What is the role of chlorophyll?
To produce sugar
To trap heat energy
To trap light energy
Which useful energy conversion is carried out by chlorophyll?
Heat energy to light energy
Chemical energy to heat energy
Light energy to chemical energy
What are the products of the light reactions?
Hydrogen and sugar
Oxygen and hydrogen
Sugar and oxygen
In photosynthesis, what is ATP required for?
Carbon fixation
Splitting water
Trapping light energy
In which cell organelles does carbon fixation occur?
Chloroplasts
Mitochondria
Vacuoles
Which word equation correctly describes the process of photosynthesis?
\[\text{carbon\,dioxide} + \text{oxygen} \to \text{sugar} + \text{water}\]
\[\text{carbon\,dioxide} + \text{water} \to \text{sugar} + \text{oxygen}\]
\[\text{sugar} + \text{oxygen} \to \text{carbon\,dioxide} + \text{water}\]
Which of the following are uses for the sugar produced by photosynthesis?
Making starch and cellulose
Making glycogen and starch
Making cellulose and glycogen
Which of the following are two major limiting factors of photosynthesis?
Carbon dioxide concentration and temperature
Temperature and oxygen concentration
Oxygen concentration and carbon dioxide concentration
Why can photosynthesis not occur at very high temperatures?
Because carbon dioxide concentration is lower
Because enzyme activity is lower
Because light intensity is lower
Which limiting factor of photosynthesis is likely to have the greatest effect on plants growing in an open field during a hot summer day?
Carbon dioxide concentration
Light intensity
Temperature