Which of the following is NOT true of the plasma membrane?

A. It is composed of an extracellular and intracellular layer of phospholipids.
B. The extracellular and intracellular layers or leaflets are highly symmetrical.
C. The membrane contains peripheral proteins.
D. Integral proteins span through the membrane.
E. The membrane contains glycolipids and glycoproteins.


B. The extracellular and intracellular layers or leaflets are highly symmetrical.

Biology & Microbiology

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Endosymbiosis of cyanobacteria is widely accepted as an explanation for the development of chloroplasts.  The presence of endosymbiotic cyanobacteria provided a cell with the advantage of ________.

A. a membrane-bound nucleus B. tolerance to oxygen C. an electron transport chain D. simple, rapid gene transfer E. photosynthesis

Biology & Microbiology

what is EBV?

What will be an ideal response?

Biology & Microbiology

The region of the small intestine with the lowest pH is the ________

Fill in the blank(s) with correct word

Biology & Microbiology

A mutation that involves one or a few nucleotides is called

a. A mutagen b. An inversion c. A point mutation d. A translocation

Biology & Microbiology