What type of monomer does ATP represent?  

A.  nucleotide
B.  glycerol
C.  fatty acid
D.  monosaccharide
E.  amino acid


A.  nucleotide

Biology & Microbiology

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If a hypocotyl does not elongate during seed germination and early seedling growth, where will the cotyledons be?

A) above ground and above the seed B) above ground and below the seed C) in the ground with the seed coat

Biology & Microbiology

A research lab is trying to produce new antibiotics. They come up with drugs that detach the hydrophilic heads from the phospholipids in plasma membranes. This drug

A. would be highly toxic and completely useless for human beings-we also have plasma membranes with hydrophilic head groups! B. would be highly toxic only to bacteria, making it an excellent drug to develop and test further. Humans have a different phospholipid structure in their cell plasma membranes than bacteria. C. would generally not be toxic enough to damage Gram-negative bacteria, as their plasma membranes lie under a thick layer of peptidoglycan. D. would be highly toxic for human beings, but might be useful as a topical antibiotic skin cream. The top layer of skin cells is dead anyway, so it wouldn't matter if this damaged those cells. It could NOT be taken internally, though, by human beings.

Biology & Microbiology

A sample of single stranded RNA was found to have a cytosine content of 22%. What is the expected proportion of guanine in this RNA?

a. 22% b. 28% c. 44% d. cannot be determined from this information

Biology & Microbiology

Clownfishes are involved in a symbiotic relationship with:

a. corals. b. anemones. c. pearlfishes. d. sea cucumbers. e. sea fans.

Biology & Microbiology