Chap 4 Cell Cycle and Mitosis SB

During the cell cycle, G1, S, and G2 collectively make up the phase known as what?

Interphase

Indicate which of the following are functions of mitosis.

It allows development of an individual, composed of some 50 trillion cells, from a one-celled fertilized egg. It repairs damaged tissues. It allows growth of all tissues and organs after birth. It replaces the cells that die with new ones.

Indicate which of the following is NOT part of interphase.

M

The chromosomes are seen as fully aligned on the cell equator during which phase of mitosis?

Metaphase

A cell replicates its nucleus and then forms two new daughter cells during which phase of the cell cycle?

Mitotic phase (M)

Put the steps of mitosis in the correct order.

Prophase Metaphase Anaphase Telophase

Name the correct order of the phases of mitosis from beginning to end.

Prophase, metaphase, anaphase, telophase

The process by which a cell makes a copy of its DNA, creating two new strands is referred to as which of the following?

Replication

Name the period of synthesis during which a cell makes a duplicate copy of its centrioles and all of its nuclear DNA.

S phase

Which of the following are true regarding the cell cycle?

Some cells like stomach and skin cells divide rapidly. Some cells leave the cell cycle for a "rest" and cease to divide for days, years, or the rest of one's life.

The new nuclear envelopes forms, new nucleoli appear, and the mitotic spindle vanishes during which phase of mitosis?

Telophase

What occurs during the G2 phase of the cell cycle?

The cell synthesizes enzymes that control cell division and also checks and repairs the newly copied DNA.

What occurs during the G1 phase of the cell cycle?

The cell synthesizes proteins, grows, and accumulates the materials needed to replicate its DNA in the next phase.

As cytokinesis progresses, an indentation between the future cells forms. This is known as what?

cleavage furrow

Cytokinesis is the division of the cell's ____ to form two cells.

cytoplasm

When a cell replicates its nucleus and then pinches in two to form two new daughter cells it is said to be in the M phase, also called the ____ phase, of the cell cycle.

miotic

The form of cell division in which a cell divides once and produces two genetically identical daughter cells is known as ____.

mitosis

During metaphase, the spindle fibers form a lemon-shaped array called the ____ splindle.

mitotic

During the mitotic phase called ____, chromosomes condense, the nuclear envelope disappears, spindle fibers grow, and centrioles migrate to the poles of cell.

prophase

The process by which a cell makes a copy of its DNA so it can give complete and identical copies of all of its genes to each daughter cell is DNA ____.

replication

Describe the events that occur during the synthesis (S) phase of the cell cycle.

A cell makes a duplicate copy of its centrioles and all of its nuclear DNA.

What is a cleavage furrow?

An indentation between the future cells that forms as cytokinesis progresses

Daughter chromosomes migrate to opposite poles of the cell during which phase of mitosis?

Anaphase

Which of the following occurs during anaphase?

Daughter chromosomes migrate to opposite ends of the cell.

Indicate which of the following events occur during prophase of mitosis. Select all that apply.

Centrioles are pushed apart. Spindle fibers grow from the centrioles. Chromosomes condense. Nuclear envelope disappears.

Select that statements that describe telophase.

Chromatids cluster on each side of the cell. A nuclear envelope reappears.

The division of the cytoplasm to form two cells is called ____.

Cytokinesis

Which phase is the period of time during which cells are in a non-dividing phase outside of the cell cycle? The length of this period is variable and for some cells it may last days, years, or the rest of one's life.

G0

Which phase is an interval between cell division and DNA replication? During this time, a cell synthesizes proteins, grows, and accumulates the materials needed to replicate its DNA in the next phase.

G1

Place the phases of the cell cycle in the correct order starting with G1.

G1, S, G2, M

Which phase is a short period of time of growth and preparation for mitosis? During that time, the cell produces enzymes that control cell division, and also checks and repairs the newly copied DNA.

G2

Indicate which of the following statements are true about the G0 phase of the cell cycle.

The duration of this phase is variable (for some cells it may last days, years, or the rest of one's life). During this phase cells leave the cell cycle for a "rest" and cease to divide. An inability to stop cycling and enter G0 is characteristic of cancer cells.

True or false: The length of the cell cycle varies from one cell type to another.

The statement is true. The length of the cycle varies. Stomach and skin cells divide rapidly, bone and cartilage cells slowly, and skeletal muscle cells and nerve cells not at all. Some cells leave the cell cycle for a "rest" and cease to divide for days, years, or the rest of one's life.