Eukaryotic cells, but not prokaryotic cells, contain ribosomes.

a. true
b. false


Ans: b. false

Biology & Microbiology

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The CD4 molecule is

A) an HIV surface glycoprotein. B) a cell-surface protein receptor for HIV. C) found only on T-helper cells. D) an HIV surface glycoprotein that is found only on T-helper cells.

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Stem cells are cells that are capable of:

A. producing an entire organism. B. producing the three germ layers. C. differentiating into different cell types. D. differentiating into a limited number of different cell types. E. differentiating into any type of cell.

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Which of the following can serve as channels or pumps within the cell membrane?

a. integral proteins b. glycoproteins c. cholesterol d. phospholipids

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What number are the Lipopolysaccarides ?

What will be an ideal response?

Biology & Microbiology