Biochemical Interactions in Plants and Animals

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What is photosynthesis?

The process by which green plants use sunlight to synthesize foods from carbon dioxide and water.

What is the word equation for photosynthesis?

Carbon dioxide + water + sunlight → glucose + oxygen.

What role does chlorophyll play in photosynthesis?

Chlorophyll captures sunlight to drive photosynthesis.

What is respiration in biology?

The process of exchanging gases, like oxygen and carbon dioxide, in living organisms.

What is aerobic respiration?

The chemical process where cells use oxygen to break down nutrient molecules to release energy.

Name the products of aerobic respiration.

Carbon dioxide, water, and energy.

What is anaerobic respiration?

Respiration without using oxygen, resulting in the partial breakdown of glucose.

What does anaerobic respiration produce in animals?

Lactic acid.

What are autotrophs?

Organisms that synthesize their own food through photosynthesis.

What are heterotrophs?

Organisms that rely on others for energy and cannot make their own food.

What is the role of stomata in plants?

Stomata allow gas exchange and water vapor release.

How does light intensity affect photosynthesis?

Increased light intensity raises photosynthesis rates until a saturation point.

What is the byproduct of photosynthesis?

Oxygen.

Why is transpiration important for plants?

It helps in water and nutrient transport and cooling the plant.

What is the main function of guard cells?

To control the opening and closing of stomata.





Test Your Knowledge

Select the correct option


1. What is photosynthesis?

The process of respiration in humans.

The process by which green plants use sunlight to synthesize foods from carbon dioxide and water.

The decomposition process of organic matter.

A chemical reaction that occurs only in animals.

2. What is the word equation for photosynthesis?

Oxygen + glucose → carbon dioxide + water + energy.

Water + carbon dioxide + energy → oxygen + glucose.

Carbon dioxide + water + sunlight → glucose + oxygen.

Carbon dioxide + water → oxygen + glucose + sunlight.

3. What role does chlorophyll play in photosynthesis?

Chlorophyll captures sunlight to drive photosynthesis.

Chlorophyll stores energy during photosynthesis.

Chlorophyll is broken down to produce glucose.

Chlorophyll transports water in plants.

4. What is respiration in biology?

Movement of substances in plant leaves.

The process of exchanging gases, like oxygen and carbon dioxide, in living organisms.

Conversion of nutrients into proteins.

The synthesis of oxygen from carbon dioxide and water.

5. What is aerobic respiration?

Breaking down molecules without oxygen.

A process that converts glucose into fats.

The chemical process where cells use oxygen to break down nutrient molecules to release energy.

A process that produces lactic acid.

6. Name the products of aerobic respiration.

Carbon dioxide, water, and energy.

Oxygen, glucose, and energy.

Carbon dioxide, nitrogen, and energy.

Water, lactic acid, and energy.

7. What is anaerobic respiration?

The synthesis of energy using sunlight.

Respiration using high levels of oxygen.

Respiration in which carbon dioxide is completely utilized.

Respiration without using oxygen, resulting in the partial breakdown of glucose.

8. What does anaerobic respiration produce in animals?

Alcohol.

Oxygen.

Carbon dioxide.

Lactic acid.

9. What are autotrophs?

Animals that consume other organisms for food.

Organisms that synthesize their own food through photosynthesis.

Bacteria that decompose organic matter.

Fungi that depend on dead matter for energy.

10. What are heterotrophs?

Organisms that rely on others for energy and cannot make their own food.

Organisms that produce their own food via photosynthesis.

Bacteria that only consume carbon dioxide.

Plants that produce energy through sunlight.

11. What is the role of stomata in plants?

To absorb minerals from the soil.

Stomata allow gas exchange and water vapor release.

To secure plant roots to the soil.

To produce pollen during pollination.

12. How does light intensity affect photosynthesis?

It reduces the efficiency of photosynthesis.

It has no effect on photosynthesis.

Decreased light results in higher oxygen production.

Increased light intensity raises photosynthesis rates until a saturation point.

13. What is the byproduct of photosynthesis?

Carbon dioxide.

Glucose.

Oxygen.

Water.

14. Why is transpiration important for plants?

It helps in water and nutrient transport and cooling the plant.

It allows for photosynthesis to occur.

It increases glucose production.

It enhances nutrient absorption from the soil.

15. What is the main function of guard cells?

To produce chlorophyll.

To convert glucose into energy.

To control the opening and closing of stomata.

To protect plant roots.