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Triple science > Photosynthesis > Flashcards

Photosynthesis Flashcards

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Biology 101 flashcards
1
Q

What is the word equation for photosynthesis?

A

Carbon dioxide + Water ——> Oxygen + Glucose

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2
Q

What is the symbol equation?

A

6CO2 + 6H2O ——> 6O2 + C6H12O6

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3
Q

Why is photosynthesis important?

A

Provides energy
Plants are food for us
It removes CO2 and releases O2

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4
Q

What type of energy is used?

A

Light energy

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5
Q

What factors effect rate of photosynthesis?

A

Temperature
No. of chloroplasts
Concentration of CO2
Light intensity

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6
Q

Why can the rate of photosynthesis plateau?

A

Because another limiting factor is stopping it from increasing

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7
Q

What were the variables of the photosynthesis investigation?

A

Dependant- No. of bubbles
Independent- Distance of ruler
Control- temperature and pond weed

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8
Q

What happened every time we doubled the distance of the lamp?

A

We quartered the light intensity

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9
Q

What did we discover about the rate of photosynthesis in the investigation?

A

The rate of photosynthesis is inversely proportional to the distance of the lamp from the plant

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10
Q

What is the inverse square law?

A

1/x2

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11
Q

Why is glucose important?

A 
For protein synthesis
For growth and repair
For respiration
For insoluble starch
For strengthening cell walls
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12
Q

Why is insoluble starch good?

A

Because it doesn’t effect the water potential

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13
Q

What do greenhouses have to speed up photosynthesis?

A

Clear glass
Artificial heat source
Additional CO2

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14
Q

What must happen for the greenhouse to be profitable?

A

The cost must not exceed additional income it generates

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15
Q

What is transpiration?

A

The loss of water (evaporation) from the stomata

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16
Q

What process does water and minerals move by?

A

Transpiration

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17
Q

How do water and minerals enter?

A
  1. Mesophyll cells lose water due to evaporation
  2. Cells now have lower water potential
  3. Water enters by osmosis
  4. Water is pulled up the stem via the xylem from the roots to the leaves
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18
Q

When do guard cells open and close?

A

When they are swollen they open and when they are shrunk they close

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19
Q

What can’t happen if the stomata is closed?

A

Water can’t evaporate

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20
Q

What is the role of the stems?

A

They support the leaves and flowers and also transports fluids from the roots to the leaves

21
Q

What is the role of the leaves?

A

They contain chloroplasts, which help with photosynthesis allowing the plat to grow

22
Q

What is the role of the roots?

A

They absorb water and minerals from the soil for the plant

23
Q

What is the function of the epidermal tissues?

A

To protect the internal cell tissues

24
Q

What is the function of the palisade mesophyll layer?

A

To absorb light

25
Q

What is the function of the spongy mesophyll layer?

A

To increase surface area

26
Q

What is the function of the xylem?

A

To transport fluids from the roots to the leaves

27
Q

What is the function of the phloem?

A

To transport food from the leaves to the rest of the plant

28
Q

What is the function of the guard cells?

A

To open and close depending on the conditions

29
Q

What is the function of the stomata?

A

To help the exchange of gases

30
Q

How is the epidermal tissues adapted to suit its function?

A

Epidermis are thin and transparent

31
Q

How is the palisade mesophyll layer adapted to suit its function?

A

Has lots of chloroplasts

32
Q

How is the spongy mesophyll layer adapted to suit its function?

A

Has a spongy layer

33
Q

How is the xylem adapted to suit its function?

A

Is waterproof and water can travel easily through it

34
Q

How is the phloem adapted to suit its function?

A

Has few organelles

35
Q

How is the guard cells adapted to suit its function?

A

Has an opening that opens and closes

36
Q

How is the stomata adapted to suit its function?

A

Has large air spaces

37
Q

What are the symptoms of the tobacco mosaic virus?

A

Mosaic pattern on the leaves

Stunted growth

38
Q

How do you reduce the spread of tobacco mosaic?

A

Isolate infected plants

39
Q

What are the symptoms of black spot?

A

Black or purple spots
Leaves drop
Reduced photosynthesis

40
Q

How do your reduce the spread of black spot?

A

Fungicides

Remove infected leaves

41
Q

What are the symptoms of aphids?

A

Wilted leaves
Sap leaks out
Mould

42
Q

How do you reduce the spread of aphids?

A

Spray dormant oil to kill the eggs

43
Q

What is nitrate needed for?

A

For making amino acids

44
Q

What will the plant suffer from if it doesn’t have enough nitrate?

A

Stunted growth

45
Q

What is magnesium needed for?

A

For making chlorophyll

46
Q

What will the plant suffer from if it doesn’t have enough magnesium?

A

Leaves turn yellow

47
Q

What is translocation?

A

The movement of sugars through the plant

48
Q

What process does sugar/sap move by?

A

Translocation

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