A single-cell freshwater organism, such as a

protistan, is transferred to saltwater. Which of the
following is likely to happen?
a. The cell bursts.
b. Salt is pumped out of the cell.
c. The cell shrinks.
d. Enzymes flow out of the cell.
e. All of these happen.


Answer: c

Biology & Microbiology

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Nearly all cells use ATP as their primary energy source. This is evidence that ___________________

A. life continues to evolve and use novel energy sources B. ATP evolved recently (in the last 100 years) as a potential source of energy C. the use of ATP by cells began eons ago and has been conserved D. only eukaryotic cells can produce ATP E. fossil fuels are composed of ATP

Biology & Microbiology

A characteristic that an organism displays is called __________

A. a gene B. a chromosome C. DNA D. gene expression E. a trait

Biology & Microbiology

Uracil will pair with

a. ribose. b. adenine. c. cytosine. d. thymine. e. guanine

Biology & Microbiology

When substrate level phosphorylation occurs, it means what?

A. ATP is converted into ADP plus a phosphate group. B. NADH is converted into NAD + H. C. ADP is converted into ATP by addition of a phosphate group. D. NAD is converted into NADH. E. AMP is converted into NAD by adding a phosphate group.

Biology & Microbiology