a marsh.

Explanation:

A desert is an area exhibiting hot and dry climatic conditions. A desert is a biome which exhibit low precipitation rate as a result of this it possess low diversity of life forms. Marsh is a wetland that is situated near the edges of lakes and streams. Marshes form a transition regions between aquatic and terrestrial regions. The availability of water in the marshes supports the life of many life forms.

Hence, on comparing a desert to a marsh, a desert has more biodiversity than a marsh.

Why does a neural network store more information than a molecule like dna, even if the dna had the same number of base-pairs as neurons or synapses in the network?

Answers

Answer: Imagine a very simple neural network, with four neurons. Each neuron is connected to three other neurons in this example. Therefore, the total number of neuron connections is going to be 12 in this example. We're comparing this to a DNA molecule that is 12 bp long. Effectively, we can say that the DNA molecule is able to store 12 bits of information. The information the neural network can store however is basically a function of how many different firing patterns there can be. It's easy to see how that's a lot bigger than 12.

Is glucose stored as starch in the potato? does this explain your results in table 3.6?

Answers

yes glucose is stored as starch in a potato

A healthy ______ helps us have healthy relationships

Answers

A healthy SENSE OF SELF ESTEEM helps us have healthy relationships

Answer:

A healthy SENSE OF SELF ESTEEM helps us have healthy relationships

Explanation:

True or False: Most familiar life forms live in regions of biomes that humans inhabit.

Answers

TRUE hope that helps!

in the rock cycle, how does rock become sediment?

Answers

Igneous rock could erode and become sediment and deposited and slowly change into a sedimentary rock.
tocks erode an then the small particles are forced to travel so they are then deposited in  layers on top of each other until they harden and become sediment.

Explain why scientists rejected Lamarck’s ideas about evolution. What is an example that they might have used in their argument against his ideas? Enter your answer in the space provided.

Answers

Information is not passed on through DNA but through molecules having an influence on the DNA of the new generation.
This is one argument against Lamarck's ideas.

He thought they changed from simple organisms to more complex organisms because they had an innate drive to become more complex and "perfect."  Lamarck thought that when organisms changed their behaviors in response to a changing environment, their bodies changed. When they used a part of their bodies more, it changed accordingly. When they used a part of their bodies less, it shrank.


young tadpoles breath like fish. what structure enables them to breathe underwater
A. tracheae
B. skin
C. alveoli
D. gills

Answers

Gills would be the most common sense answer. I took the test and it was correct.

What hormone is responsible for stimulating the breakdown of liver glycogen and its release as glucose?

Answers

The hormones that stimulate the breakdown of liver glycogen are epinephrine and glucagon. Epinephrine is the one that triggers the glycogen breakdown inside the muscle and also inside the liver. However, the liver is the one that is more active or responsive to the hormone called glucagon than the muscles. A glucagon is a hormone which is a polypeptide hidden by the cells of our pancreas called α cells whenever our blood-sugar is low. This hormone indicates the state of starving. 

Question 8 of 25the portion of the pituitary that secretes oxytocin is the _____ pituitary

Answers

The posterior pituitary

If your job was to inform the smiths of their test results,What would you say?

Answers

well just tell them what they got and it depends on what grade they got

If your job was to inform the smiths of their test results it shows that Smith with not be liable.

What will be the role of Smith?

In order for Smith to be liable, there has to be formal proof that Smith received the registered letter in due time, i.e. before the redecoration work was completed. In such a case Smith would have to stop things from happening in case he did not agree to the changes, or agree to the changes formally to be hold responsible for them.

Laissez-faire is an economic system in which the market is free for state controls, regulations, tariffs and basically is a system in which the private parties are free of doing whatever they want in the market.

Adam Smith criticized this economic system, saying that the results of a Laissez-faire economic system could lead to inepticism and indolence, as people in time might be unable to look at their own economic interest.

Therefore, If your job was to inform the smiths of their test results it shows that Smith with not be liable.

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Other Questions
A molecule whose ends have opposite electric charges is called a _____ molecule.magneticdiatomicneutralpolar Please help me with #1 a. True b. False in passive transport, molecules can only move with the net movement of molecules down their concentration gradient a meander that has been cut off from the river becomes a solve the inequality 6n-3 > -18a. n > -2.5b. n > -3.5c. n < -2.5 d. n > 2 G a a t t c given the dna sequence shown here, what would be the sequence of the complementary mrna strand determine whether each equation is a linear equation. write yes or no. if yes, write the equation in standard form. if the answer is no, circle the part that makes it no1. y = 4 - 2x Sam gets $1000 dollars per month. She has to spend $20 a day on transportation, she also needs to buy groceries each week and have $30 extra spending money per week. How much money should be spent on food per day? Why did stalin want the us and britain to open a second front in europe? A person uses a spoon to eat a certain food. each spoonful tastes slightly different from the one before it. the food is most likely _____. a compound a heterogeneous mixture an element a homogeneous mixture What is the product of 412 and 212 ? Enter your answer as a mixed number, in simplified form, in the box. Eleven! Then he was late for that lecture too. What day of the week was it? He stopped at a newsagent's to read the headline of a placard. Thursday. Ten to eleven, English; eleven to twelve, French; twelve to one, physics. What kind of style is suggested by the incomplete sentences? ac and bd are perpendicular bisectors of each other. find the perimeter of ADE Margarine and butter are examples of _____. F(x) = |x 1| find the derivative from the left at x = 1. if it does not exist, enter none. Which of the following points is a solution of the inequality y < -|x|? a. (1,-2)b. (1,-1)c. (1,0) Which of the following is an example of a proper fraction? A. 76 B. 43 C. 34 D. 44 The probability that an event will occur is 100%. Which of these best describes the likelihood of the event occurring? Likely Certain Unlikely Impossible What factors affect water quality?In a typical drinking-water treatment process, ____________________ is when air is forced through the water to reduce unpleasant odors and taste. What would happen if members of parliament were paid to serve the government?