MCMB Cell Structure and Function Exam Questions and Answers
7 views 0 purchase
Module
MCMB Cell Structure and Function
Institution
MCMB Cell Structure And Function
MCMB Cell Structure and Function Exam Questions and Answers
what is the function of the centrosome? - Answer-organize mitotic spindle important role in cytokinesis
describe the structure of a endoplasmic reticulum? - Answer-flattened sheets, sacs and tubes of membranes continuous with what?
- ...
MCMB 30 TEST QUESTIONS WITH
ANSWERS
What is juxtacrine signaling, and how does it differ from other forms of cell signaling?
Provide an example of a cellular process that relies on juxtacrine signaling. - Answer-
Juxtacrine signaling involves signaling molecules that target adjacent cells by
transmitting signals along cell membranes. An example is Notch signaling, which
regulates cell differentiation during development.
Briefly explain the different types of cell surface receptors involved in cell signaling,
including ion channels, enzyme-linked receptors, and G-protein coupled receptors. -
Answer-Cell surface receptors include ion channels, enzyme-linked receptors, and G-
protein coupled receptors. Ion channels allow ions to flow across the membrane,
enzyme-linked receptors activate intracellular enzymes upon ligand binding, and G-
protein coupled receptors activate intracellular signaling cascades through G proteins.
How do proteins with a single membrane-spanning segment transmit signals across the
membrane upon ligand binding? Discuss the importance of homo- or heterodimerization
in this process. - Answer-Proteins with a single membrane-spanning segment transmit
signals across the membrane upon ligand binding by undergoing homo- or
heterodimerization. This allows for conformational changes that propagate the signal
across the membrane.
Describe the structure and function of gated ion channels. Provide examples of
neurotransmitters that act on ion channels and explain how their binding affects ion
flow. - Answer-Gated ion channels have a specific structure that opens or closes in
response to ligand binding or changes in membrane potential. Examples include
neurotransmitter-gated ion channels such as nicotinic acetylcholine receptors.
What role does calcium (Ca2+) play as a second messenger in cell signaling? Discuss
how changes in cytosolic Ca2+ levels can affect cellular processes. - Answer-Calcium
(Ca2+) acts as a second messenger in cell signaling by regulating various cellular
processes. Changes in cytosolic Ca2+ levels can activate or inhibit enzymes and
proteins, leading to alterations in cell function.
Explain the concept of channelopathies and provide an example of a disease caused by
dysfunction in ion channel receptors. - Answer-Channelopathies are diseases caused
by dysfunction in ion channel receptors. An example is cystic fibrosis, caused by
mutations in the CFTR ion channel, leading to abnormal ion transport across cell
membranes.
Cellular information processing is accomplished via densely packed biomolecules,
diverse in structure and function. What are examples of regulatory enzymes in cell
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Perfectscorer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £10.58. You're not tied to anything after your purchase.
