Biologi Bab 2 T5

The following information describes the features of the external structure of green leaves. Identify the part of the leaf.

• - Thin and flat shaped

• - Green part of the leaf

• 1. Petiole

• 1. Cuticle

• 1. Lamina

• 1. Veins

Diagram 1 shows a cross section of eudicot leaves. What is K?

• Palisade Mesophyll Cell

• Spongy Mesophyll Cell

• Xylem

• Phloem

Which substances are involved in the opening and closing of the stomata?

I  Potassium ion

1. II  Sucrose

III Glucose

IV Sodium Ion

• I and II

• II and III

• III and IV

• I and IV

Diagram 2 shows a component of plant cells. Among parts A, B, C and D, which has a lot of chlorophyll?

• A

• B

• C

• D

Diagram 3 shows the chemical equations that represent the overall reaction of photosynthesis. Identify R, S and T.

• R: 6O2
  S: C3H6O3

  T: 6CO2

• R: 6O2
  S: C6H12O6

  T: 6CO2

• R: 6CO2
  S: C6H12O6

  T: 6O2

• R: 6CO2
  S: C3H6O3

  T: 6O2

Diagram 4 shows a structure of chloroplast. Which of the following describes the process that takes place in X?

1. I  light-independent reaction

2. II  light-dependent reactions

3. III  involve photolysis of water

   IV  involve reduction of carbon dioxide

• I and II

• II and III

• III and IV

• I and IV

Diagram 5 shows an experiment to study the factors that affect the rate of photosynthesis. Which of the following can increase the number of air bubbles that are released?

• 1. 0.05% sodium hydrogen carbonate solution and yellow light bulb

• 1. 0.3% sodium hydrogen carbonate solution and yellow light bulb

• 1. 0.05% sodium hydrogen carbonate solution and blue light bulb

• 1. 0.3% sodium hydrogen carbonate solution and blue light bulb

8. Diagram 6 shows a graph of the relationship between the absorption and production of carbon dioxide with light intensity. At what point does the rate of photosynthesis equal with the rate of respiration?

• A

• B

• C

• D

8. Which of the following is true about photosynthesis and respiration.

• 1. Photosynthesis involves a catabolic reaction while respiration involves an anabolism reaction.

• 1. Photosynthesis occurs in plant cells while respiration occurs in animal cells.

• 1. Photosynthesis requires light while respiration does not require light

• 1. Photosynthesis involves the breakdown of glucose while respiration involves the synthesis of glucose

Which of the following describes the advantages of greenhouses in the cultivation of medium temperature plants in lowland areas in Malaysia?

1. I operating costs are reduced

2. II  a lot of pollinating agents

3. III  harvest throughout the year

4. IV  changes in the temperature of the external environment do not affect the crop

• I and II

• II and III

• III and IV

• I and IV