Photosynthesis Homework #1
__________________________________
Name
1.
What is the ultimate source of energy for all living things on Earth?
2.
During photosynthesis, the _____________________ from the sun is used to produce molecules of
_________________.
3.
What does ADP and ATP stand for? What is the role of this molecule inside a cell?
4.
How many phosphate groups are in ADP? How many phosphate groups are in ATP? What is
the significance of this third phosphate?
5.
Describe the three parts of the ADP / ATP molecule.
6.
List four cellular activities that would require the energy of ATP?
7.
What happens to make ATP become ADP? Why is this important for the life of the cell?
8.
How does ADP become ATP? Where does this energy come from?
9.
What is the difference in the way autotrophs and heterotrophs obtain energy? Give examples
of autotrophs and heterotrophs.
10. What is the equation for photosynthesis? How does the plant obtain each of these?
11. How does chlorophyll make a plant appear to be green?
12. What plant structures control the passage of water out of the plant and carbon dioxide into the
plant.
13. Why might the stomata be called “necessary evils”
__________14
Which one of the following is not required for photosynthesis? (1) water (2)
carbon dioxide (3) chlorophyll (4) oxygen (5) light energy.
__________15
Which of the following is a true statement about chlorophyll? (1) It absorbs mostly
green light. (2) It is responsible for the red and orange colors of leaves in the Fall.
(3) It absorbs red and blue light the best. (4) It is useful for photosynthesis, but
not absolutely necessary.
True or False?
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Photosynthesis is the process of trapping the sun’s energy in order to make
molecules of glucose.
___________17
Carbon dioxide is produced during photosynthesis.
___________18
ATP is very energy poor and ADP is very energy rich.
___________19
Heterotrophs depend on autotrophs, but autotrophs are not dependent on
heterotrophs.
___________20
All parts of the plant are capable of carrying out photosynthesis.
___________21
The primary photosynthetic part of a leaf are the spongy cells
Fill in the Blank:
_________________________22
Organisms that can make their own food.
_________________________23
Organisms that cannot make their own food.
_________________________24
Life on earth is dependent on photosynthesis for what two things?
_________________________25
Why do autotrophs depend on heterotrophs?
_________________________26
Water is required for photosynthesis. How does the plant acquire
this?
_________________________27
Carbon dioxide is required for photosynthesis. How does the plant
acquire this?
_________________________28
Any substance that absorbs light.
_________________________29
What is the name of the waxy layer found on the upper and lower
surface of a leaf?
_________________________30
Why is this waxy layer necessary?
_________________________31
What is the name of the cells in the leaf that are the primary
photosynthetic layer of the leaf?
What is the name of the middle portion of the leaf?
_________________________32
_________________________33
Pores on the underside of the leaf; they let carbon dioxide into the
leaf.
_________________________34
This carries water to the leaves from the roots.
_________________________35
This carries food out of the leaf to all other parts of the plant.