Chapter 5: Cell Growth and Division

Before a cell can proceed to mitosis from the gap 2 stage of the cell cycle it must

• undergo cytokinesis

• double in size

• complete a full cell cycle

• pass a critical checkpoint

Which of the following occurs in telophase?

• chromosomes line up

• chromosomes condense

• chromosomes move to opposite poles

• chromosomes relax

Which organism is capable of reproduction through asexual mitosis?

• oak tree

• starfish

• bacterium

• horse

What is cancer caused by?

• metabolic poisoning

• mutation

• immune-system damage

• cell-membrane damage

A hormone present in the blood can stimulate the growth of certain cells. The hormone is acting as a(n)

• external factor

• oncogene

• daughter cell

• carcinogen

Kinases and cyclins are internal factors that

• cause cancer cells to break away

• cause apoptosis

• prevent mitosis

• control the cell cycle

Which statement is true of the chromosome shown in Figure 5.2?

• its centromere has been lost during the copying of DNA

• its left and right halves carry identical genetic information

• its sister chromatids have spindle fibers attached

• its telomeres have been shortened due to repeated cell division

A cell has 12 chromosomes. How many chromosomes will each daughter cell have?

• 12

• 6

• 4

• 24

Multicellular organisms use mitosis for growth, development, and

• repair

• reproduction

• apoptosis

• interphase

Which phrase best describes fragmentation?

• parent organisms sprouts projection that becomes a new organism

• parent organism sends off runners that grow into a new organism

• parent organism produces eggs and sperm, which form a new organism

• parent organism splits into pieces, each of which forms a new organism