Biology 101 - General Biology » Spring 2022 » Module 3 Quiz 2
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Question #1
Which statement about DNA is correct?
A.
DNA contains phosphorus.
B.
DNA contains purines, but not pyrimidines.
C.
DNA contains sulfur.
D.
DNA contains the sugar ribose.
Question #2
During DNA replication, what is the function of DNA ligase?
A.
It lengthens chromosome telomeres.
B.
It makes an RNA primer.
C.
It unwinds the double helix.
D.
It joins Okazaki fragments together.
Question #3
Which molecule or structure is NOT needed during DNA replication?
A.
RNA primer
B.
ribosome
C.
DNA template molecule
D.
DNA nucleotide
Question #4
During DNA replication, one strand of new DNA is made in one long piece. The other strand of new DNA is made in many short pieces. The strand that is made in one long piece is called the _____________________________.
A.
leading strand
B.
right-handed strand
C.
3' strand
D.
lagging strand
Question #5
Which of the following statements best describes the eukaryotic chromosome?
A.
The number of genes on each chromosome is different in different cell types of an organism.
B.
It consists of a single linear molecule of double-stranded DNA plus proteins.
C.
It is composed of DNA alone.
D.
The nucleosome is its most basic functional subunit.
Question #6
The DNA sequence AGT is complementary to the mRNA sequence ______________.
A.
ACU
B.
UGA
C.
UCA
D.
TCA
Question #7
In eukaryotes, the RNA made during transcription must go through _________________________ to make the mRNA that is ready for translation.
A.
mutation
B.
transcription elongation
C.
substitution
D.
RNA processing
Question #8
The molecule that carries an amino acid to the ribosome is called a(n) _____________________________.
A.
mRNA
B.
promoter
C.
DNA
D.
tRNA
Question #9
When amino acids are added to a growing peptide chain, this is called ____________________________.
A.
translation initiation
B.
transcription elongation
C.
translation elongation
D.
transcription initiation
Question #10
Which mutation is an example of a frameshift mutation?
A.
the substitution of two nucleotides
B.
the substitution of one nucleotide
C.
the insertion of one nucleotide
D.
the deletion of three nucleotides
Question #11
If there is a mutation in the coding region of a gene that deletes 2 DNA nucleotides, this is an example of a(n) _______________________.
A.
silent mutation
B.
point mutation
C.
insertion
D.
frameshift mutation
Question #12
In prokaryotes, a repressor protein prevents transcription by binding to a specific DNA sequence, called the _________________________.
A.
terminator
B.
promoter
C.
activator
D.
operator
Question #13
In a eukaryotic cell, events that happen ____________________________transcription can influence how much gene expression occurs, including how much of the final gene product (protein or RNA) is present in the cell.
A.
before
B.
before, during, and after
C.
after
D.
during
Question #14
In prokaryotes, turning on a gene or genes might help the organism survive by allowing it to ____________________________.
A.
express each gene an equal number of times
B.
respond to changes in the environment
C.
survive without food
D.
rearrange the order of its genes
Question #15
Since Watson and Crick described DNA in 1953, which of the following statements might best explain why the function of small RNAs is still being explained?
A.
The functions of small RNAs could not be approached until the entire human genome was sequenced.
B.
Changes in technology as well as our ability to determine how much of the DNA is expressed have now made this possible.
C.
Ethical considerations prevented scientists from exploring this material until recently.
D.
As RNAs have evolved since that time, they have taken on new functions.
Question #16
When compared to a eukaryotic cell, a prokaryotic cell usually has ______________________ DNA.
A.
no
B.
less
C.
the same amount of
D.
more
Question #17
If the pairs of homologous chromosomes in a cell do not separate during meiosis, the cell will have an entire extra set of chromosomes. This is called _________________________________.
A.
gene duplication
B.
unequal crossing over
C.
exon shuffling
D.
polyploidy
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