Which of the following is true of the plasma membrane?

A) It is a rigid, nonchanging structure.
B) Its capabilities are primarily determined by carbohydrates in the membrane.
C) It controls the passage of substances into and out of the cell.
D) It only allows hydrophilic materials to pass through.


Answer: C

Biology & Microbiology

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Ag-Ab binding may result in

A. neutralization. B. immobilization. C. agglutination. D. opsonization. E. All of the choices are correct.

Biology & Microbiology

Biochemist Erwin Chargaff found that in DNA there was a special relationship between individual bases that we now refer to as Chargaff's rule. His observation was that

A. A + T = C + G. B. C = T and A = G. C. A = T and G = C. D. G = T and C = A.

Biology & Microbiology

How might L1 retrotransposons be useful as a potential gene therapy agent? What are the problems with using this strategy for gene therapy?

What will be an ideal response?

Biology & Microbiology

The events of ________ are initiated at sequences called origins

A) DNA replication B) translation C) splicing D) transcription E) transposition

Biology & Microbiology