USMLE

USMLE practice questions, page 5 of 25, with answer review and explanations.

Question 21

Which of the following is the mRNA start codon in most cases?

  1. UAA
  2. AGU
  3. AUG
  4. UGA

Question 22

Which of the types of RNA is the smallest?

  1. mRNA
  2. tRNA
  3. rRNA

Question 23

Which of the following is not considered a pyrimidine?

  1. C
  2. T
  3. U
  4. G

Question 24

Which of the following is paired correctly?

  1. A-G
  2. C-G
  3. A-U
  4. G-T

Question 25

Which of the following characterizes a Western blot?

  1. Antibody/protein hybridization
  2. DNA/RNA combination
  3. RNA transcription
  4. Polymerase chain reaction