DNA Replication and Protein Synthesis

What are the bonds that join the two nitrogenous bases in the middle of the DNA structure?

Which nucleotides are purines? (choose at least one)

• adenine

• guanine

• cytosine

• thymine

• uracil

How many strands make up the helix in DNA?

What is the sequence of bases on the complementary strand for the following DNA sequence?

AGTGCT

A strand of DNA is 20% Thymine. What percent of the strand is Cytosine?

What is the first step of DNA replication?

• An enzyme (topoisomerase) relieves supercoiling

• A primer begins to add complementary bases

• An enzyme (ligase) seals two strands of DNA together

• An enzyme (Helicase) separates the double helix

Which nitrogenous base is present in RNA but not DNA?

• cytosine

• thymine

• uracil

• adenine

• guanine

Transcribe the following DNA sequence into mRNA:

ACTAGT

Where in the cell does translation take place?

• cytoplasm

• nucleus

• cell membrane

• nucleolus

How many nucleotides make up an amino acid?