biology exam 2 part 4

DNA synthesis

A cell is inhibited during the S phase of its cycle. It will not reproduce due to lack of

D

All of the following occur during the latter stages of mitotic prophase EXCEPT A the coiling of chromosomes B the division of centromeres C the formation of spindles D the synthesis of DNA

C

Apoptosis ___________ A is a process that repairs damaged DNA B occurs as telomeres increase in length C can be used to remove damaged or malfunctioning cells D increases the number of somatic cells

telophase/cytokinesis

Ben was looking at onion root tip cells under the microscope in Biology class. He saw one cell that had two nuclei within it. What stage of the cell cycle was this cell in?

D

The G2 checkpoint prevents the cell cycle from continuing until ______. A DNA is completely replicated B damage to DNA can be repaired C replicated DNA is separated D DNA is completely replicated AND damage to DNA can be repaired

B

Cytokinesis usually, but not always, follows mitosis. If a cell undergoes mitosis and not cytokinesis, this would result in A a cell with a single large nucleus B a cell with two or more nuclei C death of the cell line D cells with abnormally small nuclei

D

How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle? A the daughter cells have half of the amount of cytoplasm and half the amount of DNA B the daughter cells have half the number of chromosomes and half the amount of DNA C the daughter cells have the same number of chromosomes and half the amount of DNA D the daughter cells have the same number of chromosomes and the same amount of DNA

20

If there are twenty centromeres in a cell, how many chromosomes are there?

prophase

The drug chloral hydrate prevents elongation of microtubules by preventing the addition of new subunits to the growing end. During which stage of mitosis would chloral hydrate be most harmful?

anaphase

The figure below shows a cell in the mitotic stage of

interpahse

The figure below shows a cell in the mitotic stage of __________.

metaphase

The figure below shows a cell in the mitotic stage of __________.

centromere

The structure labeled "c" in the following figure is called the _________

C

Which of the following pair is correctly matched? A G1 phase - DNA replication B G2 phase - preparation for meiosis C S phase - DNA replication D M phase - cell growth

A

Which of the following represents the phases of mitosis in their proper sequence? A prophase, metaphase, anaphase, telophase B anaphase, interphase, prophase, metaphase, telophase C metaphase, interphase, cytokinesis, anaphase, telophase D prophase, metaphase, anaphase, telophase, cytokinesis