Return to Blog
Homepage
PCAT Biological Processes – Cellular Activity
- by
- Oct 24, 2017
- PCAT Question of the Day
In nerve cells, microtubule-associated proteins (MAPs), most notably MAP2 and MAP tau, act to stabilize microtubules. In a mouse model, a mutant is developed that vastly reduced function across all families of MAPs, leading to increased microtubule degradation. Which cellular activity would likely be most affected?
A) Cardiac muscle contraction
B) Transcription of mRNA from DNA
C) Krebs cycle
D) Meiosis
Explanation
Microtubules are a component of the cytoskeleton and central to a number of cellular processes that involve movement, such as mitosis and meiosis. They provide the framework for the organization and separation of chromosomes and sister chromatids during that process. Thus (D) is the correct answer.
A: The movement created by muscle cells depends on actin and myosin, rather than microtubules.
B: Transcription is primarily regulated by enzymes, not microtubules.
C: The Krebs cycle depends primarily on mitochondria, not microtubules.
Related Post
Search the Blog
Free Consultation
Interested in our Online MCAT Course or one of our One-on-One MCAT Tutoring packages? Set up a free consultation with one of our experienced Academic Managers!
Schedule NowPopular Posts
-
MCAT Blog How To Prep For The MCAT During COVID-19 -
-
-
MCAT Blog How is the MCAT Scored? -
MCAT Blog Should You Retake the MCAT? -
-
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
Submit a Comment