Question

comprehensive cell biology review assignment
part a: multiple choice (1 pt each)

1. which of the following is not a characteristic of all living things?

a. ability to reproduce
b. made of one or more cells
c. can move
d. responds to stimuli

1. the cell theory states all of the following except:

a. all living things are made of cells
b. cells are the basic units of structure and function in living things
c. all cells have a nucleus
d. all cells come from pre - existing cells

1. which microscope is best for viewing the surface of a specimen in 3d?

a. light microscope
b. transmission electron microscope
c. scanning electron microscope
d. dissecting microscope

1. which structure controls the movement of substances in and out of the cell?

a. cytoplasm
b. mitochondria
c. cell membrane
d. lysosome

1. which organelle is directly involved in modifying and packaging proteins?

a. ribosome
b. rough er
c. golgi apparatus
d. nucleolus

1. which of the following structures is found in plant cells only?

a. mitochondria
b. cell wall
c. ribosomes
d. nucleus

Explanation:

1. Question 1:

• All living things can reproduce (A), are made of cells (B), and respond to stimuli (D). However, not all living things can move (e.g., plants are mostly stationary).

1. Question 2:

• The cell theory states that all living things are made of cells (A), cells are the basic units (B), and cells come from pre - existing cells (D). But not all cells have a nucleus (prokaryotic cells lack a true nucleus).

1. Question 3:

• A scanning electron microscope (C) is used to view the 3D surface of a specimen. A light microscope (A) is for general viewing of thin specimens, a transmission electron microscope (B) is for internal structures of thin specimens, and a dissecting microscope (D) is for larger, non - thin specimens but not typically for 3D surface in the same detail as SEM.

1. Question 4:

• The cell membrane (C) controls the movement of substances in and out of the cell. Cytoplasm (A) is the jelly - like substance inside the cell, mitochondria (B) are for energy production, and lysosomes (D) are for digestion.

1. Question 5:

• The Golgi apparatus (C) modifies and packages proteins. Ribosomes (A) make proteins, rough ER (B) is involved in protein synthesis and initial folding, and nucleolus (D) is involved in ribosome synthesis.

1. Question 6:

• Plant cells have a cell wall (B), while animal cells do not. Mitochondria (A), ribosomes (C), and nucleus (D) are found in both plant and animal cells.

Answer:

1. C. Can move
2. C. All cells have a nucleus
3. C. Scanning electron microscope
4. C. Cell membrane
5. C. Golgi apparatus
6. B. Cell wall