Biology TOPIC 1

Eukaryote

A cell that contains a nucleus and membrane-bound organelles

Organelle

A tiny cell structure that carries out a specific function within the cell

7. Bacterial cells are prokaryotic; in comparison to a typical eukaryotic cell they would a. be smaller. b. have a smaller nucleus. c. lack a plasma membrane. d. have fewer internal membranous compartments. e. have a greater variety of organelles.

A

8. The maximum size of a cell is limited by a. its need for enough surface area for exchange with its environment. b. the number of organelles that can be packed inside. c. the materials needed to build it. d. the amount of flexibility it needs to be able to move. e. the amount of food it needs to survive.

A

9. Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic? a. the presence or absence of a rigid cell wall b. whether or not the cell is partitioned by internal membranes c. the presence or absence of ribosomes d. whether or not the cell carries out cellular metabolism e. whether or not the cell contains DNA

A

4. According to the Cell Theory: a. cells arise spontaneously from nonliving substances. b. all living things are composed of cells. c. all cells have the same number and kind of organelles. d. cells are identical in shape and size. e. all cells are surrounded by a cell wall.

B

1. The Cell Theory includes all of the following, except: a. All the life processes occur in cells. b. All living things are composed of one or more cells. c. All cells are about the same size and contain organelles. d. Cells arise only by division of previously existing cells. e. The cell is the basic unit of organization of organisms.

C

10. It is advantageous for cells to be small because: a. A small cell size prevents a cell from weighing too much b. A small cell size occupies less space in nature where space is limited c. A small cell has a small volume relative to surface area, thereby increasing efficient transport d. A small cell has a small surface area relative to volume, thereby facilitating ion balance e. A small cell is better able to conserve energy than a larger cell

C

2. The size of typical eukaryotic cells is measured in a. km b. mm c. µm d. nm e. pm

C

3. Long, fine, threadlike organelles of motility that protrude from the surfaces of prokaryotic cells are a. actin filaments. b. basal bodies. c. flagella. d. hairs. e. microtubules.

C

Prokaryote

Cells without a true nucleus.

6. Which of the following structures would not be found in prokaryotic cells? a. Cell wall b. Ribosomes c. Nuclear area d. Nucleus e. Flagellum

D

5. A eukaryotic cell: a. is usually smaller than a prokaryotic cell. b. has its DNA concentrated in one area of the cell without a nuclear membrane. c. typically has a cell wall, in addition to a plasma membrane. d. is exemplified by bacteria. e. has a variety of membranous organelles.

E