DNA Replication
What is DNA?
Mitosis
DNA Replication and Repair
Steps of DNA Replication
Enzymes of DNA Replication
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Quiz on DNA Replication
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DNA Replication Quiz
Instructions:
Click the answer button to see the correct answer.
DNA replication occurs in the
Nucleus
Extracellular fluid
On the ribosome surface
Cytoplasm
Answer
a
After replication, the daughter DNA molecules
One strand contains only parental nucleotides and the other is assembled newly
The two strands contain nucleotides randomly assembled.
Have all their nucleotides from the parent DNA
Each strand contains a mixture of parental and newly assembled nucleotides.
Answer
c
In DNA replication the new chain grows in a
5' to 3' direction
3' to 5' direction
Depends on Okazaki fragments
Any direction
Answer
a
The enzyme that breaks the hydrogen bonds between the two DNA strands is called
Helicase
RNA polymerase
Ligase
DNA polymerase
Answer
a
The Okazaki fragments are connected by
Helicase
Ligase
RNA polymerase
DNA polymerase
Answer
b
Okazaki fragments are used to elongate
the lagging strand toward the replication fork
the lagging strand away from the replication fork
both strands in both directions
the leading strand toward the replication fork
the leading strand away from the replication fork
Answer
b
In DNA adenine always pairs with
guanine
thymine
uracil
cytosine
adenine
Answer
b
DNA replication is called semiconservative because _________ of the original duplex appears in the duplex formed in replication.
>none
most
all
half
Answer
d
Each unit of a nucleic acid consisting of a sugar, attached phosphate group, and base is a
genetisome
histone
nucleosome
nucleotide
nucleolus
Answer
d
A DNA molecule has the same amount of adenine and thymine.
True
False
Answer
b
Which statement about the elongation of the lagging strand during DNA replication is correct?
It progresses (grows) toward the replication fork.
It is synthesized continuously.
It is synthesized by DNA ligase.
It requires a short RNA primer to proceed.
Answer
d
If one side of a DNA molecule contains the following sequence of nucleotides, AGTCCG, the complementary sequence on the other side would be:
GCCTGA
CTGAAT
none of the above
TCAGGC
AGTCCG
Answer
d
The two sides of the double helix structure of DNA are held together with hydrogen bonds.
True
False
Answer
d
A repeating DNA sequence at the end of chromosomes that prevents them from losing base pair sequences at their ends and from fusing together is called :
None of the above
Telomerase
Replicon
Telomere
Answer
d
During which stage of the mitotic cell cycle is DNA replicated?
Prophase
Metaphase
Telophase
Interphase
Cytokinasis
Answer
d
Adenine comprised 36% of the nitrogenous bases in the DNA of cells from a bacterial clone. What was the percentage of guanine in the DNA?
14%
16%
36%
50%
Answer
a
How many nitrogenous bases code for 1 amino acid?
1
2
3
4
Answer
a
DNA helicase is found where?
Replication Bubble
Replication Complex
Replication Fork
All of these
Answer
d
Which of the following best describes the arrangement of the sides of the DNA molecule?
Twisted
Antiparallel
Bonded
Alternating
Answer
b
How many different amino acids are there?
1
5
20
100
Infinite
Answer
c