Where do human nerve cells remain once they become mature and exit the cell cycle?

a. in G2
b. in G1
c. in G0
d. in S phase


Answer: c. in G0

Biology & Microbiology

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The use of metals as terminal electron acceptors is/are known as ________ because the metals are not incorporated into biomass.

A. Fenton reactions B. dissimilatory metal reduction C. metallo-neutral D. negative metallic addition

Biology & Microbiology

Ions important to plant nutrition are taken up by roots from the soil by ________.

A. Osmosis B. Simple diffusion C. Active transport D. Facilitated diffusion E. Endocytosis

Biology & Microbiology

Active transport is transport

a. in an energetically unfavorable direction always driven by hydrolysis of ATP. b. in an energetically unfavorable direction always coupled to another reaction or source of energy. c. in an energetically unfavorable direction driven only by the flow of another molecule across a membrane. d. in an energetically favorable direction coupled to the hydrolysis of ATP.

Biology & Microbiology

What is an innate, nondirectional response to a stimulus (such as increased movement under certain conditions) called?

A. Taxis B. Kinesis C. Migration D. Habituation E. Imprinting

Biology & Microbiology