This is a nucleotide containing molecule that is commonly used to carry electrons in the cell. 

A. ADP
B. ATP
C. NAD+
D. pyruvic acid


C. NAD+

Biology & Microbiology

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Cells surrounded by plasma membranes and no cell wall need to maintain a certain cell volume because an influx of water would cause the cell to explode. In order to reduce cell volume, these cells increase the activity of their sodium-potassium pumps.

a. true b. false

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DNA is associated with RNA and certain proteins forming chromatin

__________________ Indicate whether the statement is true or false.

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Approximately how many species of fungi are known to cause disease in humans?

a. 5 b. 50 c. 1000 d. more than 1500

Biology & Microbiology

Relapsing fever involves

A) Initial symptoms of fever, headache, fatigue. B) Campers and forestry personnel. C) Soft-bodied ticks transmitting Borrelia hermsii. D) Human body louse transmitting Borrelia recurrentis. E) All of these choices are correct

Biology & Microbiology