What happens to a retinal photopigment when it captures a photon?  

A.  It releases an electron.
B.  It fluoresces.
C.  It changes shape.
D.  It begins to vibrate.
E.  It does nothing.


C.  It changes shape.

Biology & Microbiology

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What growth conditions would you use to enrich for ammonia-oxidizing bacteria?

A) aerobic mineral media with ammonia and bicarbonate incubated in the dark B) anaerobic mineral media with acetate and ammonia incubated in the dark C) aerobic mineral media with acetate and ammonia, incubated in the dark D) anaerobic mineral media with ammonia and nitrate incubated in the dark

Biology & Microbiology

Simple lipids contain carbon, hydrogen, and oxygen in a 1:2:1 ratio

Indicate whether this statement is true or false.

Biology & Microbiology

Type 1 diabetes ____

a. is characterized by normal insulin levels b. is characterized by cells that do not respond to insulin c. is the more common form of diabetes d. is usually controlled with a strict diet e. usually occurs in early childhood

Biology & Microbiology

An agent that can cause birth defects is known as a(n)

a. teratogen. b. mutagen. c. carcinogen. d. haptene. e. allergen.

Biology & Microbiology