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Fudgin [204]
2 years ago
12

why are the polio virus unable to reproduce if their DNA base sequence is different from the normal virus?

Biology
1 answer:
maks197457 [2]2 years ago
5 0

Answer:

When the virus infects a cell, the RNA genome enters the cell and programs it to make new virus particles. These virus particles are released from the cell and go on to infect new cells. In humans, poliovirus is ingested, and replicates in cells of the gastrointestinal tract.Poliovirus, the prototypical picornavirus and causative agent of poliomyelitis, is a nonenveloped virus with a single-stranded RNA genome of positive polarity. The virion consists of an icosahedral protein shell, composed of four capsid proteins (VP1, VP2, VP3, and VP4), which encapsidates the RNA genome (1).RNA viruses generally have very high mutation rates compared to DNA viruses, because viral RNA polymerases lack the proofreading ability of DNA polymerases. The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them.

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A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur
yanalaym [24]

Answer:

A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homzygous black rabbit is crossed with a heteozygous black rabbit, what phentypic ratio will occur in the first generation?

A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homzygous black rabbit is crossed with a heteozygous black rabbit, what phentypic ratio will occur in the first generation?A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homzygous black rabbit is crossed with a heteozygous black rabbit, what phentypic ratio will occur in the first generation?

Explanation:

A certain species of rabbit can have either black or grey fur. The allele for black fur is dominant over the allele for grey fur. If a homzygous black rabbit is crossed with a heteozygous black rabbit, what phentypic ratio will occur in the first generation?

7 0
3 years ago
Identify the functional area of the kidney at letter<br> b.
Tresset [83]
Considering the attached figure; the functional area of the kidney at letter b; is the Renal pyramid. 
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6 0
3 years ago
Living things need to maintain their internal environment . This is known as homeostasis What role does homeostasis play in cont
barxatty [35]

Answer:

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5 0
2 years ago
What kind of fossil would a gastropoda shell must likely be?
DiKsa [7]
You didn't give any answer choices (i'm answering this through research and what i already know)

the first is fossilized dung, and that's not generally gastropod shells. A carbon film would be something thin, seeing as it's a film, and gastropods aren't that. A gastrolith is a stone swallowed by an animal to help with digestion, and that's also not a gastropod. 

<span>Gastropod fossils may be molds, but usually aren't. Still, they can be. It's a better answer than; film or stomach stones.</span>
8 0
3 years ago
An ionic bond occurs when _____.
vfiekz [6]
The answer is B . two atoms exchange electrons and become ions
3 0
3 years ago
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