Photosynthesis Overview - Chapter 4.2 - 2018 - Kathy Egbert | Library

Vocabulary. Use each term in the word bank below once for the following 6 vocab questions:

Calvin Cycle electron transport chain photosystems

chlorophyll light-dependent reaction thylakoid

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1. (Vocab) Coin-shaped compartment that contains light-absorbing molecules. You must type the term correctly to receive credit.

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2. (Vocab) A series of chemical reactions that produces sugars from carbon dioxide. You must type the term correctly to receive credit.

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3. (Vocab) A series of proteins in the thylakoid membrane that transfer high-energy electrons. You must type the term correctly to receive credit.

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4. (Vocab) Two groups of molecules in the thylakoid membrane that capture and transfer energy. You must type the term correctly to receive credit.

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5. (Vocab) Reaction that captures energy from sunlight and transfers energy to the light-independent reactions. You must type the term correctly to receive credit.

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6. (Vocab) Light-absorbing molecule in thylakoid membrane. You must type the term correctly to receive credit.

Vocabulary Check

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The prefix "photo-" means

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When talking about photosynthesis, the word "synthesis" means to bring together molecules to make glucose.

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The prefix "chloro-" means

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The suffix "-phyll" means

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The Calvin Cycle is also called

A the light independent reactions

B the light dependent reactions

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Light independent means that light is required to complete the reaction.

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Light dependent means that light is not required to complete the reaction.

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Stomata are openings on plants that allow for gas exchange.

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Photoinhibition is when the rate of photosynthesis is decreased or even stopped due to excessive light exposure resulting in the reduction of plant growth.

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The distinction between C3, C4, and CAM plants is the intermediate substance that is made prior to the Calvin Cycle. These modifications allow C3 plants to grow in cooler regions, C4 plants to grow in hot climates, and CAM plants to grow in very dry environments.

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Corn is an example of a C4 plant which can tolerate hot weather conditions.

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Pineapple is an example of a CAM plant. The malic acid stored in the fruit can cause canker sores in your mouth when you eat too much fresh pineapple.

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Approximately how much chlorophyll was present in the low-light plants after 24 hours?

A about 200 micrograms/g

B about 225 micrograms/g

C about 300 micrograms/g

D about 400 micrograms/g

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Approximately how much chlorophyll was present in the moderate-light plants after 24 hours?

A about 200 micrograms/g

B about 225 micrograms/g

C about 300 micrograms/g

D about 400 micrograms/g

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One similarity about the chlorophyll content between the low and moderate light seedlings is:

A Both seedling groups have about the same amount of chlorophyll content for the first 12 hours of growth.

B Both seedling groups have the exact same amount of chlorophyll content for the first 8 hours of growth.

C Both seedling groups have the exact same amount of chlorophyll content for the first 3 to 5 hours of growth.

D Both seedling groups have the exact same amount of chlorophyll content for the last 24 hours of growth.

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One of the differences in the seedling groups is

A after 12 hours moderate light plants have a greater chlorophyll content than the low light plants.

B after 8 hours moderate light plants have a greater chlorophyll content than the low light plants.

C after 5 hours moderate light plants have a greater chlorophyll content than the low light plants.

D after 3 hours moderate light plants have a greater chlorophyll content than the low light plants.

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To which of the two lighting conditions would you expose seedlings if you wanted to maximize the rate of photosynthesis in the plants as well as minimizing your costs for electricity to light the plants in the greenhouse?

A Low light only.

B Moderate light only.

C Low light for the first 12 hours and then moderate light afterwards.

D Moderate light for the first 12 hours and then low light afterwards.

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REVIEW: The independent variable in this experiment is

A the amount of light the plants receive.

B the amount of chlorophyll in the plant leaves.

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REVIEW: The dependent variable in this experiment is

A the amount of light the plants receive.

B the amount of chlorophyll in the plant leaves.

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One of the constants in the experiment was that the chloropyll content was measured every 48 hours.

A True

B False