Section 6.1 – The Cell Cycle and Mitosis

Growth factors binding to cell receptors

Decrease in nutrient availability

Lack of oxygen

Absence of genetic material

128 cells (assuming one cell divides every 24 hours, doubling each day for 7 days: $$2^7 = 128$$ )

64 cells

256 cells

32 cells

The statement is incorrect; a cell is active during interphase, carrying out growth and DNA replication.

The statement is correct; a cell does not perform any activities during interphase.

The statement is partially correct; a cell only prepares for division during interphase.

The statement is incorrect; a cell undergoes mitosis during interphase.

Interphase

Prophase

Metaphase

Anaphase

Telophase

46

23

92

44

Interphase, Prophase, Metaphase, Anaphase

Prophase, Metaphase, Telophase, Cytokinesis

Interphase, Metaphase, Telophase, Cytokinesis

Prophase, Anaphase, Interphase, Metaphase

The centromere holds sister chromatids together and spindle fibers pull them apart during anaphase.

The centromere produces spindle fibers that help in cell division.

Spindle fibers attach to the cell membrane to separate the cell during anaphase.

Centromeres and spindle fibers are not involved in anaphase.

A chromosome during prophase consists of two sister chromatids joined at a centromere. The diagram should show two identical chromatids connected at a central point labeled as the centromere.

A chromosome during prophase consists of a single chromatid with no centromere. The diagram should show one chromatid without any connection point.

A chromosome during prophase consists of four chromatids joined at multiple centromeres. The diagram should show four chromatids connected at several points.

A chromosome during prophase consists of two non-identical chromatids joined at a telomere. The diagram should show two different chromatids connected at the end.