The Cell Cycle Checkpoints Are Responsible for Checking That the Cell

question 77

Multiple Choice

The cell cycle checkpoints are responsible for checking that the cell is prepared to move on to the next stage in cell division.For example,the G₁-to-S checkpoint ensures that the cell has all the components and signals necessary to go on to S phase and that the appropriate signals are present.The G₂ checkpoint checks whether the

• A) chromosomes have been separated properly.
• B) DNA has been replicated properly.
• C) chromosomes have aligned properly.
• D) DNA has decondensed.
• E) cell organelles have duplicated properly.

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Definitions:

Formal-Operational Stage

A developmental stage proposed by Piaget, where individuals (around age 11 and older) gain the ability to think abstractly and logically.

Primitive Symbols

Basic or rudimentary forms of representation used to convey meanings or concepts without the use of words.

Tertiary Circular Reactions

In Piaget's stages of cognitive development, this phase (12-18 months) involves the purposeful adaptation of established schemes to new situations.

Secondary Circular Reactions

Repetitive actions in infants (4-8 months old) focused on external objects as a means to learn about their environment.