Exam (elaborations)
Test Bank for Beckers World of the Cell: chapter 8a (10th Edition by Jeff Hardin)
- Course
- Institution
Test Bank for Beckers World of the Cell: chapter 8a (10th Edition by Jeff Hardin)
[Show more]
Content preview
Test Bank for Beckers World of the Cell:chapter 8a (10th Edition by Jeff Hardin)
1) Of the following molecules, which would NOT be expected to be moved across a membrane
by simple diffusion?
A) oxygen
B) fatty acids
C) water
D) glucose
E) dimethylurea - ANSd
2) One mechanism by which ions are specifically transported into the cell is the
A) gated channel.
B) alternating conformation model.
C) carrier protein transport.
D) uniport transport model.
E) all of the above - ANSa
(ion channel = transmembrane proteins that allow rapid passage of specific ions)
(gated channel = the pore opens and closes in response to some stimulus)
3) In examining glucose transport into a cell, the immediate phosphorylation of glucose following
its entry into the cell
A) keeps the glucose from being transported back out of the cell.
B) allows the cell to maintain higher levels of glucose outside the cell.
C) puts glucose into a form for use in cellular respiration.
D) puts glucose into a form to be stored.
E) all of the above - ANSe
4) In bacteria, the porins have the unique ability to transport
A) all hydrophilic molecules.
B) hydrophilic molecules of a particular size.
C) all hydrophobic molecules.
, D) hydrophobic molecules of a particular size.
E) any molecule, regardless of properties or size. - ANSb
(porin molecules are not an alpha helix but a so callad beta barrel)
(beta barrel = a water-filled pore, which allows passage of varous hydrophilic solutes, the size is
limitited by the size of the pore)
5) In the kidney, the specialized transport proteins that allow for very rapid fluid movement into
or out of cells are known as
A) aquaporins.
B) porins.
C) ionophores.
D) anion exchange proteins.
E) osmosins. - ANSa
(aquaporins = facilitate the rapid movement of water molecules into or out of cell in specific
tissues that require this capability)
(c: ionophores = molecules which transport ions across a cell membrane, most bacteria?)
6) The movement of water through a membrane, from an area of high concentration to an area
of low
concentration, is known as
A) active transport.
B) facilitated transport.
C) passive transport.
D) osmosis.
E) photolysis. - ANSd
(osmosis = movment of water through a semipermeable membrane driven by difference in
solute concentration on two sides of the membrane)
7) Which of the following is/are TRUE with regard to water movement in osmosis?
A) hypotonic → hypertonic
B) hypertonic → hypotonic
C) isotonic → hypotonic
D) hypertonic → isotonic
E) both choices C and D - ANSa
(hypo = lower / less)
(hyper = greater / very high)
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 AllLegitExams. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
