hich of the following is necessary for replication of a prion? group of answer choices
A dna
B. dna polymerase
C. lysozyme D. prpsc E. rna

Answers

Answer 1

PrPSc is necessary for replication of a prion. The correct answer is D.

Prions are infectious proteins that can cause neurological diseases in animals and humans. They are composed solely of abnormally folded, misshapen prion proteins (PrPSc). These abnormally folded proteins aggregate together and form plaques in the brain, which damage and kill nerve cells.

Prions are able to replicate themselves by converting normal prion proteins (PrPC) into the abnormal PrPSc form. This process is thought to occur when PrPSc binds to PrPC and induces it to change its shape. The newly formed PrPSc proteins can then go on to convert more PrPC proteins, and so on.

The replication of prions is a slow process, and it can take years or even decades for symptoms of a prion disease to appear. However, once symptoms do appear, they are usually progressive and fatal.

There is no cure for prion diseases, and treatment is aimed at relieving symptoms and slowing the progression of the disease.

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Related Questions

How are all animal cells alike?

Answers

Answer:

Animal cells have centrosomes and lysosomes

What are created during the process of translation?

Answers

Answer:

a gene expression

Explanation:

and

__H2SO4+__NaNO2= __HNO2+___Na2SO4

(fill in the blanks, and balance the equation)

Answers

1 H2SO4 + 2 NaNO2 ---> 2 HNO2 + 1 Na2SO4

Which component of the endomembrane system is responsible for packaging and preparing exist proteins in vesticles?

Answers

Answer: Golgi apparatus

Explanation: The Golgi is responsible for packaging sorting tagging and distribution.

Hope this is helpful :)

Would the answer to this be C or would it be A?

Answers

Answer:

I'm thinking maybe A

Explanation:

The total variety of all living things on Earth is described as
А an ecosystem
B biodiversity
с a population
D competition

Answers

Answer:

biodiversity

Explanation:

An ecosystem is all the things in an biome but not all Earth

biodiversity is the variety of all living things

a population is the number of a species in an area

competition is when animals compete for resources

P.S. Please mark Brainliest if correct?

A. Describe the role of the promoter in eukaryotic gene expression. Explain how a negative regulatory molecule could inhibit transcription at the promoter.

B. Identify TWO events that occur during RNA processing. Explain how RNA splicing increases the variation of mRNA molecules.

C. Describe the role of miRNA in gene expression.

Answers

Answer:

Explanation:

A. The role of promoter in eukariotic gene expression is It is to bind transcription factors that regulate transcription initiation. This molecule is so important because control the binding of RNA polymerase to DNA. The promoter region may be short or very long; the longer the promoter is, the more protein binding space is available. A negative regulatory molecule has the possibilty to inhibit transcription at the promoter because these molecule block the binding of RNA polymerase to the promoter region, thus not allowing the initiation of transcription, in some particular cases the negative regulator binds to the lac repressor and will bind to the promoter in the same site where RNA polymerase would bind to.

B. Two process that occurs during RNA processing are RNA splicing and 5′ capping, 3′. RNA splicing is a process known for removing the introns from the pre-RNA and stuck back together the restant parts, exons. This process has as a goal form a mature mRNA that does not contain the intron sequences. RNA splicing has an effect on the variation of mRNA molecules because through a process called alternative splicing more than one mRNA can be made from the same gene. 

C. Even though they are not quite the same thing miRNA and negative regulatory molecules have the same role, which inhibits the translation and silence genes. They regulate gene expression by binding to the 3'-UTR of their target mRNAs and destabilizing the mRNA and translational silencing, repressing protein production. Even so, under specific circumstances, miRNA can activate translation or regulate transcription.

PLEASE HELP !!!!! ILL GIVE THE BRAINIEST!!!

Answers

Answer:

hello i am not sure but i think the answer is D

Each species has a special scientific name that is selected by the person or group that discovers it. The name typically conveys information about the species. Thus, option D is correct.

What are the main characteristic for changing an organism?

The kingdom is a smaller taxon than the recently added domain, which is a more expansive taxon. Similarities in outward physical characteristics serve as the foundation for the Linnaeus system.

Gene variants, sometimes known as mutations, can cause genetic differences, or a normal process in which genetic information is rearranged as a cell prepares to divide can also cause genetic variations (known as genetic recombination).

