Name __________________________________ Date _________ Class _____________


Reading Guide

Section 8–1 Energy and Life (pp. 226-228)


Chemical Energy and ATP

1.      What is one of the most important chemical compounds that cells use to store energy?


2.      How is ATP different from ADP?



3.       Label each part of the ATP molecule illustrated below.

Phosphate groups



4.      How can ATP easily store and release energy?



5.      Look at the visual analogy on page. 227. Explain the difference between the beams of light produces by the flashlight “powered” by ADP and the flashlight “powered” by ATP.





6.      Name three ways in which cells use the energy provided by ATP?

a. A






7.      Why is it efficient for cells to keep only a small supply of ATP on hand?




8.       Circle the letter of where cells get the energy to regenerate ATP.

a. ADP

b. phosphates

c. foods like glucose

d. organelles


Heterotrophs and Autotrophs


9.      Complete the table below.

Method of obtaining food









10.  What occurs during the process of photosynthesis?



Section 8–2 Photosynthesis: An Overview (pp. 230-233)


Chlorophyll and Chloroplasts

11.   Light absorbing molecules are called _________________________________.


12.   Circle the letters of the regions of the visible spectrum in which chlorophyll absorbs light very well.

a. blue-violet region

b. green region

c. red region

d. yellow region. This


13.   Chloroplasts contain saclike photosynthetic membrane called _____________.


14.  What is a granum (plural:grana)?



15.  The fluid portion outside the thylakoid membranes in the chloroplasts is called the _____________________________________________.









16.  Label the following diagram:




High-Energy Electrons

17.  Look at the visual analogy on page. 232. How is NADP+ like an oven mitt?



18.  How does NADP+ become NADPH?



An Overview of Photosynthesis


19.  Write the overall equation for photosynthesis using chemical formulas.




20.  Write the overall equation for photosynthesis using words.



21.  What are the two stages of photosynthesis called?


a. _____________________________________________________________________

22.  _____

b. _____________________________________________________________________


23.  Circle the letter of each sentence that is true about the light-dependent reactions.

a. They convert ADP into ATP.

b. They produce oxygen gas.

c. They convert oxygen into carbon dioxide.

d. They convert NADP+ into NADPH.


24.  Where do the light-dependent reactions take place? _______________________



25.  What three molecules does the light-independent reaction use to produce high-energy sugars?







26.  Where do the light-independent reactions take place? _____________________


27.  Complete the illustration of the overview of photosynthesis by writing the products and the reactants of the process, as well as the energy source that excites the electrons.




Section 8–3 The Process of Photosynthesis (pp.235-241)

28.  What is an electron transport chain?



29.  What is the function of ATP synthase?



30.  The light-independent reactions are also called __________________________.