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LAMC
BIOLOGY

Bio3: Quiz 3 Study Guide - Fall 2006

Topics:

Note: The quiz will contain questions that are similar, but not identical to, the study questions below and the lab review sheet questions.
The quiz will cover lab topics for Ex. 6 (Cellular Respiration), 7 (Photosynthesis) and the Mitosis & Meiosis lab pack.
You should be able to:
- list the reactants and products of fermentation and cellular respiration.
- list the reactants and products for the light and dark reactions of photosynthesis.
- identify the purpose of the various procedures in the experiments you carried out in lab.
- interpret hypothetical results for an experiment to determine if the hypothesis was supported or refuted.
- propose a biologically accurate hypothesis based on background information about fermentation, respiration and photosynthesis reactions.
- draw the different stages of mitosis and meiosis
- calculate the number of chromosomes in diploid and haploid daughter cells
- calculate the possible number of unique daughter cells that are formed during meiosis

Study Questions:

1. In a cellular respiration experiment similar to the one you performed in lab, you add lima bean extract (source of mitochondria) and a substrate to a test tube to determine how amount of substrate affects reaction rate.  Using the information in the table, answer the following questions.

a. Why was it necessary to add the lima bean extract to observe cellular respiration?
b. In which tube would you expect to see the greatest rate of reaction? Why?
c. Based on the information in the table, what is not standardized in this experiment?
d. What is the independent variable?
e. Which test tube is the control? Why?

2. Where in the cell do the light and dark reactions of photosynthesis take place?

3. a) In the photosynthesis experiment you conducted in lab, list two standardized variables for part A.
b) What were the independent and dependent variables for part A?

4. In a photosynthesis experiment similar to the one you performed in lab, you decide to test whether the amount of CO₂ affects photosynthetic rate. 
a) Based on the photosynthetic equation, state a biologically reasonable hypothesis for this experiment.
b) Which of the materials in the lab experiment that you used provided the source of CO₂?

5. In a photosynthesis experiment similar to the one you performed in lab, you decide to test if leaf color affects photosynthetic rate.  You use all-green leaves, ½ green ½ white leaves, and all-white leaves from the same plant.  In which group would you expect to see the greatest rate of photosynthesis? Why?

Answers:

1a. The lima bean extract provides a source of mitochondria, which is where cellular respiration takes place.
1b. Tube 3, because it has the greatest amount of substrate.
1c. The total volume of solution in the tubes is not standardized.
1d. Amount of substrate.
1e. Tube 1 is the control because it doesn’t contain any substrate.

2. In the chloroplast

3. a) size and shape of the leaf disks, the plant species you used, the % concentration of sodium bicarbonate, the procedure for removing the air from the leaf disks, etc.
b) independent variable: amount of light; dependent variable: # of floating disks (amount of oxygen produced)

4. a) As the concentration of CO₂ increases, the rate of photosynthesis will increase.
b) sodium bicarbonate (NaHCO₃) solution

5. The all-green leaves should show the greatest rate of photosynthesis because they contain the greatest amount of chlorophyll.

©2003-2004 Dilek Sanver-Wang, MS
Los Angeles, CA USA.  All Rights Reserved.