A molecule moves across a membrane from a lower to a higher concentration with the aid of a
membrane
protein. This process is known as:
A) chemiosmotic coupling
C) active transport
B) diffusion
D) facilitated transport - correct answer ✔✔C) active transport
Which of the following will cause the opening or closing of a gated ion channel?
A) pH change
B) phosphorylation
C) voltage change
D) ligand binding
E) all of the above - correct answer ✔✔E) all of the above
Which amino acid in the aquaporin channel hydrogen bonds with water to prevent the movement of
protons?
A) Asn B) Leu C) Phe D) Val E) Ile - correct answer ✔✔A) Asn
Which of the following second messengers would NOT be found free floating in the cytosol?
A) DAG B) Ca2+ ions C) cAMP D) IP3 - correct answer ✔✔A) DAG
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 or Stuvia-credit 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 Sakayobako30. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.