Which of the Following Statements About Actin Is Not True

question 39

Multiple Choice

Which of the following statements about actin is not true?

• A)Actin is the most abundant cytoplasmic protein in many cell types.
• B)Actin forms microfilaments in many cell types.
• C)Actin plays an important role in endocytosis.
• D)Actin is present only as monomers in nonmuscle cells.
• E)Actin filaments are dynamic,they grow at one end and they lose subunits at the other end.

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Definitions:

Purifying Selection

A type of natural selection that removes deleterious alleles from a population, leading to a decrease in genetic variation for the traits affected.

Neutral Theory

A theory in molecular evolution that proposes most genetic variations are the result of genetic drift and not selective forces, and that at the molecular level, the majority of mutations are neutral.

Molecular Evolution

The process of evolution at the scale of DNA, RNA, and proteins, encompassing changes in molecular structure and sequence over time.

Genetic Drift

Random fluctuations in the frequencies of alleles within a population due to chance events.