Genetics exam 3!
Whereas the nucleotide strand used for
transcription is termed the _____, the template strand; nontemplate strand
nontranscribed strand is called the _____.
Anticodons are found in _____ molecules. tRNA
The human gene encoding calcitonin contains
six exons and five introns and is located on
chromosome 11. The pre-mRNA transcript from
this gene can generate either calcitonin or
calcitonin gene-related peptide (CGRP) in a alternative RNA processing
tissue-specific manner. Which of the following
processes makes production of two functionally
and structurally different proteins from the same
gene possible?
RNA molecules have the same 5′-to-3′
Which of the following statements is NOT true? orientation as the DNA template strands to
which they are complementary.
The spliceosome is a large, ribonucleoprotein
nucleus.
complex located in the:
When codons that code for the same amino acid
differ in their _____, a single tRNA might bind 3′ base
both of them through wobble base pairing.
Which of the following is a sequence of DNA
promoter
where transcription is initiated?
DNA primase requires a _____ template and _____
DNA; RNA
nucleotides to initiate primer synthesis.
During DNA replication, the synthesis of the new
strand requires the addition of a new dNTP to
the 3'-OH group of the growing nucleotide cleavage of two phosphate groups from the
strand by DNA polymerase. Which of the dNTP
following provides the energy needed for this
step?
, Where are promoters usually located? upstream of the start site
The 5' cap in an mRNA plays a role in translation
initiation. Which of the following could be a The 5' cap could recruit proteins that would help
plausible mechanism by which a 5' cap could to assemble the ribosomes.
enhance initiation?
Which of the following enzyme and function DNA helicase; rewinding and reforming the DNA
pairs is INCORRECTLY matched? double helix as the replication terminates
Telomerase activity is MOST likely to be found in
germ line
which cells in humans?
Suppose Meselson and Stahl had obtained the
following results in their experiment. These
semiconservative and dispersive replication
results would be consistent with which model of
replication?
Which of the following statements about RNA RNA polymerase reads a template strand of
polymerase is NOT true? DNA 5' to 3'.
The 5' end of a prokaryotic mRNA can be
Which of the following is observed in
translated while the 3' end is still being
prokaryotes but not in eukaryotes?
transcribed.
About ______ of the human genome directly
1%
encodes proteins.
During the posttranscriptional processing of
pre-mRNA, a 5′ cap is added to an mRNA.
Arrange the following steps of the capping
process in the CORRECT order.
1. Addition of a guanine nucleotide via a 5′–5′
bond
2. Removal of a phosphate from a 2, 1, 4, 3
ribonucleotide triphosphate at the 5′ head of
the pre-mRNA
3. Methylation at the 2′ position of the sugar in
the second and the third nucleotides
4. Methylation at position 7 of the terminal
guanine base
What is the function of peptidyl transferase
It forms peptide bonds.
activity?
Whereas the nucleotide strand used for
transcription is termed the _____, the template strand; nontemplate strand
nontranscribed strand is called the _____.
Anticodons are found in _____ molecules. tRNA
The human gene encoding calcitonin contains
six exons and five introns and is located on
chromosome 11. The pre-mRNA transcript from
this gene can generate either calcitonin or
calcitonin gene-related peptide (CGRP) in a alternative RNA processing
tissue-specific manner. Which of the following
processes makes production of two functionally
and structurally different proteins from the same
gene possible?
RNA molecules have the same 5′-to-3′
Which of the following statements is NOT true? orientation as the DNA template strands to
which they are complementary.
The spliceosome is a large, ribonucleoprotein
nucleus.
complex located in the:
When codons that code for the same amino acid
differ in their _____, a single tRNA might bind 3′ base
both of them through wobble base pairing.
Which of the following is a sequence of DNA
promoter
where transcription is initiated?
DNA primase requires a _____ template and _____
DNA; RNA
nucleotides to initiate primer synthesis.
During DNA replication, the synthesis of the new
strand requires the addition of a new dNTP to
the 3'-OH group of the growing nucleotide cleavage of two phosphate groups from the
strand by DNA polymerase. Which of the dNTP
following provides the energy needed for this
step?
, Where are promoters usually located? upstream of the start site
The 5' cap in an mRNA plays a role in translation
initiation. Which of the following could be a The 5' cap could recruit proteins that would help
plausible mechanism by which a 5' cap could to assemble the ribosomes.
enhance initiation?
Which of the following enzyme and function DNA helicase; rewinding and reforming the DNA
pairs is INCORRECTLY matched? double helix as the replication terminates
Telomerase activity is MOST likely to be found in
germ line
which cells in humans?
Suppose Meselson and Stahl had obtained the
following results in their experiment. These
semiconservative and dispersive replication
results would be consistent with which model of
replication?
Which of the following statements about RNA RNA polymerase reads a template strand of
polymerase is NOT true? DNA 5' to 3'.
The 5' end of a prokaryotic mRNA can be
Which of the following is observed in
translated while the 3' end is still being
prokaryotes but not in eukaryotes?
transcribed.
About ______ of the human genome directly
1%
encodes proteins.
During the posttranscriptional processing of
pre-mRNA, a 5′ cap is added to an mRNA.
Arrange the following steps of the capping
process in the CORRECT order.
1. Addition of a guanine nucleotide via a 5′–5′
bond
2. Removal of a phosphate from a 2, 1, 4, 3
ribonucleotide triphosphate at the 5′ head of
the pre-mRNA
3. Methylation at the 2′ position of the sugar in
the second and the third nucleotides
4. Methylation at position 7 of the terminal
guanine base
What is the function of peptidyl transferase
It forms peptide bonds.
activity?
