Protein Synthesis-BIOL-107
Protein Synthesis
Question 1
The function of a gene is
carries genetic information
dictates the nucleotide sequence and chain length of a protein
dictates the nucleotide sequence and chain length of a protein
dictates the amino acid sequence and chain length of a protein
dictates the primary structure of a protein
Question 2
DNA and RNA are similar because they are both
are involved in protein synthesis
double stranded
double stranded
are located only in the cell’s nucleus
composed of nucleotides
consist of the bases A,T,G.C
Question 3
RNA is different than DNA because it
does not contain phosphate
is usually double stranded
has ribose
contains the nitrogen base uracil
is present in both the nucleus and the cytoplasm
Question 4
0.25 / 0.25 pts
The entire DNA double helix is copied during
translation
DNA replication
DNA replication
transcription
Question 5
A polypeptide is synthesized during
translation
DNA replication
transcription
Question 6
tRNA carries amino acids during
transcription
DNA replication
translation
Question 7
mRNA is synthesized during
transcription
translation
DNA replication
Question 8
What happens to introns?
they are translated
they are clipped out of the mRNA before translation
they are put together to make the mature mRNA
Question 9
Introns are not present in prokaryotic chromosomes.
True
False
Question 10
The sequence of the mRNA transcribed from the DNA sequence
5′ T A C C A A A C G A T G A C T 3′
will be
5′ T A C C A A A C G A T G A C T 3′
will be
3′ A T G G T T T G C T A C T G A5′
none of these
3′ U A C C A A A C G A U G A C U 5′
False3′ T A C C A A A C G A TG A C T 5′
3′ A U G G U U U G C U A C U G A 5′
Question 11
Use the codon dictionary on page 12 of Topic 10 to translate the following mRNA into a polypeptide.
5′ A C A U G A U C U C C A C G 3′
The amino acid sequence of this polypeptide is:
The amino acid sequence of this polypeptide is:
methionine, isoleucine, serine, threonine
methionine, leucine, valine, glycine
lysine, threonine, serine, leucine
methionine, arginine, tyrosine, hisitidine
Question 12
If the DNA sequence A C G was changed to A C C, what kind of mutation would that be? (Don’t forget to transcribe, then translate)
missense
silent
nonsense
Question 13
If the DNA sequence A C G was changed to A C T, what kind of mutation would that be? (Don’t forget to transcribe, then translate)
nonsense
silent
missense
Question 14
In the Ames test, if the test chemical is mutagenic, either by itself or when activated by rat liver extract, you should expect to see …… on the plate without added histidine
No colonies
Many auxotroph colonies
Many colonies of revertants
Question 15
Thymine dimers
Are cross-linkage between two adjacent thymines
Cause problems during replication and transcription
Cause problems during replication and transcription
Are Caused by UV light
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