BI 101 Homework 3

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1. Using the illustration below, indicate which answer is in the direction of water
movement.
a. Water will move into the cell.
b. Water will move out of the cell.
c. There will be equal amounts of water moving in and out of the cell.
d. No movement.
2. The ribosomes are made in which cellular structure in the eukaryotic cell.
a. Rough endoplasmic reticulum
b. Ribosobium complex

2. c. Nucleolus
d. Smooth endoplasmic reticulum
e. Nucleus
3. Which of the following is not a major component of the plasma membrane?
a. phospholipids
b. glycoproteins
c. proteins
d. DNA
4. The rough endoplasmic reticulum is the area in a cell where Membrane proteins and
secretory proteins are synthesized.
5. The chloroplast functions in
a. lipid storage
b. protein synthesis
c. photosynthesis
d. DNA replication
6. Cell membranes are made of two phospholipid layers called a
a. bilayer
b. hydrophilic
c. polarity

3. d.semilayer
7. The nucleus is surrounded by a double layer membrane called the Nuclear Envelope.
a. nuclear matrix
b. nuclear envelope
c. cell membrane
d. nucleus wall
8. Not all substances can cross the cell membrane, for this reason, the cell membrane is
said to be
a. a barrier
b. selectively permeable
c. membrane bound
d. a cell wall
9. The cell organelle that processes and packages for export substances produced by the
cell is
a. mitochondria
b. ribosomes
c. Golgi apparatus
d. ER

4. 10. The cell organelle that digests molecules, old organelles, and foreign substances is
the
a. mitochondria
b. ER
c. Golgi apparatus
d. lysosomes
11. Organelle involved in the synthesis of steroids in glands and the breakdown of toxic
waste:
a. soft ER
b. smooth ER
c. rough ER
d. mitochondria
12.The part of the cell that regulates movement of substances into and out of the cell is
the
a. nucleus
b. cell membrane
c. Golgi apparatus
d. mitochondrion
13. Cells that have high energy requirement generally have many

5. a. nuclei
b. flagella
c. mitochondria
d. microfilaments
14. Suspended in the eukaryotic cell's cytosol are tiny
a. flagella
b. organelles
c. DNA
d. nucleolus
15. Organelle that transfers energy from organic compounds to ATP:
a. mitochondria
b. ribosomes
c. lysosomes
d. nucleus
16. Organelle that converts sunlight, carbon dioxide and water into sugars:
a. ribosomes
b. lysosomes
c. chloroplasts

6. d. vacuole
17. The fluid mosaic model presents the modern view of
a. a membrane's structure
b. chromosomes
c. aggregates of cells
d. the nucleus
18. Which is not a principle of the cell theory?
a. All matter consists of at least one cell.
b. Cells are the basic units of life.
c. All cells arise from preexisting cells.
d. All organisms are made of one or more cells.
19. A cell membrane is a thin layer of lipid and
a. monosaccharides
b. protein
c. chitin
d. water
20. Immerse a living cell in a isotonic solution, and water will tend to
a. diffuse into the cell.

7. b. diffuse out of the cell.
c. show no net movement.
d. move in by endocytosis.
21. Sodium ions cross a membrane at transport proteins that receive an energy boost.
This is a case of
a. passive transport.
b. active transport.
c. facilitated diffusion.
d. a and c.
22. Demonstrate your understanding of the three main types of cells we’ve learned about
this week by completing the following table:
Type Bacteria Plant Cell Animal Cell
Prokaryotic or eukaryotic?
Cell wall (Yes or No)

8. Cell membrane (Yes or No)
Nucleus (Yes or No)
Chromosomes (Yes or No)
Cilia and flagella (Yes or No)
Mitochondria (Yes or No)
Chloroplasts (Yes or No)
Performs cellular respiration (Yes or No)