Therefore, Different phenotypes can be introduced into an organism by genetic changes that change gene activity or protein function.

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True or False
An increase in cell size results in an increase in surface area to volume ratio.

Answers

Answer:

true I think

Explanation:

I think so I hope so

The map shows the locations of major earthquakes in the Northern Hemisphere.
North
America
Pacific
Ocean
Atlantic
Ocean
Which sentence describes the pattern of earthquakes that the map shows?

Answers

Answer:

earthquakes around the North American continent

If sperm and egg cells have half of the number of chromosomes found in other body cells, how do gametes form?

Answers

cuz they combine during fertilization and since 2 halves = 1 whole, u get gametes w a full number of chromosomes

4. What is an example of positive feedback?
a. Regulating blood glucose levels

b. Maintaining internal body temperature

c. Producing milk in nursing mothers

Answers

Answer:

C

Explanation:

It is known as lactation. The suckling action of an infant produces prolactin, which leads to milk production; more suckling leads to more prolactin, which in turn leads to more lactation. This is a positive feedback system as the product (milk) produces more suckling and more hormone. When the child is no longer breast feeding, the prolactin drops off and milk production goes down.

Question 1
Which of the following can convert nitrogen in the air into a form plants can use?
A
bacteria
B
fungi
C
animals
D
protists

Answers

bacteria can convert nitrogen in the air into a form plants can use

Bacteria can convert nitrogen in the air into a form plants can use.

The earth atmosphere contain a huge amount of oxygen which is needed by plants. These Nitrogen can be converted into a form in which can be used by plants through a process known as nitrogen fixation.

Fixation is a process that converts nitrogen in the atmosphere into forms in which plants can use. Nitrogen can be fixed using fertilizer.

Also, bacteria can fix nitrogen into the soil naturally.

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What determines the code, or information, of a DNA molecule?

A - the structure of nitrogen bases

B- the color of nitrogen bases

C- The sequence (order) of nitrogen bases

D- the frequency of nitrogen bases

Answers

Answer:

C- The sequence (order) of nitrogen bases

Explanation:

What is the mRNA made from the following DNA.
CGATCG?
(please help!)
A. CGTUCG
B. CGATCG
C. GCTAGC
D. GCUAGC

Answers

Answer:

GCUAGC (D)

Explanation:

DNA always consists of A/T and C/G

RNA (mRNA/tRNA always consists of A/U and C/G but never T!

If you have a T in your DNA, your mRNA will have an A.If you have an A in your DNA, your mRNA will have a U.

DNA never has a U, but RNA never has a T.

Hope this makes sense!


Which of the following is the
amount of time between the
fertilization process and the birth of an organism?
A. 9 months
B. 1 year
C. up to 2 years
D. it depends on the species

Answers

Answer:

D. it depends on the species

Explanation:

Everything is different

Which option states an advantage of sexual reproduction?

Answers

Answer:

The advantages of sexual reproduction: produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.

I hope it's helpful!

One definite advantage of sexual reproduction is that it impedes the accumulation of genetic mutations. Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction.

How do adult drones differ from adult worker ants?
a. Drones have wings; workers don't
b. Drones have eight legs; workers have six
c. Drones lack exoskeletons; workers have them
d. Drones have simple eyes; workers have compound
eyes

Answers

Answer:

a. Drones have wings; workers don't

Explanation:

"Flying ants may be male (the drone) or female (the queen)."

Please help me answer this bro lol

Answers

Answer:

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Explanation:

using the count data and observational data you acquired calculate the number of cfus in the original sample

Answers

Answer:

cuales son los datos ?

Explanation:

cuales son los datos

Do spring tides have the lowest tides

Answers

Answer:

No

Explanation:

King tides are the highest tides. ... In the lunar month, the highest tides occur roughly every 14 days, at the new and full moons, when the gravitational pull of the Moon and the Sun are in alignment. These highest tides in the lunar cycle are called spring tides.

Choose which statement best describes an element.

A. Anything that takes up space

B. A pure substance that cannot be broken down into other substances by chemical means.

C. Water

D. Atom has a nucleus with neutrons and protons in it.​

Answers

Answer:

B

Explanation:

Elements are pure substances that cannot be broken down into other substances by chemical means .

If a strand of DNA has the nitrogen base sequence, GCTAGATGCG, what will be
the sequence of the complementary strand?

