AP Biology DNA History Structure and Replication

The enzyme that unzips the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase

In what phase of the cell cycle does DNA replication take place?

• G1

• S

• G2

• M

The process of DNA replication is called semi conservative because it results in

• none of these

• Two DNA molecules.  One original molecule and one with two new strands

• two exact copies with new strands

• two identical molecules, each with 1 original strand and one new.

What is A?

• Leading strand

• Lagging strand

• Okazaki Fragments

• DNA plymerase

Which is the last step of DNA replication?

• RNA Helicase unwinds original DNA strand

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

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

• Ligase knits together fragments on lagging strand

What is the principal enzyme involved in DNA replication

• glucose

• fructose

• DNA Polymerase

• Lactase

DNA replication is ​ (a)   . Each side is used as a ​ (b)   . DNA ​ (c)   so when ​ (d)   takes places each new cell as an ​ (e)   copy.

• semiconservative

• template

• unravels

• mitosis

• identical

• meiosis

• nonidentical

You are given the DNA strand 5'ATGCTCAGCTGA3'. What is the corresponding DNA strand?

• 5'UACGAGUCGACU3'

• 5'TACGAGTCGACT3'

• 3'UACGAGUCGACU5'

• 3'TACGAGTCGACT5'

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'

• 3' T T T A A A G 5'

• 5' A A A T T T C 3'

• 3' U U U A A A G 5'

The 5' end of DNA is marked by a(n)

• Phosphate Group

• Hydroxyl Group

• Purine

• Pyrimidine

Tags

NGSS.HS-LS1-1