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Photosynthesis Flashcards

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Biology 101 flashcards
1
Q

PSN equation

A

Light energy + CO2 + H2O= carbohydrates + O2

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2
Q

Carbohydrates

A

Primary energy source in all living organisms

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3
Q

Cellular Respiration

A

Carbohydrates + O2 = H2O + CO2 + energy (ATP)

Reverse flow of PSN

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4
Q

Photo

A

Light

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5
Q

Synthesis

A

Put together

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6
Q

Photosynthesis

A

The first step of energy flow in both plants and animals

Energy from the sun is converted into chemical bond energy

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7
Q

Energy released in respiration is captured in phosphate bonds (ATP)
Cells can use this energy for…

A

Protein synthesis
Movement of ions across membranes
Even thoughts in the human brain

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8
Q

Pigments

A

Colored substances that absorb certain wavelengths of light. (Get color by reflecting other wavelengths)
Black absorbs all wavelengths

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9
Q

Separation of pigments

A

Chromotography
Grind up plants in a solvent (acetone)
Filter plant from solvent (chloroplasts)
Place a drop or pigment extract on filter and allow solvent to evaporate
Allow pigment to move up filter paper by capillary action

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10
Q

2 main chloroplast pigments

A

Green chlorophylls

Accessory pigments orange red carotenoids

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11
Q

Study by TW Engleman 1882

A

Strand of Spirogyra under microscope
Colored spectrum on strand
Bacteria that cluster to high O2 outputs

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12
Q

Action spectrum

A

Plot of effectiveness of a response caused by light against the wavelength to produce the response

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13
Q

Absorption spectrum

A

How much light is absorbed by a pigment

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14
Q

Light Reactions

A

The steps in PSN when photon energy is converted to chemical bond energy but no carbohydrates are formed

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15
Q

Photophosphorylation

A

Forming of ATPs in PSN

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16
Q

Synthesis reactions (dark)

A

Builds CO2 into carbohydrates using ATP from light reactions

17
Q

Light reactions simplified

A

Oxidation loses electrons
Reduction gains electrons
PSN is the oxidation of carbohydrates (releasing energy)

18
Q

Light Reaction Equation

A

2 photons + NADP + H2O = NADPH+ H + 1/2 O2

Photon energy+ ADP+P1= ATP + H2O

19
Q

C3
C4
CAM/C4

A

Calvin cycle
Deeper in leaf (dry/warm) day and night
Only at night

20
Q

Oxygen Cycle

A

Producers up/consumers down =homeostatic balance

Advanced Bio (14 decks)

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