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WorksheetsDNA Replication
Total questions: 15
Worksheet time: 14mins
What are the basic building blocks of a DNA molecule?
amino acids
nucleotides
deoxyribose sugar
nitrogenous bases
What are the components of a nucleotide? (Click all that apply)
deoxyribose sugar
nitrogenous bases
phosphate
amino acid
What makes up the sides of the DNA molecule?
sugar and phosphates
bases and phosphates
sugar and bases
bases
What makes up the "rungs" of the DNA molecule?
sugar and phosphates
bases and phosphates
sugar and bases
bases
Adenine (A) joins to (a)
Thymine (T) joins to (a)
Cytosine (C) joins to (a)
Guanine (G) joins to (a)
What does the helicase enzyme do during DNA replication?
separates the two strands of DNA
adds nucleotides to the growing strand of DNA
builds nucleotides
digests DNA
What does the DNA polymerase enzyme do during DNA replication?
separates the two strands of DNA
adds nucleotides to the growing strand of DNA
builds nucleotides
digests DNA
The diagram represents a portion of one strand of a DNA molecule. Which of the four DNA strands match the strand in the diagram by base pairing?
GGTGACT
TTGTCAG
GGTCGAT
CCTAGTG
Reorder the following:
During S phase, the two strands of the double helix are separated by helicase
DNA polymerase synthesizes two strands complementary to each original strand.
DNA polymerase proofreads each DNA strand.
The two copies of DNA with a complete set of genes separate from each other in anaphase.
What is needed for DNA replication? Select all that apply.
helicase to break the hydrogen bonds of the DNA molecule
free nucleotides
free amino acids
polymerase to join nucleotides onto the template DNA strand
The principal enzyme involved in DNA replication is called (a) . The enzyme joins (b) to synthesize a new (c) strand of DNA . DNA replication is called (d) , because each new DNA molecule is made up of one original and one new strand.
The diagram represents a model of DNA replication. What can you conclude about DNA replication from this diagram?
Both original strands are replicated in the same direction.
The two original strands are replicated in opposite directions.
