B13: Science 10 Biology Unit Review Questions (Chapter 7-9)
Answer as many questions as you can before looking at your books. Then check your
answers against the answer key AFTER you have done the work
yourself.
Chapter 7:
1. Using the following picture of Francesco Redi’s experiment, identify the
controlled variable(s), the manipulated variable(s), and the responding
variable(s). Use p. 499 of your textbook for help.
2. Explain the difference between abiogenesis and biogenesis. List the
scientists who were involved with developing the two theories and explain
what they did.
3. List the three points of cell theory and discuss what scientists helped to
develop it.
4. A compound light microscope has a medium objective lens with a 10x magnification and an ocular lens
with a 10x magnification. What is the overall magnification of the microscope at that power? Show your
work!
5. Why do scientists stain specimens to view under the microscope?
6. Match the following microscope with its description below.
a. Compound Light Microscope ____
b. Transmission Electron Microscope (TEM) ____
c. Scanning Electron Microscope (SEM) ____
i. This microscope uses a sweeping beam of electrons to produce a three dimensional object and can
magnify from 10 000X to 300 000x.
ii. This microscope uses a fixed beam of electrons to produce two dimensional images and can
magnify between 10 000x and 100 000x.
iii. Objects are illuminated by visible light. This microscope can be used to view living cells.
7. Label the following diagram.
8. List the parts of the plant and animal cell that are different, and for the plant cell parts describe why they
are only needed in plant cells and not animal cells.
9. Describe the pathway for the production of a protein in a cell (from the productions of ribosomes to when
the proteins are secreted from the cell)
Chapter 8:
10. Label the following fluid mosaic model of the cell membrane with the words provided.
carbohydrate group hydrophilic heads hydrophobic tails
channel protein carrier protein phospholipid bilayer
cholesterol
11. Match the following words with their definitions
a. semi-permeable ____ i. allows all materials to cross
b. impermeable ____ ii. random motion of particles
c. permeable ____ iii. allows some materials to cross
d. hydrophobic ____ iv. “water-fearing”
e. hydrophilic ____ v. movement across a membrane
f. Brownian motion ____ vi. does not allow materials to cross
g. selective transport ____ vii. “water-loving”
12. Match the following pictures with their
descriptors. For pictures where particles
would move, indicate WITH ARROWS, which
particles will move and in what direction.
When a cell is involved, indicate whether it
will swell, shrink, or stay the same size.
a. molecules in equilibrium
b. a cell in an isotonic environment
c. a cell in a hypotonic solution
d. concentration gradient
e. a cell in hypertonic solution
13. Explain the difference between active and passive transport. Use the term concentration gradient.
14. Put boxes around the following methods that are active transport. Underline the methods that are
passive transport.
carrier protein against the concentration gradient pinocytosis
diffusion phagocytosis receptor-mediated endocytosis
osmosis carrier protein with the concentration gradient
channel protein against the concentration gradient facilitated diffusion
exocytosis channel protein with the concentration gradient
15. Explain hypertonic and hypotonic using the terms solute, water and concentration. Remember when
using these terms, you are always comparing two solutions. A solution cannot be hypertonic without
something to compare it against.