What 3 things is the lipid bilayer composed of?
What will be an ideal response?
1) phospholipids
2) cholesterol
3) proteins
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If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
A. isotonic. B. hypertonic. C. hypotonic. D. osmosis.
In a less severe form of combined immune deficiency, the individual
A) has normal numbers of T and B cells. B) has no white blood cells. C) has some T cells but lacks B cells. D) lacks both T and B cells.
Amoeboid protozoans
A) may exist in the environment encased in a tough protective layer called a cyst. B) move via cilia. C) are always free-living. D) move via cilia and are always free-living. E) move via cilia, are always free-living and may exist in the environment encased in a tough protective layer called a cyst.
Which of the following is false about the E. coli Lac operon?
A. it is an example of negative control B. the presence of lactose acts as an inducer C. the repressor binds to the operator D. the mRNA for the receptor binds to the operator