Ch 11 Photosynthesis Flashcards

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1
Q

Word and chemical equation

A

6CO2+6H2O–>C6H12O6 +6O2

Carbon dioxide + water –> glucose and oxygen

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2
Q
Location
Source of
-light
-co2
-water
A

Chloroplasts
Sun
Air/ respiration
Enters plant through root, travels up stem

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3
Q

Products and their fate

A

O2 + Glucose
Fate ofO2
Used by plant or respiration
Passes out of plant through stomata

Fate of Glucose
Respites
Stored as starch

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4
Q

Importance of photosynthesis

A

Provides food
Provides O2
Reduces levels of CO2

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5
Q

Summary of photosynthesis

A

Light is absorbed
Water is spilt
Hydrogen combined with co2 to make glucose
Oxygen is released as a by product

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6
Q

1) light is absorbed

A

Light is trapped by chlorophyll

Provides energy to make glucose

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7
Q

2) water is spilt

A
Light energy is used to spilt H2O into
-oxygen gas
-protons
-electrons
                     \+      _
2H2O-->4H + 4e  +O2
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8
Q

3)Light energises electrons

A

Electrons pass to chlorophyll to become energise

This changes them into high energy electrons

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9
Q

4)Glucose is formed

A

High energy electrons and protons from proton pool are combined with co2 to form glucose

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10
Q

Light stage

A

Requires light
Location: grana
Chlorophyll made up of pigments
Pigments arranged in funnel shaped photo systems
Pigments absorb light energy and transfer to the chlorophyll
Chlorophyll absorbs them-> become high energy electrons
They pass to electron acceptor

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11
Q

Light stage pathway 1

A

Electrons picked up by acceptor, passed through carriers back to chorolopgyl lose energy

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12
Q

Light stage pathway 2

A

H2O spilt protons to proton pool, NADP- formed electrons picked up by acceptor passed through carriers ATP produced

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13
Q

non cyclic photophosphroylation

A

Electrons that return to chlorophyll are not the original

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14
Q

End products of light stage

A

ATP-> provides energy for dark stage
NADPH-> provides protons + high energy electrons
O2-> used for respiration

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15
Q

Dark stage

A

Location:stroma
Does not need light, can happen in light
Controlled by enzymes
CO2 from air enters chloroplasts combined with protons + electrons to form glucose

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16
Q

Role of ATP in dark stage

A

To provide energy

17
Q

Role of NADP

A

Provides hydrogen