The substances in cell membranes that form a barrier to the movement of materials across the membrane are
A) carbohydrates.
B) nucleic acids.
C) lipids.
D) external proteins.
E) internal proteins.
C
Biology & Microbiology
You might also like to view...
What evidence is there that choanoflagellates were the ancestors to animals? What will be an ideal response?
Biology & Microbiology
Animals that feed on bacteria and fungi are called ________
Fill in the blank(s) with correct word
Biology & Microbiology
Cells acquire low-density lipoproteins (LDLs) by
A) diffusion. B) receptor-mediated endocytosis. C) exocytosis. D) phagocytosis.
Biology & Microbiology
Paranthropus robustus and Australopithecus africanus are always found in the same deposits
a. true b. false
Biology & Microbiology