11. Cell Division

Interphase

11. Cell Division

Interphase

Guided videos.

Cells spend the majority of their time in which one of the following phases of the cell cycle?

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Multiple Choice

The first phase in the cell cycle (G1) corresponds to ___________.

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Multiple Choice

Which pair includes a phase of the cell cycle and a cellular process that occurs during that phase?

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Multiple Choice

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

a) Spindle.

b) Centromere.

c) Centrosome.

d) Kinetochore.

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Multiple Choice

What is the role of the spindle fibers during mitosis?

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Multiple Choice

A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled __________.

A cell biologist carefully measured the quantity of DNA in grasshopper cells growing in cell culture. Cells examined during the G₂ phase of the cell cycle contained 200 units of DNA. What would be the amount of DNA at G₁ of the cell cycle in one of the grasshopper daughter cells?

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Multiple Choice

During interphase, the genetic material of a typical eukaryotic cell is __________.

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Multiple Choice

DNA replication occurs in __________.

If a human somatic cell is just about to divide, it has __________ chromatids.

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Multiple Choice

How many maternal chromosomes are present in a somatic human cell when it is not engaged in cell division?

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Multiple Choice

Chromatids are __________.

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Multiple Choice

During what phase in the cell cycle would you find the most DNA per cell?

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Textbook Question

After S phase, what makes up a single chromosome? a. two daughter chromosomes b. a double-stranded DNA molecule c. two single-stranded DNA molecules d. two sister chromatids

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Textbook Question

It is difficult to observe individual chromosomes during interphase because a. the DNA has not been replicated yet. b. they are in the form of long, thin strands. c. they leave the nucleus and are dispersed to other parts of the cell. d. homologous chromosomes do not pair up until division starts.

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Textbook Question

Which of the following occurs during S phase? (A) condensation of the chromosomes (B) replication of the DNA (C) separation of sister chromatids (D) spindle formation

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Textbook Question

Cell A has half as much DNA as cells B, C, and D in a mitotically active tissue. Cell A is most likely in a. G1. b. G2. c. prophase. d. metaphase.

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Textbook Question

A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in a cell doubled a. between prophase and anaphase of mitosis. b. between the G1 and G2 phases of the cell cycle. c. during the M phase of the cell cycle. d. between prophase I and prophase II of meiosis.

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Textbook Question

A particular cell type spends 4 hours in G1 phase, 2 hours in S phase, 2 hours in G2 phase, and 30 minutes in M phase. If a pulse–chase experiment were performed with radioactive thymidine on an asynchronous culture of such cells, what percentage of mitotic cells would be radiolabeled 9 hours after the pulse? a. 0 percent b. 50 percent c. 75 percent d. 100 percent

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Textbook Question

If a cell at G1 contains four picograms of DNA, how many picograms of DNA will it contain at the end of the S phase of the cell cycle? a. 0; b. 2; c. 4; d. 8

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11. Cell Division

Interphase

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