Question 1

The actual process of cell division in prokaryotic cells is called

Accepted Answer

A) meiosis. 
B) mitosis. 
C) binary fission. 
D) cytokinesis. 
A) meiosis. 
B) mitosis. 
C) binary fission. 
D) cytokinesis.

Question 2

In humans the diploid number of chromosomes is 46.The haploid number is 23.Prior to mitosis in the cell cycle,the cell is in the G2 phase.Which of the statements is true?

Accepted Answer

A) The homologous chromosomes are lined up on the equator. 
B) The homologous chromosomes have all been copied through DNA replication and are now sister chromatids. 
C) The homologous chromosomes have been pulled to their respective poles by the spindle apparatus. 
D) The homologous chromosomes have not been replicated yet. 
E) The homologous chromosomes are now in the haploid or n condition. 
A) The homologous chromosomes are lined up on the equator. 
B) The homologous chromosomes have all been copied through DNA replication and are now sister chromatids. 
C) The homologous chromosomes have been pulled to their respective poles by the spindle apparatus. 
D) The homologous chromosomes have not been replicated yet. 
E) The homologous chromosomes are now in the haploid or n condition.

Question 3

Following S phase,a human cell would have how many pairs of sister chromatids and individual DNA molecules?

Accepted Answer

A) 23 pairs of sister chromatids and 46 individual DNA molecules 
B) 23 pairs of sister chromatids and 92 individual DNA molecules 
C) 46 pairs of sister chromatids and 46 individual DNA molecules 
D) 46 pairs of sister chromatids and 92 individual DNA molecules 
E) 46 pairs of sister chromatids and 184 individual DNA molecules 
A) 23 pairs of sister chromatids and 46 individual DNA molecules 
B) 23 pairs of sister chromatids and 92 individual DNA molecules 
C) 46 pairs of sister chromatids and 46 individual DNA molecules 
D) 46 pairs of sister chromatids and 92 individual DNA molecules 
E) 46 pairs of sister chromatids and 184 individual DNA molecules

Question 4

The framework of microtubules that appears in cell division which eventually moves the chromatids apart is called the

Accepted Answer

A) aster. 
B) cell plate. 
C) centriole. 
D) spindle apparatus. 
E) centromerE. 
A) aster. 
B) cell plate. 
C) centriole. 
D) spindle apparatus. 
E) centromerE.

Question 5

The last stage of mitosis is characterized by the disassembly of spindle apparatus,the reestablishment of the nuclear membrane,and the decondensation of the chromosomes into invisible threads.This stage is known as _________.

Accepted Answer

A) interphase 
B) telophase 
C) anaphase 
D) metaphase 
A) interphase 
B) telophase 
C) anaphase 
D) metaphase

Question 6

You have been asked to provide genetic counseling to a family who has a very high incidence of various types of cancer.After some discussion,you tell them that you will do some genetic testing to determine if they carry any mutations that predispose them to cancer.Mutations in which of following proteins are most commonly associated with cancers?

Accepted Answer

A) Ras and p53 
B) Ras and Scr 
C) Scr and Rb 
D) Rb and p53 
A) Ras and p53 
B) Ras and Scr 
C) Scr and Rb 
D) Rb and p53

Question 7

Which of the following is not a checkpoint for cell cycle control in a eukaryotic cell?

Accepted Answer

A) G1/S 
B) G2/M 
C) spindle 
D) MFP 
A) G1/S 
B) G2/M 
C) spindle 
D) MFP

Question 8

Some of the portions of the chromatin are permanently condensed so that their DNA is never expressed.All of these portions stain very intensely and are given a common name of

Accepted Answer

A) DNA dark bands. 
B) euchromatin. 
C) heterochromatin. 
D) genome. 
E) haploid DNA. 
A) DNA dark bands. 
B) euchromatin. 
C) heterochromatin. 
D) genome. 
E) haploid DNA.

Question 9

The number of chromosomes characteristic of eukaryotes,in general,

Accepted Answer

A) can usually be determined without the use of a microscope. 
B) can usually be predicted from the size of the organism. 
C) change as the organisms grow and age. 
D) vary considerably from 2 to over 1000 in different species. 
E) vary depending on the type of the cell in the same organism. 
A) can usually be determined without the use of a microscope. 
B) can usually be predicted from the size of the organism. 
C) change as the organisms grow and age. 
D) vary considerably from 2 to over 1000 in different species. 
E) vary depending on the type of the cell in the same organism.

Question 10

You are conducting a genetic screen using Caenorhabditis elegans embryos to isolate mutations affecting anaphase A. Therefore, you need to look for embryos in which

Accepted Answer

A)  the centromeres do not move toward the poles. 
B)  the poles do not move apart. 
C)  the spindle apparatus does not disassemble. 
D)  sister chromatids fail to separate. 
A)  the centromeres do not move toward the poles. 
B)  the poles do not move apart. 
C)  the spindle apparatus does not disassemble. 
D)  sister chromatids fail to separate.

Question 11

The two copies of each chromosome in body cells are called

Accepted Answer

A) chromatids. 
B) homologous chromosomes. 
C) sister chromosomes. 
D) daughter chromosomes. 
E) genes. 
A) chromatids. 
B) homologous chromosomes. 
C) sister chromosomes. 
D) daughter chromosomes. 
E) genes.

Exam 10: How Cells Divide

The actual process of cell division in prokaryotic cells is called

In humans the diploid number of chromosomes is 46.The haploid number is 23.Prior to mitosis in the cell cycle,the cell is in the G2 phase.Which of the statements is true?

Following S phase,a human cell would have how many pairs of sister chromatids and individual DNA molecules?

The framework of microtubules that appears in cell division which eventually moves the chromatids apart is called the

The last stage of mitosis is characterized by the disassembly of spindle apparatus,the reestablishment of the nuclear membrane,and the decondensation of the chromosomes into invisible threads.This stage is known as _________.

Which of the following is not a checkpoint for cell cycle control in a eukaryotic cell?

Some of the portions of the chromatin are permanently condensed so that their DNA is never expressed.All of these portions stain very intensely and are given a common name of

The number of chromosomes characteristic of eukaryotes,in general,

You are conducting a genetic screen using Caenorhabditis elegans embryos to isolate mutations affecting anaphase A. Therefore, you need to look for embryos in which

The two copies of each chromosome in body cells are called

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In humans the diploid number of chromosomes is 46.The haploid number is 23.Prior to mitosis in the cell cycle,the cell is in the G₂ phase.Which of the statements is true?