The picture below shows an enzyme unwinding and unzipping DNA.

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​What is the name of this enzyme?

• DNA Helicase

• DNA Ligase

• DNA polyermase

• RNA Polymerase

Which enzyme is responsible for adding the free nucleotides to the replicating DNA? ​

• DNA Helicase

• DNA Ligase

• DNA polyermase

• RNA Polymerase

Which is the first step?

• DNA Helicase unwinds original DNA strand

• RNA Primase lays down RNA primer for new nucleotide bases.

• DNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

Which letter in the picture below depicts the leading strand in DNA replication?

• A

• C

• B

• None of the above

Which letter in the picture below depicts the replication fork in DNA replication?

• A

• C

• B

• None of the above

Tags

NGSS.HS-LS3-2

Okazaki fragments appear on which strand of DNA during DNA replication?

• lagging

• leading

The two strands of a DNA molecule are held together by ________ bonds between their base pairs.

• covalent
• hydrogen
• ionic
• peptide

What part of a nucleotide accounts for the genetic variation between individuals?

• phosphate
• nitrogenous base
• deoxyribose
• sugar

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

If a segment of double-stranded DNA has 40 percent A, how much of it is C?

• 40
• 10
• 15
• 20

If one strand of DNA has the sequence TTACCG, the sequence of the other strand of the same molecule will be

• AATGGC
• TTACCG
• AACGGC
• AATGGG