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Biology Lab Practical > Lab Practical 2 > Flashcards

Lab Practical 2 Flashcards

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1
Q

What color does the wavelength around 400 correspond to?

A

Purple

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2
Q

What color does the wavelength around 600 correspond to?

A

Blue

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3
Q

What color does the center of the wavelength spectrum best correspond to?

A

Green

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4
Q

What color does the wavelength around 700 correspond to?

A

Red

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5
Q

What is the independent variable in the chlorophyll extraction lab?

A

Wavelength

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6
Q

What is the dependent variable in the chlorophyll extraction lab?

A

Absorbance

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7
Q

Which pigment is more soluble in ethanol?

A

Carotene

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8
Q

Which pigment is more soluble in petroleum ether?

A

Chlorophyll A

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9
Q

Which pigment is more soluble in methanol?

A

Chlorophyll B

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10
Q

Pigments do not absorb what kind of light well?

A

Green, it reflects it and that is why chlorophyll appears green

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11
Q

What does water contain that plants need?

A

Low energy electrons

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12
Q

What do plants need to do to low energy electrons?

A

Extract and energize

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13
Q

What is DPIP?

A

A lipid soluble dye

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14
Q

What color does DPIP turn when oxidized?

A

Blue

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15
Q

What color does DPIP turn when reduced?

A

Clear

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16
Q

What is the independent variable in the oxidation of water lab?

A

mL of chloroplasts

17
Q

What is the dependent variable in the oxidation of water lab?

A

Rate of reaction

18
Q

What is the relationship between the variables in the oxidation of water lab?

A

Direct linear

19
Q

What does KCl do in the oxidation of water lab?

A

Simulates a natural state for chloroplasts to keep them oxidizing water

20
Q

What does Bisulfite do in the oxidation of water lab?

A

Causes DPIP to lose color in the blank

21
Q

What did the buffer do in the oxidation of water lab?

A

Stabilize pH

22
Q

What is the independent variable in the oxygen production lab?

A

PFR (photon fluence rate) which was measured by changing the distance from the light source

23
Q

What is the dependent variable in the oxygen production lab?

A

Rate of O2 production

24
Q

What is the relationship between the variables in the oxygen production lab?

A

Direct linear

Biology Lab Practical (2 decks)

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