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AP Biology > Photosynthesis > Flashcards

Photosynthesis Flashcards

1
Q

What color is the Chlorophyll a pigment?

A

Blue green

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2
Q

What color is the Chlorophyll b pigment?

A

Yellow/green

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3
Q

What color are the cartenoid pigments?

A

Orange / red

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4
Q

What color are xanthophyll pigments?

A

Yellow

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5
Q

What color are anthocyanin pigments?

A

Red / purple

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6
Q

What is chlorophyll?

A

The green pigment found in chloroplasts

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7
Q

Why do plants appear green?

A

Chlorophyll reflects the green light but absorbs all others

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8
Q

What are the overall products of the light-dependent reactions?

A

Oxygen, NADPH

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9
Q

What are the overall products of the Calvin cycle?

A

NADP+ and ADP+P

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10
Q

What pigment is found in Photosystem II?

A

P680

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11
Q

What pigment is found in Photosystem I?

A

P700

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12
Q

What two chemicals/enzymes are involved in the electron transport chain in photosynthesis?

A

Plastoquinone and Cytochrome complex plastocyanin

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13
Q

Is the electron transport chain exergonic or endergonic?

A

Exergonic

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14
Q

What is noncyclic electron flow?

A

When electrons are not recycled within the photosystems

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15
Q

Why would a plan go into cyclic electron flow?

A

When ATP levels are low

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16
Q

Which type of electron flow produces roughly equal amounts of NADPH and ATP?

A

Noncyclic

17
Q

What are the “ins” of the light-dependent reactions?

A

Light
Water
ADP
NADP

18
Q

What are the “outs” of the light-dependent reactions?

A

ATP
Oxygen
NADPH

19
Q

Why is the Calvin cycle sometimes referred to as the “dark reactions?”

A

They don’t rely on photons from the sun

20
Q

Where does the Calvin cycle occur?

A

The stroma

21
Q

Where do the light-dependent reactions take place?

A

Thylakoid membrane

22
Q

What is a granum?

A

A stack of thylakoids

23
Q

What are the “ins” of the Calvin cycle?

A

ATP
CO2
NADPH

24
Q

What are the “outs” of the Calvin cycle?

A

G3P

NADP+

25
Q

What two chemicals/enzymes are involved in the ETC of PS I?

A

Ferrodoxin (Fd)

NADP+ reductase

26
Q

What is photophosphorylation?

A

As electrons move from PS II to PS I, H+ are pumped into the thylakoid, creating a concentration gradient and producing ATP as the ATP synthase restores the concentration gradient

27
Q

What is cyclic electron flow?

A

Basically Photosystem I over and over

28
Q

What is the main purpose of the Calvin cycle?

A

To make sugar (G3P or glucose)

29
Q

What is Phase 1 of the Calvin cycle?

A

Rubisco binds RuBP with CO2

30
Q

What is Phase 2 of the Calvin cycle?

A

Reduction to form G3P

31
Q

What is Phase 3 of the Calvin cycle?

A

Regenerate RuBP with some help from ATP

32
Q

What is RuBP?

A

Ribulose BisPhosphate

AP Biology (11 decks)

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