movement of sucrose molecules across the plasma membrane takes place through ect one: a. Phospholipid monolayer b. Phospholipid embedded cholesterol c. Phospholipid embedded proteins d. Phospholipid bilayer e. Phospholipid embedded glycoproteins Time left

movement of sucrose molecules across the plasma membrane takes place through ect one: a. Phospholipid monolayer b. Phospholipid embedded cholesterol c. Phospholipid embedded proteins d. Phospholipid bilayer e. Phospholipid embedded glycoproteins Time left

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

e movement of sucrose molecules across the plasma membrane takes place through
ect one:
a. Phospholipid monolayer
b. Phospholipid embedded cholesterol
c. Phospholipid embedded proteins
d. Phospholipid bilayer
e. Phospholipid embedded glycoproteins
Time left a

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Which of the following is an incorrect description of components of the biological membrane? a. Hydrocarbon tail without carbon-carbon double bonds is saturated with respect to hydrogen. b. The movement of proteins in a bilayer can be monitored using FRAP С. Most of the lipids and some of the proteins cannot move sideways in the plane of the membrane and mostly a lipid may 'flip-flop' across the membrane from one phospholipid layer to the other O d. Cholesterol is a steroid which is wedged between phospholipid molecules of the plasma membranes of animal cells e. A kink in one of the hydrocarbon tails results from the presence of carbon-carbon double bonds and causes increased fluidity of the membrane
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