MCAT Biology Question — Viruses
- Apr 25, 2018
- MCAT Question of the Day
A. DNA polymerase
C. Reverse transcriptase
D. None of the above; HIV can utilize its host cell for all of the proteins or enzymes it needs.
Click for Explanation
A. DNA polymerase, incorrect, DNA polymerase is the enzyme that builds the new DNA strand during replication in the nucleus. HIV does not have any particular need for DNA polymerase, and in any case, the host cell contains this enzyme.
B. helicase, incorrect, helicase is the enzyme that unwinds the DNA double helix for replication. This choice is incorrect for a similar reason as choice A.
C. reverse transcriptase, correct.
D. incorrect. While this choice is tempting, note that HIV infects human cells. Human cells typically do not create DNA from RNA, so they would not be expected to contain reverse transcriptase. This enzyme, then, must be provided by HIV itself.
Want more MCAT practice?
We’ve got options for every schedule and learning style!
From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.
Search the Blog
Free ConsultationSchedule Now
MCAT Blog How to Review MCAT Full-Lengths
Free MCAT Practice AccountNeed great MCAT practice?
Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.Learn More