Which statement about the cell cycle is not true?
a. It consists of interphase, mitosis, and cytokinesis.
b. The cell's DNA replicates during G1.
c. A cell can remain in G1 for weeks or much longer.
d. DNA is not replicated during G2.
e. Cells enter the cell cycle as a result of internal or external signals.
Answer: b. The cell's DNA replicates during G1.
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Which of the following is a correct statement about pepsin?
A. It is manufactured by the pancreas. B. It helps stabilize fat-water emulsions. C. It splits maltose into monosaccharides. D. It is activated by the action of HCl on pepsinogen. E. It is denatured and rendered inactive in solutions with low pH.
Place the cellular processes responsible for animal development in the correct order: ____
a. induction ? differentiation ? determination b. induction ? determination ? differentiation c. determination ? induction ? differentiation d. determination ? differentiation ? induction e. differentiation ? determination ? induction
The term diplococcus refers to an irregular cluster of spherical bacterial cells.
Answer the following statement true (T) or false (F)
Botox used in cosmetic medicine blocks ____
a. ATP production b. ACh release c. the ability of motor neurons to have electrical impulses d. oxygen transport e. ACh receptors