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Worksheets8.3 DNA Replication
Total questions: 15
Worksheet time: 9mins
The process that makes an exact copy of a cell’s DNA is called
conservation.
preservation.
replication.
synthesis.
What are the main functions of DNA polymerase?
breaks hydrogen bonds and exposes bases
holds DNA strands apart and attracts bases
zips and unzips the double-stranded DNA
binds nucleotides and corrects base pair errors
What are the main functions of helicase?
breaks hydrogen bonds and exposes bases
holds DNA strands apart and attracts bases
forms hydrogen bonds to make double-stranded DNA
binds nucleotides and corrects base pair errors
What are the main functions of single stranded binding proteins?
breaks hydrogen bonds and exposes bases
holds DNA strands apart
forms hydrogen bonds to make double-stranded DNA
binds nucleotides and corrects base pair errors
Which of the following events occurs directly after a DNA molecule is unzipped?
Mismatched nucleotide bases are identified and replaced.
Free-floating nucleotides pair up with exposed bases.
Identical double-stranded DNA molecules are formed.
Enzymes break hydrogen bonds between base pairs.
The process of making new DNA molecules is semiconservative. This means that every new DNA molecule is composed of
two completely identical strands of DNA.
one original and one new strand of DNA.
one strand of DNA and one strand of RNA.
two strands that mix original and new DNA
When new DNA molecules are formed, almost all errors are detected and fixed by
the correct nucleotide.
the sugar-phosphate backbone.
DNA polymerase.
one DNA strand.
Figure 8.1 shows a single strand of DNA. Choose the first three nucleotides of the other DNA strand.
GGT
CCT
GGC
TTA
In humans, where does DNA replication take place?
cytoplasm
ribosome
nucleus
vacuole
When does replication occur?
during the cell’s S phase
when nucleotides float in the nucleus
during the cell’s M phase
when tRNA unzips DNA
Which of the following enzymes is responsible for joining the Okazaki fragments?
DNA polymerase
Helicase
Primase
Ligase
primase
DNA polymerase
ligase
Site where replication begins
Polymerase action site
Replication fork
Replication Origin
In the front
