Which, If Any, of the Following Statements Is False

question 25

Multiple Choice

Which, if any, of the following statements is false?

• A) p53 acts as a brake on the cell cycle.
• B) p53 and RB1 are mutually antagonistic.
• C) p53 is normally inhibited by being bound to the MDM2 protein, but when phosphorylated, it changes conformation and is released from MDM2.
• D) At high concentrations p53 stimulates the transcription of various genes that inhibit apoptosis.

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Definitions:

Sister Chromatids

Identical copies of a single chromosome that are connected by a centromere and separate during cell division.

Zygote

The initial cell formed when a new organism is produced by sexual reproduction, resulting from the fusion of sperm and egg cells.

Chromosome Number

The total count of chromosomes present in the nucleus of a cell, specific to each species.

Diploid

An organism or cell having two complete sets of chromosomes, typically one set from each parent.