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Holt Biology 27 Photosynthesis and Cellular Respiration

Photosynthesis and Cellular RespirationIn the space provided, write T if the statement is true or F if it is false.

______ 1. An autotroph is able to make organic compounds using the

energy of the sun.

______ 2. The process of converting light energy to chemical energy,

photosynthesis, can only happen in the dark.

______ 3. Three-carbon sugar molecules are formed during the Calvin

cycle.

______ 4. A substance that gives off light is called a pigment.

______ 5. Photosynthesis involves the pigment chlorophyll.

Circle the term that best completes each sentence.

6. Cells get energy to build molecules from ADP and (water,

sunlight, or air).

7. (Pigment, carotenoids, or glycolysis) breaks down glucose to

two pyruvates, two NADH molecules, and four ATP molecules.

8. When a chlorophyll molecule absorbs light, some of its electrons

become (smothered, excited, or ions).

9. A cell’s process of taking energy from food is called cellular

(respiration, perspiration, or fermentation).

10. Which is NOT a part of cellular respiration? (electron transport

chain, glycolysis, or reproduction)

11. Carbon dioxide fixation transfers (chlorophyll, pigment, or

carbon dioxide) to organic compounds.

Name Class Date

Chapter Test

Assessment

Copyright © by Holt, Rinehart and Winston. All rights reserved.

Holt Biology 28 Photosynthesis and Cellular Respiration

Name Class Date

Chapter Test continued

Questions 12 and 13 refer to the figures below. Circle the term that bestcompletes each sentence.

12. Graph A shows that the rate of photosynthesis (increases or

decreases) in response to more light, but only to a certain point.

13. Taken together, these graphs show that the rate of photosynthesis is

affected by changes in the (earth, environment, or electrons).

Using the word bank below, fill in each blank provided.

anaerobic Calvin cellular respiration

oxygen photosynthesis sun

water

14. The main source of energy for all life on Earth is the

.

15. Heterotrophs use

to obtain energy to function.

16. The cycle begins when carbon

dioxide is involved in a chemical reaction to form three-carbon

sugars.

Graph A Graph B

Increasing light intensity Temperature (°C)

Effect of Light Intensity on Photosynthesis Effect of Temperature on Photosynthesis

5 10 15 20 25 30 35 40 45 50

Rate

of

ph

oto

syn

thesis

Rate

of

ph

oto

syn

thesis

Copyright © by Holt, Rinehart and Winston. All rights reserved.

Holt Biology 29 Photosynthesis and Cellular Respiration

Name Class Date

Chapter Test continued

17. is used in the electron transport

chain of aerobic respiration.

18. A process that does NOT require oxygen is

.

19. is the process that changes light

energy to chemical energy.

20. During photosynthesis, oxygen gas is produced when

molecules are split.