Biology

Unit 5 Exam

As a Cell Becomes Larger, its

• Volume increases faster than its surface area• Surface area increases faster than its volume• Volume increases, but its surface area stays

the same• Surface area stays the same, but its volume

increases

All of the following are problems that growth causes EXCEPT

• DNA overload• Excess O2• Obtaining enough food• Expelling wastes

When during the cell cycle are chromosomes visible?

• Only during Interphase• Only when they are replicated• Only during M phase (mitosis)• Only during G1 phase

Which pair is correct?

• G1 phase, DNA replication• G2 phase, preparation for mitosis• S phase, cell division• M phase (mitosis), cell growth

When during the cell cycle is a cells DNA replicated?

• G1• G2• S• M

Which event occurs during Interphase?

• Cell growth• Centrioles appear• Spindle fibers appear• Centromeres divide

During which phase do the chromosomes line up along the

middle?

• Prophase• Telophase• Metaphase• anaphase

Which represents the right order of Mitosis?

• Prophase, metaphase, anaphase, telophase• Interphase, prophase, metaphase, anaphase,

telophase• Interphase, prophase, metaphase, teolphase• Prophase, metaphase, anaphase, telophase,

cytokinesis

What is the role of the spindle during Mitosis?

• Helps separate chromosomes• Breaks down nuclear envelope• Duplicates DNA• Divides cell in half

The two main stages of cell division

• Mitosis, interphase• Synthesis, cytokinesis• M phase, S phase• Mitosis, Cytokinesis

Which will stop cells from growing

• Contact with other cells• Growth factors• Cut in the skin• Cyclin taken from a cell in mitosis

Why would cells in a petri dish stop growing once they have covered the

bottom• Cells lack cyclin• The petri dish inhibits cell growth• Contact with other cells inhibits growth• Most cells in petri dishes lack p53

Cancer is a disorder in which some cells have lost their ability to control

their

• Size• Spindle fibers• Growth rate• Surface area

As a cell grows, it

• Places more demands on DNA• Uses food and O2 more quickly• Has more trouble moving materials across cell

membranes• All of the above

Compared with small cells, large cells have more trouble

• Dividing• Producing daughter cells• Moving materials in and out• Making copies of DNA

The process in which a cell divides into two daughter cells

• Cell division• Metaphase• Interphase• mitosis

Which of the following happens when a cell divides

• Cells volume increases• Becomes more difficult for food and materials

to get in• The cell has DNA overload• Each daughter cell receives its own copy of

the parent cells DNA

Which is a phase in the cell cycle

• G1• G2• M• All of the above

The cell cycle is

• Series of events that cells go through as they grow and divide

• Period of time between the birth and death of a cell

• Time from prophase to cytokinesis• Time it takes for one cell to undergo

cytokinesis

What is the point in the middle of a chromosome called?

• Centromere• Centriole• Sister chromatid• spindle

What is a tumor

• An accumulation of cyclin• A mass of cells• The rapidly dividing cells found at the site of a

wound• A defective p53 gene