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WorksheetsDNA Replication
Total questions: 10
Worksheet time: 30mins
Why is DNA replication important to the cell cycle?
Multiplies the amount of DNA in the nucleus.
Creates new sequences of DNA that code for different proteins.
reduces the amount of DNA in the nucleus.
Ensures that cells will have the correct number of chromosomes.
What does DNA replication mean?
to multiply the number of
to make an exact copy
to reduce the number of
to change the shape of
When does DNA replication occur during the cell cycle?
mitosis
prophase
interphase
cytokinesis
Which type of bonds are broken between the base pairs?
covalent
ionic
carbon
hydrogen
What is the first step of DNA replication?
Helicase breaks the hydrogen bonds between the base pairs causing "unzipping".
DNA polymerase attaches the free nucleotides to unwound portions.
The sugar and phosphate parts of the free nucleotides bond together.
The replication fork reaches the end of the parent strand.
In step 2, what does the unwound portion of the parent strands attach to?
DNA polymerase
replication fork
It reattaches to the other unwound strand.
free nucleotides that are not hooked together
Choose the correct terms to fill in the blank.
"This type of replication is called _________ since the new molecules of DNA will have one side of the original DNA and the other side will be formed new from free nucleotides."
semi-conservative
DNA replication
mitosis
interphase
In step 3, what parts of the free nucleotides will bond together to form a complete strand?
nitrogenous bases
sugar and phosphate
sugar and DNA
DNA and phosphate
In step 4, what does DNA polymerase do?
attaches the sugar and phosphate
unzips the hydrogen bonds between base pairs
attaches free nucleotides
proofreads the new strands
Choose the correct complementary nucleotide sequence for the following:
CTACGAGGATAT
GATGCTCCTATA
GTTGCTCCTATA
TATGCTCCTATA
GATGCTCCTATT
