Question 1

All enzymes are proteins.

Accepted Answer

A) True 
 B)False

Question 2

A single gene always encodes for an enzyme.

Accepted Answer

A) True 
 B)False

Question 3

Because of the abundance of ribosomes,translation is NOT an energy costly process for the cell.

Accepted Answer

A) True 
 B)False

Question 4

Which statement about RNA polymerase in bacteria is INCORRECT?

Accepted Answer

A)  It binds the promoter region of a gene.
B)  It is bound to a sigma factor during initiation of transcription.
C)  It synthesizes RNA.
D)  It catalyzes the addition of nucleotides to the 5'end of a growing RNA stranD.
E)  It dissociates from the DNA at the terminator.F) A) and B)
G) C) and E)

Question 5

A defective ribosome would have the MOST detrimental effect on what processes?

Accepted Answer

A)  translation
B)  replication
C)  transcription
D)  replication and transcription
E)  replication and translationF) B) and E)
G) B) and C)

Question 6

Which statement about the mRNA start codon is INCORRECT?

Accepted Answer

A)  The start codon is only a few nucleotides from the ribosomal binding site.
B)  The start codon is usually GGA.
C)  The start codon is usually AUG.
D)  The start codon specifies the amino acid,methionine.
E)  The start codon defines the reading framE.F) B) and E)
G) All of the above

Question 7

Intervening sequences that are transcribed,but not translated into protein are called

Accepted Answer

A)  exons.
B)  introns.
C)  spliceosomes.
D)  transposons.
E)  transcription factors.F) B) and C)
G) None of the above

Question 8

The process that produces mRNA from DNA is called

Accepted Answer

A)  transcription.
B)  translation.
C)  replication.
D)  processing.
E)  post-translational modification.F) B) and D)
G) A) and C)

Question 9

What basic features of transcription is NOT shared by both prokaryotes and eukaryotes?

Accepted Answer

A)  Both prokaryotic and eukaryotic genes have a promoter site.
B)  RNA polymerase transcribes genes in both prokaryotes and eukaryotes.
C)  Gene transcription involves initiation,elongation,and termination in both prokaryotes and eukaryotes.
D)  The complexity of protein components involved in transcription is similar for both prokaryotes and eukaryotes.
E)  The initiation of transcription in both prokaryotes and eukaryotes involves the interactions of more than one protein.F) B) and D)
G) A) and B)

Question 10

The processes of transcription and translation are collectively known as

Accepted Answer

A)  RNA processing.
B)  gene duplication.
C)  protein synthesis.
D)  DNA synthesis.
E)  gene expression.F) C) and D)
G) D) and E)

Question 11

The termination of translation occurs when a release factor recognizes the stop codon.

Accepted Answer

A) True 
 B)False

Question 12

How many distinct aminoacyl-tRNA synthetases does each cell make?

Accepted Answer

A)  ~1
B)  ~20
C)  ~60
D)  ~120
E)  ~180F) B) and C)
G) A) and B)

Question 13

In eukaryotes,40S and 60S combine to form a 100S ribosome.

Accepted Answer

A) True 
 B)False

Question 14

RNA polymerase II of eukaryotes always requires more than one general transcription factor to initiate transcription.

Accepted Answer

A) True 
 B)False

Question 15

tRNA contains the genetic code for producing a polypeptide.

Accepted Answer

A) True 
 B)False

Question 16

Identify the anticodon sequence for an mRNA sequence that is 5'AUG-GGC-ACU-CAU3'.

Accepted Answer

A)  3'AUG-GGC-ACU-CAU5'
B)  3'UAC-CCG-UGA-GUA5'
C)  5'AUG-GGC-ACU-CAU3'
D)  5'UAC-CCG-UGA-GUA3'
E)  3'TAC-CCG-TGA-GTA3'F) None of the above
G) B) and C)

Question 17

What protein is involved in synthesizing messenger RNA in eukaryotes?

Accepted Answer

A)  RNA polymerase I
B)  RNA polymerase II
C)  RNA polymerase III
D)  sigma factor
E)  both RNA polymerase I and IIIF) None of the above
G) A) and D)

Question 18

An organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA,and ultimately results in the formation of a functional product,is called a

Accepted Answer

A)  chromosome.
B)  trait.
C)  allele.
D)  gene.
E)  expression.F) A) and E)
G) A) and D)

Question 19

What protein influences the ability of RNA polymerase to transcribe genes?

Accepted Answer

A)  DNA polymerases
B)  DNA helicases
C)  transcription factors
D)  snRNPs
E)  tRNAF) D) and E)
G) B) and C)

Question 20

Which statement about tRNA is FALSE?

Accepted Answer

A)  tRNAs of both eukaryotes and prokaryotes share common features
B)  the two-dimensional structure of tRNAs exhibits a cloverleaf pattern
C)  tRNAs are produced in the nucleus
D)  functional tRNAs have been spliced by splicesomes
E)  tRNAs possess an anticodon complementary to the codonF) A) and D)
G) None of the above

Exam 10: Gene Expression at the Molecular Level

Because of the abundance of ribosomes,translation is NOT an energy costly process for the cell.

Correct AnswerverifiedShow Answer

tRNA contains the genetic code for producing a polypeptide.

Correct AnswerverifiedShow Answer

Identify the anticodon sequence for an mRNA sequence that is 5'AUG-GGC-ACU-CAU3'.

Correct AnswerverifiedShow Answer

A defective ribosome would have the MOST detrimental effect on what processes?

Correct AnswerverifiedShow Answer

A single gene always encodes for an enzyme.

Correct AnswerverifiedShow Answer

What basic features of transcription is NOT shared by both prokaryotes and eukaryotes?

Correct AnswerverifiedShow Answer

The processes of transcription and translation are collectively known as

Correct AnswerverifiedShow Answer

What protein influences the ability of RNA polymerase to transcribe genes?

Correct AnswerverifiedShow Answer

How many distinct aminoacyl-tRNA synthetases does each cell make?

Correct AnswerverifiedShow Answer

Which statement about tRNA is FALSE?

Correct AnswerverifiedShow Answer

Intervening sequences that are transcribed,but not translated into protein are called

Correct AnswerverifiedShow Answer

RNA polymerase II of eukaryotes always requires more than one general transcription factor to initiate transcription.

Correct AnswerverifiedShow Answer

What protein is involved in synthesizing messenger RNA in eukaryotes?

Correct AnswerverifiedShow Answer

The process that produces mRNA from DNA is called

Correct AnswerverifiedShow Answer

In eukaryotes,40S and 60S combine to form a 100S ribosome.

Correct AnswerverifiedShow Answer

An organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA,and ultimately results in the formation of a functional product,is called a

Correct AnswerverifiedShow Answer

The termination of translation occurs when a release factor recognizes the stop codon.

Correct AnswerverifiedShow Answer

All enzymes are proteins.

Correct AnswerverifiedShow Answer

Which statement about RNA polymerase in bacteria is INCORRECT?

Correct AnswerverifiedShow Answer

Which statement about the mRNA start codon is INCORRECT?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified