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Biology Yr 10 revision > B9 > Flashcards

B9 Flashcards

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1
Q

What colour are the outside cells of a leaf?

A

Transparent

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2
Q

What are the Palisade and spongy mesophyll cells full of?

A

Chloroplasts

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3
Q

What do Chloroplasts contain?

A

Chlorophyll and other pigments that absorb light for photosynthesis.

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4
Q

What do stomata pores allow to pass into and out of the leaf?

A

Gases

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5
Q

What protects stomata?

A

Guard cells which open and close when needed.

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6
Q

What do plants need to photosynthesis?

A

Sunlight and Chlorphyll

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7
Q

What is the word equation for photosynthesis?

A

Carbon Dioxide + water = glucose + oxygen

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8
Q

What is the balanced symbol equation for photosynthesis?

A

6CO(2) +6H(2)O -> C(6)H(12)O(6) + 6O(2)

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9
Q

What does plants take up as food?

A

Nutrients from the soil.

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10
Q

What diffuses into and out of plants during photosynthesis and respiration?

A

Oxygen and Carbon dioxide.

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11
Q

What three conditions can increase the rate of photosynthesis?

A
  • More Carbon Dioxide
  • More light
  • Warmer temperatures
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12
Q

What is glucose used for?

A

respiration

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13
Q

What is starch used for?

A

used to store soluble sugars

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14
Q

What are amino acids used for?

A

Proteins for growth.

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15
Q

What are fats and oils used for?

A

energy storage in seeds

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16
Q

What colour does iodine turn in the presence of starch?

A

From Orange-red to Blue-Black

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17
Q

Is starch soluble?

A

No, it is insoluble.

18
Q

Does starch affect the water balance in plant cells?

A

no

19
Q

Is starch stored in cells found in a leaf?

A

yes

20
Q

Can iodine solution be used to detect the presence of starch?

A

yes

21
Q

Is most of the glucose made in photosynthesis converted to starch?

A

yes

22
Q

Do all plants store starch in tubers?

A

no

23
Q

What are the green parts of a leaf called and what do they contain?

A

Chloroplasts which contain chlorophyll.

24
Q

Why do plants have broad leaves?

A

Large surface area for absorption of light.

25
Q

Why do plants contain chlorophyll?

A

to absorb light energy

26
Q

Why do plants have air spaces?

A

To allow gas exchange.

27
Q

Why do plants have thin leaves?

A

Short diffusion distances for gases.

28
Q

Why do plants have veins?

A

To transport water and remove products of photosynthesis?

29
Q

What substances are needed for photosynthesis?

A

Chlorophyll, Light, Carbon dioxide and water.

30
Q

Does increasing room temperature always increase the rate of photosynthesis?

A

no

31
Q

Are photosynthetic enzymes denatured at low temperatures?

A

no

32
Q

What are the main limiting factors of of photosynthesis?

A

Temperature, Light intensity and carbon dioxide concentration.

33
Q

Are chlorophyll levels a limiting factor?

A

yes

34
Q

Does temperature affect all chemical reactions?

A

yes

35
Q

Is too much carbon dioxide toxic for plants?

A

no

36
Q

What are the products of photosynthesis?

A

glucose and oxygen

37
Q

To make proteins, plants need to combine glucose with which other substance?

A

nitrates

38
Q

What is meant by a hydroponic system?

A

Plants grow in water with a perfect balance of nutrients.

39
Q

Where do plants get the nutrients required to make their cell walls?

A

They make their own nutrients from raw materials.

40
Q

What adaption means that cells inside the leaf get a good supply of carbon dioxide?

A

Large air spaces in the leaf

41
Q

During the day, what is the movement of gasses into and out of the leaf?

A

Carbon dioxide moves into the leaf and oxygen moves out of the leaf.

42
Q

What is an endothermic reaction?

A

A reaction that require an input of energy from the environment.

Biology Yr 10 revision (11 decks)

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