Suppose that the genes required for Isoleucine (an amino acid) biosynthesis are contained within an operon. If the cell is grown in the presence of high amounts of isoleucine you would expect to find:
The repressor protein to bind to the operator, allowing transcription.
The repressor protein to bind to the operator, preventing transcription.
The repressor protein released from the operator, preventing transcription.
The repressor protein released from the operator, allowing transcription.
Question 2

The tRNA with UAU as the anticodon would be attached to which amino acid?
isoleucine
serine
leucine
tryrosine
Question 3 

In an expression plasmid, the origin of replication: _________________
Is the position where the base number begins at 1.
allows for growth of plasmid containing bacteria in the presence of antibiotics.
is responsible for the replication of mRNA.
allows the bacteria to duplicate the plasmid.
Question 4

The difference between the genome of an organism and the epigenome is: _____________________
The accumulation of mutations in the DNA sequence.
The epigenome refers to changes in DNA expression due to changes in DNA packaging.
nothing, both terms refer to the genetic content of an organism
Question 5 

Which of these is not used in DNA replication?
Helicase
DNA polymerase
Primer
RNA polymerase
Question 6

During cell division, the chromosomal DNA becomes
more condensed
less condensed
there is no change in the condensation level.
Question 7

The correct order of DNA segments in an operon is:
Promoter, structural genes, operator.
Promoter, operator, structural genes.
Operator, structural genes, promoter.
Operator, promoter, structural genes.
Question 8

Is the following statement true of prokaryotic cells, eukaryotic cells or both? One gene can encode multiple different proteins (different in amino acid sequence).
Prokaryotic
Eukaryotic
Both prokaryotic and eukaryotic
Question 9 

Which of the following terms refers to a region of a chromosome that has a specifiic function?
DNA
Gene
Allele
Genotype
Question 10 

Which of the following DNA sequences is a recognition site for restriction endonucleases:
TTTT
AATT
TAAT
ATTA
AAAA
Question 11 

Separation of the original DNA strands is due to the action of:
polymerase
helicase
RNA primers
single stranded binding protein
Question 12

The following mRNA: ATG CAT CAT, codes for which of the following amino acids:
Tyr Tyr Val
Val Tyr Tyr
Met His His
Question 13 

A gene codes for a protein that is 500 amino acids long. Which of the following mutations is likely to be the most deleterious?
a nonsense mutation at the 490th codon
a missense mutation at the 490th codon
a nonsense mutation at the fifth codon
a missense mutation at the fifth codon
Question 14  

Which of these is not used in DNA replication?
RNA polymerase
Primer
Helicase
DNA polymerase
Question 15 

 
Is the following statement true of prokaryotic cells, eukaryotic cells or both? Multiple genes can be transcribed together into a single mRNA.
Prokaryotic
Eukaryotic
Both prokaryotic and eukaryotic