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BIO 141 > chapter 10 > Flashcards

chapter 10 Flashcards

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Biology 101 flashcards
1
Q

process of converting light energy into chemical energy

A

photosynthesis

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2
Q

what is light energy caught by?

A

chlorophyll

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3
Q

what causes the release of oxygen?

A

splitting of water molecules

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4
Q

what does the calvin cycle require?

A

ATP, CO2, NADPH

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5
Q

what is the relationship between photosynthesis and cellular respiration?

A

photosynthesis stores energy, and CR releases energy

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6
Q

where does photosynthesis occur?

A

chloroplasts

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7
Q

what makes their own energy?

A

autotrophs

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8
Q

what consumes other organisms for energy?

A

heterotrophs

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9
Q

organisms that use light to synthesize

A

photoautotrophs

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10
Q

major site of photosynthesis

A

leaves

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11
Q

where are chloroplasts found

A

mesophyll (interior tissue of leaf)

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12
Q

where does gas exchange occur

A

stomata

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13
Q

what is the structure of chloroplasts?

A

stroma: dense fluid
thylakoids: sacs containing chlorophyll
grana: stacks of thylakoid

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14
Q

what is photosynthesis

A

endergonic

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15
Q

2 stages of photosynthesis

A

light reactions and calvin cycle

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16
Q

ADP to ATP; proton motive force generated across thylakoid membrane

A

photophosphorylation

17
Q

range of visible light

A

380nm-750nm

18
Q

electrons absorb energy from light, going from stable to unstable

A

excited state

19
Q

reaction center complex surrounded by light harvesting complexes

A

photosystem

20
Q

describe light reactions

A

converts solar into chemical
occurs in thylakoids
starts with water and light energy, ends with ATP and NADPH

21
Q

what is the first step of light reactions?

A

the solar-powered transfer of electrons from chlorophyll a to primary electron acceptor

22
Q

2 types of photosystem

A

PSII: occurs first (680nm)

PSI (700nm)

23
Q

difference between linear and cyclic electron flow

A

linear: produces ATP and NADPH
cyclic: only ATP

24
Q

what evolved first

A

cyclic

25
Q

calvin cycle is

A

light-independent, anabolic, occurs in stroma, forms sugars

26
Q

3 phases of calvin cycle

A

carbon fixation, reduction, regeneration

27
Q

building material of chromosomes

A

chromatin

BIO 141 (11 decks)

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