In nature, genes with the potential to produce serious defects are acted against and kept at a low

frequency by:
a. neutral variations.
b. stabilizing selection.
c. disruptive selection.
d. frequency dependent selection.
e. natural selection.


E

Biology & Microbiology

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The helical shape of the DNA contains major and minor grooves, which assist in the regulating of gene expression

Indicate whether the statement is true or false

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An eccentric fragment is one result of crossing-over between a normal chromosome and a chromosome that has undergone what kind of mutation?

A) parametric inversion B) duplication C) reciprocal translocation D) eccentric inversion

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The diffusion of water across a plasma membrane is referred to as

A. facilitated diffusion. B. active transport. C. bulk flow. D. osmosis. E. countercurrent flow.

Biology & Microbiology

Enzymes increase the rate of a reaction by increasing molecular motion, thereby providing kinetic energy to drive the reaction.

Answer the following statement true (T) or false (F)

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