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BIO F5 > 2.4 > Flashcards

2.4 Flashcards

1
Q

What is the main organ for photosynthesis in plants?

A

Leaves

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2
Q

True or False: Photosynthesis primarily occurs in the roots of plants.

A

False

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3
Q

Fill in the blank: The process of photosynthesis converts _____ energy into chemical energy.

A

light

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4
Q

What pigment is primarily responsible for capturing light energy in leaves?

A

Chlorophyll

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5
Q

Which part of the leaf contains the majority of chloroplasts?

A

Mesophyll

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6
Q

Multiple Choice: What gas do plants take in during photosynthesis? A) Oxygen B) Carbon Dioxide C) Nitrogen

A

B) Carbon Dioxide

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7
Q

What are the two main stages of photosynthesis?

A

Light-dependent reactions and light-independent reactions (Calvin cycle)

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8
Q

True or False: Stomata are openings on the leaf surface that allow gas exchange.

A

True

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9
Q

Short Answer: Name one factor that affects the rate of photosynthesis.

A

Light intensity, carbon dioxide concentration, or temperature

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10
Q

Fill in the blank: The chloroplasts in plant cells are the sites of _____ synthesis.

A

photosynthesis

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11
Q

What is the role of water in photosynthesis?

A

Water is used as a reactant in the light-dependent reactions.

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12
Q

Multiple Choice: Which of the following is a product of photosynthesis? A) Glucose B) Water C) Carbon Dioxide

A

A) Glucose

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13
Q

What is the overall chemical equation for photosynthesis?

A

6CO2 + 12H2O (light energy) → C6H12O6 + 6O2+6h20

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14
Q

True or False: All plants perform photosynthesis.

A

False (some plants are parasitic or carnivorous)

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15
Q

Short Answer: How do leaves adapt to maximize photosynthesis?

A

Leaves are broad and flat to capture more light, and they have a thin structure to facilitate gas exchange.

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16
Q

What is the function of guard cells in relation to photosynthesis?

A

Guard cells regulate the opening and closing of stomata.

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17
Q

Multiple Choice: Which light wavelength is most effective for photosynthesis? A) Green B) Blue C) Yellow

18
Q

True or False: Photosynthesis only occurs during the day.

A

False (some processes continue at night)

19
Q

Short Answer: What are thylakoids?

A

Thylakoids are membrane-bound structures within chloroplasts where the light-dependent reactions occur.

20
Q

Fill in the blank: The primary sugar produced during photosynthesis is _____ .

21
Q

What is the role of ATP in photosynthesis?

A

ATP provides energy for the light-independent reactions of photosynthesis.

22
Q

Multiple Choice: Which of the following is NOT a product of photosynthesis? A) Oxygen B) Glucose C) Nitrogen

A

C) Nitrogen

23
Q

True or False: The oxygen released during photosynthesis comes from carbon dioxide.

A

False (it comes from water)

24
Q

Short Answer: What is the significance of photosynthesis for life on Earth?

A

Photosynthesis produces oxygen and organic compounds that are essential for the survival of most life forms.

25
Q

Epidermis

A

Transparent waxy curticle= allow sunlight to penetrate into palisade mesophyll
Stomata= gaseous exchange with the presence of light

26
Q

Palisade mesophyll

A

Packed with chloroplast= enable sunlight to be absorb at a maximum rate

27
Q

Spongy mesophyll

A

Contain air spaces= allow efficient gaseous exchanged during photosynthesis

28
Q

Xylem

A

Transport water and mineral salts from root to the leaves

29
Q

Phloem

A

Transport glucose produde by photosynthesis from leaf to all parts of the plants

30
Q

Thylakoid

A

Disc-shaped contain chlorophyll=have photosynthetic pigment to trap sunlight

31
Q

Granum

A

A disc-shaped stack with thylakoid= increase the surface area for optimal photosynthesis

32
Q

stroma

A

Colorless fluid surrounding granum

33
Q

Lamellae

A

Thin membrane structure that connect granum to other granum.

34
Q

Light-Dependent Reaction

A

Requires Light
Takes place in the thylakoid membrane.
Uses light energy to excite electrons in chlorophyll.
Photolysis of water produces O₂, H⁺, and electrons.

35
Q

Light-Independent Reaction

A

Does NOT Require Light
Takes place in the stroma of the chloroplast.
Uses ATP and NADPH from the light-dependent reactions.

36
Q

Both light dependent and independent reaction

A

catalysed by enzyme
take place in chloroplast

37
Q

The higher the carbon dioxide concentration?

A

The higher the rate of photosynthesis

38
Q

The higher the light intensity without limiting factors?

A

The higher the rate of photosynthesis (max til noon)

39
Q

The higher the temperature?

A

Denatures the enzymes thus, photosynthesis is stopped

40
Q

which colour is the highest?

A

Red= absorbed by chlorophyll
Blue=absorb by carotenoid pigment before transfer to chlorophyll

BIO F5 (9 decks)

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