Question

A. Answer the following:-

1. Why is glucose converted into starch immediately after its formation in the cells?
2. Too much bright light and high temperatureabove 45°C slow down photosynthesis. Why?

3. What is the role of carbon dioxide and water in the process of photosynthesis?

4. How do chlorophyll and sunlight affect photosynthesis?

5. Why are green plants called autotrophs?

6. What does 'photo' represents in term photosynthesis?

7. Name the raw materials needed for photosynthesis.

8. Write equation to represent the basics of photosynthesis.

9. Which form of energy is utilised by chlorophyll? In which form is this energy converted during photosynthesis and stored in glucose?​

Answer 1

Answer:

1. Glucose is soluble, thus it is converted to starch as it is insoluble so that it cannot escape from the cells. ... The stored starch (converting it into glucose) can be used later by the cells to release energy by respiration.
2. At these optimum temperatures, the limiting factor becomes the diffusion of carbon dioxide into the leaves. At high temperatures (20–40 C), the rate of photosynthesis decreases because the enzymes do not work as efficiently at this temperature.
3. During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. ... This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules
4. Chlorophyll's job in a plant is to absorb light—usually sunlight. ... The process of photosynthesis produces oxygen, which is released by the plant into the air. Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light.
5. Green plants are called autotrophs since they are able to synthesize their own food.
6. photo refers to light
7. Carbondioxide, water, light
8. 6CO2 + 6H2O → C6H12O6 + 6O2
9. photosynthesis contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars)..

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Answer 2

Answer:

1. Glucose is soluble, thus it is converted to starch as it is insoluble so that it cannot escape from the cells. Another reason for conversion is storage. The stored starch (converting it into glucose) can be used later by the cells to release energy by respiration.

2. At these optimum temperatures, the limiting factor becomes the diffusion of carbon dioxide into the leaves. At high temperatures (20–40 C), the rate of photosynthesis decreases because the enzymes do not work as efficiently at this temperature.

3. During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. ... This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules

4. Chlorophyll's job in a plant is to absorb light—usually sunlight. ... The process of photosynthesis produces oxygen, which is released by the plant into the air. Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light.

5. Green plants are called autotrophs since they are able to synthesize their own food. ... During photosynthesis, plants consume carbon dioxide and release oxygen gas. The green plants have chlorophyll in their leaves.

6. Plants absorb sunlight and turn that energy into food; the process is known as photosynthesis. This is a compound word made up of photo (which means "light") and synthesis (which means "to put together").

7. The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf.

8. The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

9. Photosynthesis is the process by which organisms that contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars).

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