An organism does not have a nucleus, carries on photosynthesis, and is very common. It is probably a 

A. cyanobacterium.
B. member of the Archaea.
C. a member of the Protista.
D. a member of the Plantae.


A. cyanobacterium.

Biology & Microbiology

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Proteins that are involved in the regulation of the cell cycle, and that show fluctuation in concentration during the cell cycle, are called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which kind of chemical reaction involves the attachment or removal of a phosphate group? 

A. oxidation-reduction B. acid phosphorylation C. phosphorylation D. hydrolysis

Biology & Microbiology

The most common first-position amino acid in bacterial proteins is

a. isoleucine. b. leucine. c. methionine. d. N-formylmethionine.

Biology & Microbiology

AIDS is the new name for what used to be called consumption.

Answer the following statement true (T) or false (F)

Biology & Microbiology