Which of the following occurs during a nerve impulse? 

A. Sodium ions flow out of the cell.
B. Sodium ions flow into the cell.
C. Potassium ions are pumped into the cell.
D. Potassium ions are pumped out of the cell.


B. Sodium ions flow into the cell.

Biology & Microbiology

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Despite having smaller genomes, the protozoans Paramecium and Trichomonas have significantly more genes than humans

Indicate whether the statement is true or false.

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In the Calvin cycle, NADPH is __________

A. oxidized B. reduced C. phosphorylated D. oxidized and reduced E. None of the answer options is correct.

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Which stretch of double-stranded DNA is most likely to be recognized as a restriction enzyme cutting site?

A. 5?-GAATCG-3? 3?-CTTAGC-5?. B. 5?-TCCGGA-3? 3?-AGGCCT-5?. C. 5?-ACCCCT-3? 3?-TGGGGA-5?. D. 5?-TTTTTT-3? 3?-AAAAAA-5?. E. 5?-GTTCAT-3? 3?-CAAGTA-5?.

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Bacteriophage that only exhibit lytic replication cycles are called ________ phages.

A. lytigate B. temperate C. intemperate D. virulent

Biology & Microbiology