Return to MCAT® Blog
Homepage
MCAT Biology Question – pH in the Stomach
- by
- Jan 08, 2017
- MCAT Question of the Day
- Reviewed By: Liz Flagge
The pH inside the stomach is very closely regulated. Which of the following is a major function for the pH in the stomach?
A. Neutralizing the acidity of the chyme entering it
B. Denaturing proteins to allow for digestive processes
C. Activating trypsinogen into the active form
D. Establishing a proton gradient for ATP production
Click for Explanation
This question tests your knowledge of the physiological functions that result from the low pH within the stomach cavity. While the acid environment serves several functions, one important one is denaturing the tertiary structure of proteins in the food. This lets proteases break up the protein into smaller peptides.
A. The chyme is the substance that leaves the stomach, not enters it.
B. Correct
C. Trypsinogen is found in the small intestine, not the stomach.
D. A proton gradient is used for ATP production in the mitochondria, not the lumen of the stomach.
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.
Related Posts
Search the Blog
Free Consultation
Interested in our Online MCAT Course, One-on-One MCAT Tutoring or Med admissions packages? Set up a free consultation with one of our experienced Senior Student Advisors.
Schedule NowPopular Posts
-
-
MCAT Blog What's on the MCAT? -
-
-
MCAT Blog How to Review MCAT Full Lengths
Free MCAT Practice Account
Need 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