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Bio 115 > Photosynthesis > Flashcards

Photosynthesis Flashcards

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Biology 101 flashcards
1
Q

Photosynthesis

A

Plant makes its own food (sugar)

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2
Q

Plants use ____ to make sugar

A

Light energy (sunlight)

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3
Q

Inputs of photosynthesis

A

CO2
H2O
Photon Energy

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4
Q

Outputs of photosynthesis

A

O2
Storable chemical energy (sugars, C-H bonds)

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5
Q

Light dependent reactions

A

Uses captured light energy to split H2O, which is used to synthesize ATP and NADPH

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6
Q

Light Independent reactions

A

Calvin cycle, carbon fixation using energy from light dependent reactions

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7
Q

Chloroplast

A

Photosynthetic organelle found within the leaf mesophyll

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8
Q

Any ____ part of a plant can photosynthesize

A

Green

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9
Q

How are chloroplasts organized?

A

-Double membrane (completely smooth)

-Thylakoid (disc shaped membranes)

-

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10
Q

What are imbedded inside thylakoids?

A

Photosynthetic pigments and e-transport chain(s)

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11
Q

Granum

A

Thylakoid stack

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12
Q

Thylakoid space

A

Fluid filled space between thylakoids

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13
Q

Stroma

A

Liquid-like interior
Enzymes used to convert CO2 into sugar

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14
Q

Chlorophyll a

A

Green in color

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15
Q

Accessory pigments

A

Chlorophyll b and carotenoids

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16
Q

Longer wavelengths mean

A

Lower energy

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17
Q

Shorter wavelengths mean

A

Higher energy

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18
Q

Different pigments absorb….

A

Different wavelengths of light

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19
Q

Most plants do not absorb green wavelengths because…

A

Most plants are REFLECTING green light (they are green)

20
Q

What does a chlorophyll molecule look like?

A

Porphyrin ring with a hydrocarbon tail

21
Q

What happens when light is absorbed?

A

Electrons within photosynthetic pigments enter an excited state

22
Q

Resonance

A

AYO LISTEN UP

-Energy in an electron is transferred to a nearby pigment

23
Q

Reduction/Oxidation

A

An electron is transferred to a new compound

24
Q

Fluorescence

A

An electron drops back down to lower energy levels; heat and fluorescence are emitted

25
Q

What does PEA stand for?

A

Primary electron acceptor

26
Q

What substance flows across a membrane that generates energy for ATP synthesis?

A

Hydrogen

27
Q

A new flower species has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are NOT being absorbed by this pigment?

A

Red & Yellow

28
Q

Chloroplasts, like mitochondria, _________.

A

utilize an electron transport chain and chemiosmosis

29
Q

Oxidation of water and reduction of NADP+ occurs during

A

Photosynthesis

30
Q

Electrons flow along an electron transport chain during

A

Photosynthesis and cellular respiration

31
Q

Oxidative phosphorylation and the generation of proton gradients occur during

A

Photosynthesis and cellular respiration

32
Q

Oxygen is reduced during

A

Cellular respiration

33
Q

What are the final products (or “outputs”) of the light-dependent reactions of photosynthesis?

A

O2
NADPH
ATP

34
Q

What are the molecules that go into (are the “inputs” for) the light-dependent reactions of photosynthesis?

A

Light
NADP+
ADP+P
Water

35
Q

What are the molecules that go into (are the “inputs” for) the Calvin cycle?

A

NADPH
ATP
CO2

36
Q

What are the final products (or “outputs”) of the Calvin cycle?

A

NADP+
Sugar
ADP+P
Water

37
Q

Carbon fixation involves the addition of carbon dioxide to

A

RuBP using RuBisCo

38
Q

After 3-PGA is phosphorylated, it is reduced by

A

NADPH

39
Q

How many carbon dioxide molecules must be added to RuBP to make a single molecule of glucose?

A

six

40
Q

In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from five G3P molecules?

A

three

41
Q

What are the three main steps of the calvin cycle?

A

carbon fixation
reverse glycolysis
reformation of rubp

42
Q

what is the calvin cycle also known as?

A

light-independent reactions

43
Q

reverse glycolysis forms

A

energy rich CH bonds

44
Q

how many G3P are needed to make one glucose molecule?

A

2

45
Q

In an experiment, the thylakoids are removed from the chloroplasts of a plant cell and kept in a culture medium. The culture is exposed to sunlight, CO2, and water, but no sugars are formed. What is the most likely explanation for this result?

A

The area within a plant cell where sugar is created is no longer present

Bio 115 (9 decks)

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