Half a woman's somatic cells express her paternal X chromosome and half express her maternal X chromosome

Indicate whether the statement is true or false


FALSE
Explanation: X-inactivation is random, so the maternal and paternal copies of her X chromosomes will not be inactivated with equal frequency.

Biology & Microbiology

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In glycolysis, which of the following molecules is oxidized to form 1,3-bisphosphoglycerate?

A) 3-phosphoglycerate B) 2-phosphoglycerate C) glyceraldehyde-3-phosphate D) glucose E) glucose-6-phosphate

Biology & Microbiology

Urine via catheter is:

a. acceptable. b. not acceptable.

Biology & Microbiology

In early experiments to understand the control of the cell cycle, researchers fused HeLa cells that were at different

stages of the cell cycle. What did the results of these experiments suggest?

a. The concentrations of cyclin dependent kinases (Cdks) fluctuate throughout the cell cycle. b. The concentrations of cyclins fluctuate throughout the cell cycle. c. The cell cycle has three checkpoints through which the cell must pass in order to progress through to mitosis. d. Microtubules play an essential role in the progression of the cell cycle. e. Molecules in the cytoplasm control the progression of the cell cycle.

Biology & Microbiology

From which generation does the pollen grain develop?

a. from the female gametophyte b. from the female sporophyte c. from the male sporophyte d. from the male gametophyte

Biology & Microbiology