Biology Photosynthesis Test

Mark the best answer on your bubble sheet.

1. When light strikes an object, the light may be

A. reflected. B. transmitted C. absorbed. D. All of the above

A. photosystem 1 B. chlorophyll b C. prism D. pigment

A. red B. green C. purple D. maroon

A. 4 B. 1 C. 3 D. 2

A. becomes reduced to form NADPH. C. is needed to form chlorophyll.

B. provides additional oxygen atoms. D. provides protons and electrons for reactions
6. If you were to travel first to the Bahamas, then to the Mojave Desert and then back home to Ohio, what order would you see the different types of photosynthetic pathways in the vegetation (plant life) around these areas?
A. C3, C4, CAM B. C4, CAM, C3 C. C3, CAM, C4 D. CAM, C4, C3
7. The light reactions start when this photosystem’s electrons are excited

A. photosystem I B. photosystem II C. photosystem IV D. chlorophyll

A. respiration B. carbon fixation C. fermentation D. electron transport

A. absorb all wavelengths of light C. absorb only yellow and orange light

B. are not directly involved in the light reactions D. have no function in photosynthesis

For questions 10 and 11, refer to the figures below.

10. Graph A demonstrates that the rate of photosynthesis…..

A. decreases in response to increasing light intensity

B. increases indefinitely in response to increasing light intensity

C. increases in response to increasing light intensity but only to a certain point

D. All of the above

A. photosynthesis is independent of environmental influences

B. increases in light intensity cause increases in temperature

C. the rate of photosynthesis increases as the temperature eventually decreases

D. the rate of photosynthesis is affected by changes in the environment
12. To produce the same amount of carbohydrate (organic compounds), C4 plants lose less

A. ATP than C3 plants C. water than C3 plants

B. carbon dioxide than C3 plants D. RuBP than C3plants
13. In order for a 3-PGA molecule to become a G3P molecule, what is the first step that needs to

occur?

B. a phosphate group is added to 3-PGA D. the stomata need to close

A. combine with NADP to form NADPH C. combine with ADP to form ATP.

B. are ejected out of the membrane, into the stroma. D. enter photosystem II
15. biochemical pathway : reaction ::

A. barrier : wall C. match : burn

B. theater : drama D. assembly line : workers
16. Chemiosmosis in the thylakoid membrane is directly responsible for

A. adding protons to NADP+ C. providing the energy to produce ATP molecules.

B. producing ATP-synthetase. D. generating glucose molecules.
17. C3, C4, and CAM plants differ from each other in that

A. C3 plants use the Calvin cycle for carbon fixation and C4 and CAM plants use different

pathways for carbon fixation

B. C3 plants have their stomata open during the day and C4 and CAM plants have their

stomata open only at night

C. C3 and C4 plants have their stomata open during the day and CAM plants have their

stomata open only at night

D. C3 plants use CO2 to form organic compounds and C4 and CAM plants use other sources

of carbon
18. When the temperature of an environment begins to increase, how is the photosynthetic rate affected?
A. it keeps increasing until all of the organic compounds are made

B. it increases until the enzymes stop working correctly

C. the stromas start to open even more making it go faster

D. nothing happens

A. carbon dioxide gradient C. proton gradient

B. osmosis D. NADP+ gradient
20. How does a molecule of G3P turn back into RuBP?

A. magic C. ATP

B. protons D. NADPH

Solo Scientist Section
21. What islands did Darwin make famous on his travels?

A. Canary Islands C. Pacific Islands

B. Hawaiian Islands D. Galapagos Islands
22. What did Alexander Fleming discover that had a dramatic effect on the pharmaceutical

(drug) industry?

A. bacteriology B. penicillin C. amoxicillin D. tropomyicin
23. Gregor Mendel studied different phenotypes and genotypes of these types of plants

A. pea plants B. flowering plants C. crab grass D. cotyledons

24. Watson was the recipient of a Nobel Prize because he helped steal research from this famous scientist

A. James Wilkins B. Rachel Carson C. Rosalind Franklin D. Marie Curie

25. Jan Ingenhouz took care of this famous royal in Austria in 1768

A. Queen Elizabeth C. Empress Marie Theresa (Marie Antoinette)

For questions 1-8, Write the name of the molecule for each numbered step and also write the number of molecules necessary for the reaction. Write the answers on the lines provided.

1.___________________________________ 5.__________________________________

2.___________________________________ 6.__________________________________

3.___________________________________ 7._________________________________

4.___________________________________ 8._________________________________

9. When electrons are lost and transferred to the primary electron acceptor this is

a(n)___________________reaction.

10. 3-PGA is a ___________________carbon molecule that will undergo two steps to turn into G3P.

11. In the light reactions, the enzyme ATP-synthase harnesses the _______________________that the concentration gradient makes available to produce ATP.

Essay Question

In no more than 5 sentences, summarize the process of photosynthesis. Write your answer on the lines bellow.

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