Unit 2: DNA, Proteins, and Cell Division

What direction is DNA replicated in?

• 3' to 5'

• 5' to 3'

• DNA to RNA

• DNA to DNA

Which of the following enzymes correctly identifies the DNA base needed to complete replication and builds a new DNA strand?

• DNA Helicase

• Ligase

• RNA Polymerase

• DNA Polymerase

Which enzyme glues the short Okazaki fragments together?

• Helicase

• Ligase

• RNA Polymerase

• DNA Polymerase

Which of the following enzymes correctly identifies the RNA base needed to complete transcription and builds an mRNA strand?

• DNA Helicase

• Ligase

• RNA Polymerase

• DNA Polymerase

Which enzyme unzips the DNA double helix?

• Helicase

• Primase

• RNA Polymerase

• DNA Polymerase

Which enzyme adds an RNA primer to tell other enzymes where to start Replication or Transcription?

• Helicase

• Primase

• RNA Polymerase

• DNA Polymerase

Below is an original strand of DNA. Using the original strand of DNA, which complementary strand below is correct? TAGCCAGCATAGAGCG

• TGAGCTAGCTAGCTAG
• ATCGGTCGTATCTCGC
• TTAGCTCGCTGATCGC

DNA molecules differ from RNA molecules in which of the following ways?

A. DNA molecules contain a different type of sugar than do RNA molecules.
B. DNA molecules contain the nitrogenous base cytosine, which RNA molecules do not.

C. RNA molecules contain the nitrogenous base uracil, while DNA molecules do not

D. DNA is double stranded, RNA is single stranded

• A, B, and D only

• A, C, and D only

• B and D only

• ALL

Below is an original strand of DNA. Using the original strand of DNA,

which complementary strand of RNA would be transcribed?

3’ – TAGCCAACGTACGTACG – 5’

• 5’ – AUCGGUUGCAUGCAUGC – 3’
• 3’ – AUCGGUUGCAUGCAUGC – 5’
• 5’ – ATCGGTTCGATGCATGC – 3’
• 3’ – ATCGGTTCGATGCATGC – 5

Proteins are long strands of:

• Nucleotides
• Amino Acids
• Carbohydrates
• Lipids