Photosynthesis Review

Topics: Photosynthesis, Calvin cycle, Adenosine triphosphate Pages: 4 (1205 words) Published: November 9, 2014
HW Review for Photosynthesis exam:
Due Monday March 28
Reminder your lab write up will be a next week. If your lab is this Friday you also will get a week to complete your full lab write-up.

Sample questions: 1. twenty-five plants were placed in each of four closed containers and then exposed to light conditions shown in the data table below. All other environmental conditions were held constant for a period of 2 days. At the beginning of the investigation, the quantity of CO2 present in each closed container was 250 cubic centimeter. The data table shows the amount of CO2 remaining in each container at the end of 2 days. Data table

Color of light
CO2 (cm3)

What can you hypothesize from the information above?

I. water +chlorophyll + light oxygen + hydrogen

II. CO2 +Hydrogen + ATPX+H20

2. The molecule represented by letter X is most likely?
a) fatty acid b) DNA c) PGAL d) an amino acid

3. Which process is represented by equation I?
a) photolysis b) carbon fixation c) synthesis d) the dark reaction

Photosynthesis and plant structure

Photosynthesis is the process of converting light energy to chemical energy and storing it in the carbon-hydrogen bonds of glucose. This process occurs in plants and some algae. Plants need only light energy, CO2, and H2O to make sugar. The process of photosynthesis takes place in the chloroplasts, specifically using chlorophyll. Biologists generally agree that the light process of photosynthesis can be divided into two major reactions. These are often referred to as the light and dark reactions. During the light reactions or photochemical reactions molecules of H20 are split producing atoms and a gas (oxygen). During this reaction, extra energy is stored in molecules of PGAL.

4. By which process is this extra energy stored in PGAL? (hint it gains something) Dark...
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