Which of the following macromolecules can be found in, or associated with, cell membranes? (Select all that apply) Carbohydrates Proteins Nucleic acids Lipids 2. The molecule
1. Which of the following macromolecules can be found in, or associated with, cell membranes?
(Select all that apply)
Carbohydrates
Proteins
Lipids
2.
The molecule cholesterol can be found in membranes of..?
a. Animal cells
b. Bacterial cells
c. Plant cells
d. Cholesterol is not found in cell membranes
3. Peripheral membrane.. ( proteins pick one)
a Cross through the entire distance of the membrane
b Are fully embedded in the membrane
c Associate with the polar head groups of the phospholipids
d Associate with the nonpolar tails of the phospholipids
e Are covalently attached to a lipid anchor
4 Transmembrane proteins.. (one answer)
are membrane proteins attached to carbohydrates
Associate with the polar head groups of the phospholipids
Are covalently attached to the phospholipids
Cross through the entire distance of the membrane
Are proteins required to maintain membrane strength
5. Which of the following is a phosphate group?
a)-PO42-
b)-CH3
c)-NH3
d)-COOH
e)-OH
Cell membrane is the outer covering of the layer of the cell which separates the cell contents from the extracellular fluid. It is a kind of semipermeable barrier that allows only certain molecules to pass through it and retains other large molecules such as proteins from passing through it.
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