Photosynthesis Test (Ch.3) Flashcards Preview

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Flashcards in Photosynthesis Test (Ch.3) Deck (20)
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1

The one thing that all photosynthetic organisms have in common is chlorophyll.

True

2

Light is a form of energy that travels in wave packets called protons.

False

3

During photosynthesis, light energy is transferred to ADP and NADP+, forming ATP and NADPH.

True

4

The reactions of carbon fixation depend on the light reactions to supply ATP and NADPH.

True

5

Most plants are green because that is the color of light they need for photosynthesis.

False

6

The light-saturation point is the light intensity at which the carbon fixation reactions reach a maximum overall rate.

True

7

In comparing respiration and photosynthesis, respiration releases energy while photosynthesis stores energy.

True

8

Land plants get the CO2 they need for photosynthesis mostly from...

the atmosphere

9

Which of the following is not a characteristic of the light reactions?

carbon fixation happens

10

Which of the following statements concerning the Calvin Cycle is true?
I. ATP molecules are needed to keep the reactions going.
II. The process makes NADPH + H+
III. reduction occurs
IV. oxygen is a product
V. photophosphorylation occurs
VI. carbon fixation occurs
VII. takes place in the thylakoids of chloroplasts

I, III, and VI
( ATP molecules are needed to keep the reactions going, reduction occurs and carbon fixation occurs).

11

Ultimately, the light reactions

form ATP and NADPH + H+

12

When photosynthesis occurs, the oxygen that is released comes from...

water

13

In photosynthesis, the function of water is to

supply free electrons

14

a) The table below summarizes data obtained in an experiment on oxygen released by different plant species grown under different lighting conditions. Assume that the plants are of comparable size.

Plant Type of light V of O2 T Time (days)
Corn Incandescent 200 20 5
Corn Fluorescent 400 22 10
Barley Incandescent 200 22 5
Barley Fluorescent 150 22 5
A fair comparison can only be made on...

b) Which of the following is a reasonable interpretation?

a) barley leaves under both lighting conditions


b) oxygen production is more rapid in barley in incandescent light than fluorescent light.

15

In green plants, respiration takes place

all of the time

16

Photosynthesis takes place within ________ in three stages: a)_______ light energy, b) synthesizing_______ and _________ and c) the _____ cycle. Stages a) and b) comprise the _______ reactions, while carbon dioxide is fixed into carbohydrates in stage c), which can also be referred to as the ______ ________ reactions.

chloroplasts
absorbing
NADPH and ATP
Calvin
Light
Light Independent

17

Name of the principle light-absorbing pigment in plants.

chlorophyll

18

Cells that regulate gas exchange in plants

guard cells

19

The major cellular site of photosynthesis

chloroplasts

20

Name of the opening that regulates gas exchange in plants

Stomata