Help! this is due today!! 1) Why do muscle cells have so many mitochondria?

A: The mitochondria in muscle cells are smaller so more are needed.
B: Muscle cells are bigger than every other cell and can fit more mitochondria.
C: There are more mitochondria only because there are more nuclei.
D: Muscle cells need to quickly respond to energy needs.

2) What is the effect when a muscle contracts? *

A: The muscle pushes on another muscle.

B: The muscle pushes on a bone.

C: The muscle lengthens.

D: The muscle shortens.

4) Which of the following is stored in the skeletal system?

A: potassium

B: calcium

C: sodium

D: water

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How are people today protected from poop 50 points

Poliovirus is an rna virus of the picornavirus group, which uses its rna as mrna. at its 5' end, the rna genome has a viral protein (vpg) instead of a cap. this is followed by anontranslated leader sequence, and then a single long protein-coding region (~7000 nucleotides), followed by a poly-a tail. observations were made that used radioactive amino acid analogues. short period use of the radioactive amino acids result in labeling of only very long proteins, while longer periods of labeling result in several different short polypeptides. what conclusion is most consistent with the results of the radioactive labeling experiment? a) host cell ribosomes only translate the viral code into short polypeptides.b) the rna is only translated into a single long polypeptide, which is then cleaved into shorter ones.c) the rna is translated into short polypeptides, which are subsequently assembled into large ones.d) the large radioactive polypeptides are coded by the host, whereas the short ones are coded for by the virus.