Answers

Answer:

CGATCTACGC

Explanation:

The complementary strand of DNA to GCTAGATGCG is CGATCTAGCT.

The nitrogen bases in DNA are complementary to each other. This means that adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).

The strand of DNA GCTAGATGCG has the following sequence of nitrogen bases:

G - guanineC - cytosineT - thymineA - adenineG - guanineA - adenineC - cytosineG - guanine

The complementary strand of DNA will have the following sequence of nitrogen bases:

C - cytosineG - guanineA - adenineT - thymineC - cytosineT - thymineG - guanineC - cytosine

The complementary strand is created by pairing the nitrogen bases in the original strand with their complementary bases. So, the guanine in the original strand pairs with the cytosine in the complementary strand, the cytosine in the original strand pairs with the guanine in the complementary strand, and so on.

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What describes the conversion of ADP to ATP?

Answers

Answer:

ATP stands for adenosine triphosphate, where three phosphoric acids attach themselves to provide high energy phosphate groups to it. This process of conversion of ADP to ATP is called as phosphorylation.

Explanation:

Scientists compare the structures of a chicken embryo and a human embryo at the same stage of development. They find that both vertebrates have
similar shapes and structures, including the presence of gill slits and tails. How is this comparison of the embryos used as supporting evidence of
evolution?
The similarities suggest that chickens and humans are the direct descendants of modern-day fish with tails and gill slits.
The similarities suggest that vertebrates pass through each of the adult stages of their evolutionary history as they develop.
o
The similarities suggest that vertebrates can undergo genetic changes during development that lead to the evolution of new species.

Answers

Answer:ABCD

Explanation:

Answer:

is C correct?

Explanation:

A polygenic trait is controlled by
A. two or more genes.
B. one gene that has only two alleles.
C. one gene with only one allele.
D. two alleles on two genes​

Answers

Answer:

A. two or more genes because most genetic characteristics or traits are controlled by many genes.

Answer:

A. two or more genes

Explanation:

A student prepares for a five-mile run so she eats a nutritious meal three hours before the run. Which correctly illustrates the transformation of energy from eating the meal to the five-mile run?

Answers

Answer: The transformation of energy from eating the meal to the five mile run is from

Chemical energy --> kinetic energy--> thermal energy.

Explanation:

In nature, energy exists in various forms. These forms are inter- convertible, that is, one form of energy can be transformed into another form. Such energy transformations are governed by the laws of thermodynamics.

The first law of thermodynamics states that energy cannot be created or destroyed but may be transformed from one form into another.

Living organisms which comprises the biotic components of an ecosystem are energy converters. For example:

--> plants convert solar energy into chemical energy during photosynthesis

--> animals convert chemical energy into kinetic energy when they move about. This in turn is lost as heat energy when highly complex organised food molecules are broken down.

From the question, the student ate a nutritious meal ( CHEMICAL energy) which is converted to KINETIC energy as she took a five miles run ( as she worked). 'Work' here refers not only to physical activities but also to the various metabolic processes necessary to maintain life. And each time work is done, kinetic energy is converted to heat( thermal energy)

Which describes a single enzyme? A. Exists in many different shapes and sizes. B. Takes part in only one type of chemical reaction. C. Slows down the process of chemical digestion. D. Is involved in many types of chemical reactions.

Answers

Answer: B takes part in only one type of chemical

Are any change in the sequence of bases in DNA or RNA that can cause by mutagen or can happen spontaneously in the cell

Answers

Answer:

MUTATION

Explanation:

Mutation is a change or alteration in the genetic sequence of a DNA or RNA (nucleic acid) that are induced by a chemical substance called MUTAGEN or by a spontaneous occurrence. Mutation are of different types depending on how it occurs in the cell. A mutation can be deletion (removal), substitution (replacement), insertion (addition) etc.

Based on this question that states that "any change in the sequence of bases in DNA or RNA that can be caused by mutagen or can happen spontaneously in the cell", the process of MUTATION is being described.

Please help me, really need it

Answers

Answer:

they r more sever for them because they r a mixed blood type

sumtimes it is very rare for anyone of a mixed blood type to be more vunarable to a diesise rather than a full a or b

Explanation:

Answer:

I believe it is because having two x chromosomes gives the genome a fail safe as it can use the other x chromosomes' non-mutated sequences

Explanation:

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