Where does photosynthesis take place in cyanobacteria?

a. plasma membrane
b. Golgi bodies
c. cytosol
d. mitochondria
e. chloroplasts


ANSWER: a

Biology & Microbiology

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PAHs (polycyclic aromatic hydrocarbons) found in tobacco smoke preferentially bind to regions within the ________ and trigger base substitutions.

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When ____ cells mature, they develop thick secondary walls strengthened by lignin and cellulose and die, leaving

empty cells that serve as pipelines for water and mineral transport.

a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members

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In humans, ____________________ of the 20 amino acids are "non-essential" amino acids. Fill in the blank(s) with the appropriate word(s)

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An important mediator of a type I hypersensitivity reaction is

a. complement. b. antigen-antibody immune complexes. c. T cells. d. histamine.

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