MCAT Biology Question — Protein Synthesis
- Mar 14, 2017
- MCAT Question of the Day
Synthesis of intracellular proteins is initiated at which of the following sites?
- Free-standing ribosomes
- Rough endoplasmic reticulum
- Golgi apparatus
- I only
- II only
- I and II
- I, II, and III
Click for Explanation
- True. Translation of intracellular proteins is always initiated on free-free standing ribosomes in the cytosol.
- False. Proteins that are destined for secretion are translated on ribosomes bound to the rough endoplasmic reticulum, but proteins with an intracellular destination are synthesized on free ribosomes.
- False. The Golgi apparatus is responsible for packaging proteins that are to be secreted by the cell.
Answer: A. See explanations above.
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