Chapter 9 - Mitosis and Cell Cycle pre-lecture

Eukaryotic chromosomes are made up of only DNA. True or False?

False

What is the most important difference between asexual reproduction and sexual reproduction?

Asexually produced cells are genetically identical. Sexually produced cells are genetically unique.

True or false. Mitosis takes place during M phase of the cell cycle, which is longer than interphase.

False, it does occur during the M phase, however, the M phase is shorter than interphase

Cells spend most of their time in what phase?

Interphase

A certain species of animal has six pairs of chromosomes. How many DNA molecules are present in the nuclei of these animals during G2 phase? a. 6 b. 48 c. 24 d. 12

c. 24

During ___ the cell grows and replicates both its organelles and its chromosomes. a. S b. mitosis c. interphase d. G1 e. cytokinesis

c. interphase

The chromosomes and genes are actually replicated during a. metaphase. b. anaphase. c. interphase. d. prophase. e. telophase.

c. interphase.

Which of the following is NOT correct? a. All somatic cells are produced by mitosis. b. Mitosis produces genetically identical cells. c. Metaphase occurs before anaphase. d. Cytokinesis is a part of mitosis.

d. Cytokinesis is a part of mitosis.

A bacterial cell splits into two new cells by a process called a. duplication. b. forming a cell furrow. c. mitosis. d. prokaryotic fission. e. forming a cell plate.

d. prokaryotic fission.

True or false. Normal human cells can go on dividing indefinitely.

true

Most prokaryotes reproduce via a form of asexual reproduction called prokaryotic fission. True or False?

True

The uncoiled DNA in a eukaryotic cell is much longer than the cell itself. True or False?

True

In a typical human body cell, how many chromosomes are there? a. 46 b. 1 c. 23 d. 2

a. 46

Replication of the bacterial ___ is required before the bacterial cell can be duplicated. a. chromosome b. mitochondria c. nucleus d. gamete

a. chromosome

During ___ both the contents of the nucleus and the cytoplasm are divided. a. the mitotic phase b. mitosis c. G2 d. S e. G1

a. the mitotic phase

Which of the following checkpoints does not occur late in G1? a. A check that the cell is large enough for division b. A check that chromosome replication has been successfully completed c. A check that nutrients are sufficient d. A check that growth factors are present

b. A check that chromosome replication has been successfully completed