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Biology > Chapter 8-Photosynthesis > Flashcards

Chapter 8-Photosynthesis Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

The final product of the Calvin Cycle is

A

G3P

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2
Q

Photosynthesis takes place in the membranes of small sacs called

A

Thylakoids

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3
Q

The dark reaction in photosynthesis is limited by

A

CO2, temperature, and light

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4
Q

During what stage of photosynthesis is O2(Oxygen) produced?

A

The light dependent reactions involving photosystem I and II

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5
Q

Colors of light most useful in photosynthesis are

A

Red, violet, and blue

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6
Q

The pigment molecules responsible for photosynthesis are located in the

A

Thylakoid membrane of the chloroplast

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7
Q

Both carotenoids and chlorophylls

A

Are pigments.

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8
Q

The light reaction of photosynthesis does not include

A

Oxygen Liberation

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9
Q

Which of the following is the correct sequence for the movement of electrons during the light-dependent reactions of plants?

A

water à P680 à P700 à NADP+

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10
Q

What pigment is used in human vision?

A

retinal

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11
Q

During what stage of photosynthesis are ATP and NADPH converted to ADP + Pi and NADP+?

A

the light-independent reactions

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12
Q

Water vapor exits and CO2 enters a leaf through the

A

stomata

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13
Q

Which of the following organisms have the greatest problem with photorespiration?

A

C3 Plants

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14
Q

What energy-rich organic compound is produced as a result of the Calvin cycle?

A

glucose

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15
Q

High-energy photons

A

have short wavelengths

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16
Q

Light that is visible to humans occupies what part of the electromagnetic spectrum?

A

a small portion in the middle

17
Q

During photosynthesis, photons raise electrons to higher energy levels. These excited electrons belong to what compound?

A

chlorophyll

18
Q

Which of the following occurs during the light-dependent reactions of plants?

A

electron transport, chemiosmosis, splitting of water

19
Q

Compared to retinal, chlorophyll can be described as a pigment that has a

A

narrow absorption range but high efficiency

20
Q

The earliest photosynthesizers probably used what as a source of hydrogen?

A

H2S

21
Q

How many carbon atoms are in a molecule of RuBP?

A

five

22
Q

The oxygen that is released as O2 during photosynthesis came from _____________ molecules.

A

water

23
Q

Which of the following is mismatched?

A

CAM plants - open their stomata during the day and close them at night to avoid photorespiration

24
Q

Which of the following statements about photosynthesis is true?

A

the light-dependent reactions produce the energy-rich compounds that are used to run the light-independent reactions

25
Q

Which of the following statements accurately describes the relationship between photosynthesis and cellular respiration?

A

photosynthesis uses solar energy to convert inorganics to energy-rich organics; respiration breaks down energy-rich organics to synthesize ATP

26
Q

In sulfur bacteria, how many pigment electrons must get transported during cyclic photophosphorylation to produce one molecule of ATP?

A

three

27
Q

Production of one molecule of 3-phosphoglyceraldehyde requires how many turns of the Calvin cycle?

A

3

28
Q

To reduce six molecules of carbon dioxide to glucose via photosynthesis, how many molecules of NADPH and ATP are required?

A

12 NADPH and 18 ATP

29
Q

The primary form of sugar transported from the site of photosynthesis to the rest of the plant is:

A

sucrose

30
Q

Rubisco:

A

catalyzes the carboxylation of CO2 to ribulose 1,5-bisphosphate.
and initiates photorespiration when the CO2/O2 ratio is low.

31
Q

The immediate products of C3 and C4 photosynthesis are, respectfully:

A

3-phosphoglycerate; oxaloacetic acid

32
Q

Light-driven electron transport in the chloroplast pumps H+ into the intermembrane space between the outer and inner membranes.
(true or false)

A

FALSE

33
Q

CO2 fixation occurs within the storm.

false or true

A

TRUE

34
Q

If you know the absorption spectrum of a pigment, you can predict the pigment’s color.
(true or false)

A

TRUE.

35
Q

For every CO2 molecule fixed by photosynthesis, one molecule of O2 is produced.
(true or false)

A

TRUE

36
Q

Light is required for the light dependent reactions because

A

it energizes electrons in the reaction center

Biology (3 decks)

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