Name: 

Photosynthesis


 
True/False
Indicate whether the sentence or statement is true or false.
 

1. 

All organisms require energy to carry out life processes.
 

2. 

Animals that live exclusively on a diet of other animals are unable to use carbohydrates to fuel their life processes.
 

3. 

When light hits a plant, all of the wavelengths are absorbed and used to make sugar.
 

4. 

A series of linked chemical reactions in which the product of one chemical reaction serves as the reactant in the next reaction is called a biochemical pathway.
 

5. 

An autotroph is able to make its own organic molecules from inorganic materials and energy.
 

6. 

The major light-absorbing pigment in plants is chlorophyll.
 

7. 

Plant cells use light to make ATP and NADPH.
 

8. 

The “light reactions” of photosynthesis can occur only under light conditions, and the “dark reactions” occur only during the dark hours.
 

9. 

The final product of photosynthesis is not actually glucose.
 

10. 

C4 and CAM plants use less water to produce the same amount of carbohydrate as C3 plants.
 
 
Completion
Complete each sentence or statement.
 

11. 

Stacks of thylakoids, called ____________________, are found suspended in the stroma of chloroplasts.
 

 

12. 

A pigment that absorbs primarily red and blue photons of light for photosynthesis is called ____________________, while pigments that absorb other wavelengths and appear yellow and orange are called ____________________.
 

 

13. 

Organisms that harvest energy from either sunlight or chemicals in order to make food molecules are called ____________________.
 

 

14. 

The main pigment associated with the two photosystems is ____________________.
 

 

15. 

In the electron transport chain of photosynthesis, electrons travel from molecule to molecule as part of a(n) ____________________ atom.
 

 

16. 

The abundance of oxygen in Earth’s atmosphere is a result of ____________________.
 

 

17. 

Chemiosmosis results in the release of ____________________.
 

 

18. 

The third stage of photosynthesis, in which glucose is manufactured, is called the ____________________.
 

 

19. 

The scientist who determined the sequence of steps in the light-independent reactions was ____________________.
 

 

20. 

The ____________________ plants have an enzyme that is more efficient at fixing CO2 than is the enzyme that accomplishes this in ____________________.


 



 
Check Your Work     Reset Help