Specimens can be observed at the atomic level using a(n)
A. scanning electron microscope.
B. transmission electron microscope.
C. atomic force microscope.
D. All of the choices are correct.
E. None of the choices is correct.
C
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The mitotic stage in which the chromosomes decondense and the nuclear membrane reforms is:
A. prophase. B. metaphase. C. anaphase. D. telophase. E. interphase.
Describing the protein causing red blood cells to be sickle-shaped is referring to the protein's:
A. phenotypic function B. cellular function C. molecular function
Viruses can control host population
a. by reducing their numbers. b. by modifying their growth rate. c. by increasing their capacity to expand. d. by making them more attractable to predators. e. by attaching to the host membrane, causing the host cell to sink.
How would amino acids and calcium ions from the bloodstream move across a cell membrane?
A) diffusion B) osmosis C) facilitated diffusion D) active transport