2.3.1 Photosynthesis Flashcards

1
Q

What is the photosynthesis equation?

A

light energy

carbon dioxide + water glucose + oxygen

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2
Q

What happens during photosynthesis?

A

■ light energy is absorbed by a green substance
called chlorophyll, which is found in chloroplasts in
some plant cells and algae
■ this energy is used by converting carbon dioxide
(from the air) and water (from the soil) into
sugar (glucose)
■ oxygen is released as a by-product.

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3
Q

How can the rate of photosynthesis be limited? Name 3 ways.

A

■ shortage of light
■ low temperature
■ shortage of carbon dioxide.

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4
Q

What happens the the glucose produced in photosynthesis?

A

The glucose produced in photosynthesis may be
converted into insoluble starch for storage. Plant cells
use some of the glucose produced during
photosynthesis for respiration.

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5
Q

What is the glucose used for? Name 3 ways.

A

■ to produce fat or oil for storage
■ to produce cellulose, which strengthens
the cell wall
■ to produce proteins.

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6
Q

What is needed to produce proteins?

A

To produce proteins, plants also use nitrate ions that

are absorbed from the soil.

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