A cell that cannot make tRNA?

Question

A.
Can make proteins if amino acids are provided in the growth medium.
B.
Can make proteins if mRNA is provided in the growth medium.
C.
Can't make proteins unless aminoacyl synthetase is provided in the growth medium.
D.
Can't make proteins.
E.
None of the above.

Answer 1

I'm not sure of the question. If the cell plain cannot make the RNA itself, like the actual RNA molecule for tRNA, then the answer is D.

If it can make tRNA RNA molecule, but cannot make the tRNA which is bonded with the amino acid, then the answer is C.

tRNA is used to transfer amino acids to a growing polypeptide chain being synthesized in a ribosome.
tRNA is hooked with it's proper amino acid with teh aminoacyl synthetase enzyme, and this is what makes it a tRNA able to transfer amino acids. If this is provided in the growth medium, then the cell should be perfectly fine.

i think C's the answer they're looking for, what they mean by the cell cannot make tRNA

Edit: emucompboy does have a point that i overlooked. normally a protein would be far to big to diffuse through the cell membrane, but what about endocytosis? idk, i'm not a actual research scientist, so i don't know if this would really happen

and lol tom j has no idea what he's talking about

Answer 2

D.
I like the argument of the guy above for aminoacyl synthetase -- but, that's so big it's unlikely to cross into the cell through the cell membrane in any useful manner.

Answer 3

e because transfer rna just takes the rna out of the cell

Answer 4

Doomed. DOOMED. D*O*O*M*E*D, I tell you.

No proteins, no fun.