Exercise: Protein Synthesis

Questions for: Protein Synthesis

Proteins contain __________ different amino acids, whereas DNA and RNA are composed of __________ different nucleotides
A:
20,64
B:
3,20
C:
4,20
D:
20,4
Answer: D
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The lac operon contains the z, y and a structural genes
A:
encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
B:
encoding p-galactosidase and galactose permeases
C:
encoding P-galactosidase only
D:
None of the above
Answer: A
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The structure in a bacterium that indicates an active site for protein synthesis is
A:
a chromosome.
B:
a cell membrane,
C:
a flagellum.
D:
a polysome.
Answer: D
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The site of protein synthesis is
A:
Ribosome
B:
Nucleus
C:
Endoplasmic reticulum
D:
Chromosome
Answer: A
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Protein synthesis rates in prokaryotes are limited by the rate of mRNA synthesis. If RNA synthesis occurs at the rate of 50 nucleotides/sec, then rate of protein synthesis occurs at
A:
10 amino acids/sec
B:
17 amino acids/sec
C:
25 amino acids/sec
D:
50 amino acids/sec
Answer: B
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