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- 1. Multiple Choice
(Select all that apply): The following statements are true about DNA.
DNA strands run in antiparallel, or opposing, directions within the double helix structure.
Purines include adenine and guanine.
Pyrimidines include cysteine and uracil.
Across two strands, purines pair with purines while pyrimidines pair with pyrimidines.
- 2. Fill in the Blank
In RNA, the 5-carbon sugar component is called __________. (Hint: 6 letters)
- 3. Multiple Choice
Which of the following statements is TRUE about DNA replication in eukaryotes?
Primase acts by breaking DNA strands along a tightly wound helix.
The lagging strand forms in the directions toward the replication fork.
DNA ligase untwists the double helix at the replication fork.
DNA polymerase cannot initiate synthesis; it can only add nucleotides to a preexisting chain.
- 4. Multiple Choice
Which of the following corresponds to a DNA strand read as:
5'-TCG GAC-3'
Corresponding mRNA:
5'-AGC CUG-3'
Corresponding tRNA:
UCG CAG
Corresponding mRNA:
3'-AGC CUG-5'
Corresponding tRNA:
AAA UAA
- 5. Multiple Choice
(Select all that apply): Which of the following are stop codons?
UUG
UAG
UAA
UGA
- 6. Multiple Choice
(Select all that apply): TRANSLATION consists of which of the following components?
Initiation
Elongation
methionine
Termination
- 7. Multiple Choice
Which of the following is true of TRANSLATION?
Codons of mRNA are "translated" into a DNA sequence.
GTP is a key "energy source" for translation.
tRNA is broken down immediately upon single use, like mRNA.
AUG and AUA are both start codons.
- 8. Multiple Choice
(Select all that apply): TRANSCRIPTION consists of which of the following components?
RNA polymerase
Initiation
Elongation
Abbreviation
- 9. Multiple Choice
(Select all that apply): Which of the following consequences could occur from a gene mutation?
A wobble, or silent mutation
A polypeptide is formed
A polypeptide is not formed
A frameshift
- 10. Multiple Choice
TRANSLATION primarily occurs in which part of a eukaryotic cell?
In the stroma
In the cytoplasm
In the nucleolus
In the lysosomes
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