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Bio 4th Year > Photosynthesis > Flashcards

Photosynthesis Flashcards

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Biology 101 flashcards
1
Q

Nitrate deficient

A

Limited growth
Fewer proteins made

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2
Q

Phosphate deficient

A

Poor root growth
Less minerals are absorbed

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3
Q

Potassium deficient

A

Yellow leaves and dead spots
Parts of the leaf can’t respire

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4
Q

Magnesium deficient

A

Leaves turn yellow
Less chlorophyll made

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5
Q

Limiting factor

A

When it’s in short supply it limits rate of photosynethis

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6
Q

Upper empidermis

A

Cells are relatively transparent so light can pass through to chloroplasts

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7
Q

Palisade mesophyll

A

Many chloroplasts
Long and thin so more can fit at top

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8
Q

Spongy mesophyll

A

Loosely packed cells
Many air spaces provide large SA for gas exchange

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9
Q

Lower epidermis

A

Small pores called stomata allow CO2 to move in for photo and O2 to leave by diffusion.

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10
Q

Guard cells open in day

A

Water enters by osmosis
GC swell become turgid so stomata is open for GE in day

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11
Q

Guard cells open in night

A

Water leaves by osmosis
GC shrivel become flaccid stomata closed preventing water loss at night

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12
Q

Ways plants use glucose produced by photosynthesis

A

Cellulose
Lipids
Proteins
Sucrose- transportation
Storage- starch
Respiration- energy

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13
Q

Equation for photosynthesis

A

6CO2 + 6H2O -> C6H12O6 + 6O2

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14
Q

Leaf covered with stencil

A

In Light turned blue/black
Covered stayed brown
Light allowed photo. Glucose produced + stored as starch

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15
Q

Chlorophyll and no chlorophyll on leaf

A

C part blue/black
No C part stayed brown
C allows photo. Glucose produced + stored as starch

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16
Q

Limiting rates of photo

A

Light intensity
Temp
CO2 conc

17
Q

Effect of light on photo

A

No light, energy, photo
Increase light, energy, photo
Another factor limiting rate

18
Q

Effect of temp on photo

A

Temp + photo increase
OT decrease
Temp increase + KE of enzymes. More collision + photo.
After OT enzymes denature and photo decrease

19
Q

Effect of CO2 on photosynthesis

A

As CO2 increases, rate of photo increase until a point where it plateaus.

20
Q

Hydrogen carbonate indicator

A

Bright light- photo>resp
Decrease CO2. Purple.
Dark light- resp>photo
Increase CO2. Yellow
No leaf to increase or decrease CO2 concentration. Orange

21
Q

Steps to test leaf for starch

A

Pour boiling H2O beaker
Leaf in boilin H2O 1 min
Forceps, remove leaf
Leaf in bottom boil tube
Add ethanol. Decolorize.
Remove. Brittle.
Re-soften H2O. Whitetile
Flood with iodine.
Starch- blue-black

22
Q

Why place leaf in boiling water for 1 min

A

Kills leaf. Stops enzyme action. Softens leaf tissue so material enters or leaves

Bio 4th Year (9 decks)

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