51 terms

Photosynthesis SG 2012

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Organisms, such as plants, that make their own food are called
autotrophs
Organisms that cannot make their own food and must obtain energy from the foods they eat are called
heterotrophs
Which of the following is an autotroph?
tree
Which of the following is NOT an example of a heterotroph?
grass
What are the three parts of an ATP molecule?
adenine, ribose, phosphate groups
Which of the following is NOT a part of an ATP molecule?
chlorophyll
Energy is released from ATP when
a phosphate group is removed
Which if the following is NOT a true statement about ATP?
Used ATP is discarded by the cell as waste
Look at Figure 8-1. All of the following are parts of an ADP molecule EXCEPT
Structure D
Which structures shown in Figure 8-1 make up an ATP molecule?
A, B, C, and D
Jan can Helmont concluded that plants gain most of their mass from
water
Which scientists showed that plants need light to grow?
Priesrtly and Ingenhousz
Ingenhousz showed that plants produce oxygen bubbles when exposed to
Light
Suppose Priestley repeated his experiment using many kinds of plants besides mint, and that when different plants under the jar remained lighted for different periods of time. What would be alogical conclusion from these experiments?
Different plants release different amounts of oxygen
A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27'C. The gas being collected is probably.
oxygen
In Figure 8-1, between which parts of the molecule must the bonds be broken to form an ADP molecule?
all of the above
Which of the following is(are) used in the overall reactions for photosynthesis?
all of the above
Photosynthesis uses sunlight to convert water and carbon dioxide into
oxygen and high-energy sugars and starches
In the overall equation for photosynthesis, six molecule of carbon dioxide result in six molecules of
oxygen
Plants gather the sun's energy with light-absorbing molecules called
pigments
Plants take in the sun's energy by absorbing
sunlight
Most plants appear grean because chlorophyll
does not absorb green light
Which region of the visible spectrum is not absorved well by chlorophyll?
green
A granum is a
stack of thylakoids
The stroma is the region outside the
thylakoids
Where in the chloroplast is chlorophyll found?
in the thylakoid
Which of the following is false?
A stroma contains a thylakoid
Where do the light-dependent reactions take place?
in the stroma
What are the products of the light-dependent reactions?
all of the above
Which step is the begininning of photosynthesis?
High-energy electrons move through the electron transport chain.
Which of the following is NOT a step in the light-dependent reactions?
ATP and NADPH are used to produce high-energy sugars.
Which of the following is inside the thylakoid membrane?
All of the above
Why does the inside of the thylakoid membrane become positively charged during the light-dependent reactions?
H+ ions are released as water splits
Which pathway represents the flow of electrons during photosynthesis?
H20-NADPH-Calvin Cycle
Where are photosystems I and II found?
in the thylakoid membrane
The Calvin Cycle is another name for
light-independent reactions
The Calvin Cycle takes place in the
stroma
What is a product of the Calvin Cycle?
high-energy sugars
How does the Calvin Cycle differ from the light-dependent reactions?
It takes place in the stroma
If carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high-energy sugars?
No sugars will be produced.
Which of the following affects the rate of photosynthesis?
All of the above
If you continue to increase the intensity of light that a plant receives, what happens?
The rate of photosynthesis increases and then levels off
What would you expect to happen to plants at temperatures greater than 45'C?
They will have a less than optimal rate of photosynthesis.
Which of the graphs in Figure 8-2 represents the effect of temperature on the rate of photosynthesis?
C
Which of the graphs in Figure 8-2 represents the effect of light intensity on the rate of photosyntheis?
A
Ultimately, the energy that a carnivore, such as a wolf, uses comes from sunlight
True
Heterotrophs require oxygen
True
ADP is one of the principal chemical compounds that living things use to store energy.
F, ATP
The substance represented in Figure 8-1 is called ATP
True
If a plant and a burning candle are placed under a bell jar, the candle will burn because the plant gives off carbon dioxide
False, oxygen
Plants gather the sun's energy with light-absorbing molecules called pigments
False, chlorophyll