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VCE Biology Unit 3 & 4 > Photosynthesis > Flashcards

Photosynthesis Flashcards

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1
Q

Photosynthesis

A

The process in which light energy is transformed into chemical energy and stored in organic molecules. Occurs in the chloroplast

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2
Q

Balanced equation

A

12H2O + 6CO2 = C6H12O6 + 6O2 + 6H2O

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3
Q

Stages of photosynthesis

A

Light dependant, light independent

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4
Q

Light Dependent Stage

A

In the absence of light this stage cannot proceed and photosynthesis will stop.
Occurs in the chloroplast’s thylakoids.

Produces O2 gas and H+ ions which are carried by coenzyme NADPH to give energy in light independent stage.

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5
Q

Light Independent Stage

A

Uses charged NADPH molecule for energy.

Does not depend directly on light being available.

Occurs in the Stroma.

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6
Q

Function of Photosynthesis

A

Overall function is to trap light energy and convert it to chemical energy in the form of ATP and NADPH

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7
Q

Inputs of Light Dependent

A

Water, NADP, ADP

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8
Q

Inputs of Light Independent

A

NADPH, Carbon Dioxide, ATP

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9
Q

Outputs of Light Dependent

A

NADPH, Oxygen, ATP

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10
Q

Outputs of Light Independent

A

NADP, Water, ADP, Pi, Glucose

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11
Q

Function of NADP/NADPH

A

Collects hydrogen ions for the transport to the light independent stage

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12
Q

Function of ATP

A

Energy carrier when charged with Pi. Energy is used in the light independent phase

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13
Q

Functions of Water

A

Source of hydrogen ions for making glucose

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14
Q

Functions of Carbon Dioxide

A

Source of carbon and oxygen ions for making glucose

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15
Q

Chloroplast

A

Site of photosynthesis in plants and algae.

Possesses DNA that consists of circular double-stranded DNA, not nuclear.
Divides via binary fission
Contains its own ribosomes

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16
Q

Factors affecting the rate of photosynthesis

A

Light Intensity - chlorophyll requires light to conduct the dependent reactions,

Temperature - photosynthesis enzymes and reactant molecules move more rapidly with increasing temperature,

Carbon Dioxide concentration - reactant for light-independent stage, as CO2 rises, the rate of photosynthesis will increase until the active sites of enzymes involved in photosynthetic reactions are saturated

VCE Biology Unit 3 & 4 (15 decks)

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