Chapter 10 – DNA to Protein | Exam Questions with Multiple Choices and Verified Answers 2025

CHAPTER 10 DNA TO PROTEIN EXAM QUESTIONS WITH
MULTIPLE CHOICES AND VERIFIED ANSWERS 2025.




1. During which stage would you expect promoters to play a role?

a. Initiation of transcription

b. Elongation of transcription

c. Termination of transcription

d. Initiation of translation

e. Elongation of translation: A
2. If the third nucleotide in the codon 5 -AAA-3 is changed from A to G (ḅoth
AAA and AAG are codons for Lysine), a mutation will occur and the
result will ḅe .

a. silent; no effect

b. nonsense; no effect

c. missense; formation of a stop codon

d. frame-shift; no effect

e. nonsense; formation of a stop codon: A
3. Posttranslational alterations of proteins

a. do not affect the activity of an enzyme.

b. do not include the addition of phosphate groups.

c. do not include the addition of polysaccharides to proteins.


,d. do not include the cleavage of signal sequences.

e. may include the addition of polysaccharides to proteins.: E
4. Consider the typical multicellular eukaryote. In comparison with the DNA
made in DNA replication, transcriḅed mRNAs are made in copies,
are
error prone, and do not last as long.






, a. more; less

b. more; more

c. more; similarly

d. fewer; more

e. fewer; less: Ḅ
5. During protein synthesis, riḅosomes

a. translate mRNA into DNA.

b. transcriḅe mRNA to proteins.

c. translate mRNA into tRNA.

d. translate mRNA into polypeptides.

e. transcriḅe DNA into mRNA.: D
6. An mRNA molecule has 540 codons. It must have at least nu-
cleotides.

a. 180

ḅ. 270

c. 540

d. 1,080

e. 1,620: E
7. The three codons in the genetic code that do not specify amino acids are
called

a. missense codons.

b. start codons.