AP Biology: DNA, RNA, and Protein Synthesis

Which two DNA nucleotides are collectively called purines?

• adenine & thyamine

• adenine & guanine

• thytosine & guanine

• thyamine & guanine

What nucleotides base that can only be found in DNA?

• adenine

• guanine

• uracil

• thyamine

Substances that cause mutations are called ___.

• anticodons

• mutagens

• mutations

• chromosomes

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

This is a short stretch of RNA that is used to start a complementary strand of DNA during replication.

• Liger

• Primer

• Okazaki fragment

• Initiator

The difference in the way that the leading and lagging strands are made is a result of...

• DNA polymerase

• Helicase

• Ligase

• RNA Polymerase

• Topoisomerase

DNA polymerase moves toward the replication fork when creating the _____ strand

• leading

• lagging

This enzyme joins fragments of the lagging strand.

• DNA polymerase

• Helicase

• Ligase

• RNA Polymerase

• Topoisomerase

A new strand of DNA is created in the ____ direction during DNA replication.

• 3' to 5'

• 5' to 3'

Each daughter DNA molecule is composed of...

• one original strand and one new strand

• two new strands

• two original strands

The _____ strand is made in short fragments during DNA replication

• leading

• lagging