In a bacterial cell, the chromosome is located in a region called the ______.

a. nucleoid
b. nuclei
c. nucleolus
d. nucleus


Answer: a. nucleoid

Biology & Microbiology

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The risk of heart attacks and stroke can be reduced by avoiding the conditions that damage the blood

vessel artheroslerotic plaque.

Indicate whether the statement is true or false.

Biology & Microbiology

This animal has a small coelom, soft body, a

hinged two-part shell, and no distinct head. This animal is ___.

a. a clam b. a slug c. an octopus d. a planarian e. more than one of these

Biology & Microbiology

Signaling proteins that alert the immune system an infection is present and that sometimes directly fight pathogens are the:

A) histamines. B) complement proteins. C) antibodies. D) cytokines. E) antihistamines.

Biology & Microbiology

During an action potential, repolarization occurs _____

when sodium diffuses into the cell when potassium diffuses out of the cell when calcium ions diffuse into the synaptic knob only where sodium-potassium pumps are absent

Biology & Microbiology