Autotrophic Nutrition

Q.

Differentiate between an autotroph and a heterotroph.

Q.

What are the necessary conditions for autotrophic nutrition and what are its by-products?

Q.

Give the dental formula of human beings.

Q.

Which of the following statements about the autotrophs is incorrect?

1. They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll

2. They store carbohydrates in the form of starch

3. They convert carbon dioxide and water into carbohydrates in the absence of sunlight

4. They constitute the first trophic level in food chains

Q. Which of the following events does not occur exclusively during light reaction of photosynthesis?

1. Photolysis of water
2. Conversion of light energy into chemical energy
3. Absorption of solar energy
4. Reduction of carbon dioxide

Q.

(a) What are autotrophs ? Give one example of autotrophs.
(b)What are the conditions necessary for autotrophic nutrition ?

Q.

What is mixotrophic nutrition?

Q.

Plants prepare there own food, so they are called _____.

Q. Dark reaction occurs in……

1. Grana
2. Stroma
3. Cytoplasm
4. Lumen

Q.

Dental formula of adolescent human being before seventeen-year :

1. 2122/2122

2. 2123/2123

3. 2102/2102

4. 1023/2023

Q.

Question 1
Which of the following statements about the autotrophs is incorrect?

(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.
(b) They store carbohydrates in the form of starch.
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight.
(d) They constitute the first trophic level in food chains.

Q.

A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?

Q. Dark reactions of photosynthesis are actually not totally independent of light as:

1. The initial reactions occur in the presence of light
2. The reaction will be inhibited by the presence of light
3. They can occur during the day as well
4. They utilize the products of the light reaction

Q.

Question 3
Select the correct statement.

(a) Heterotrophs do not synthesise their own food.
(b) Heterotrophs utilise solar energy for photosynthesis.
(c) Heterotrophs synthesise their own food.
(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates.

Q.

Question 42
Differentiate between an autotroph and a heterotroph.

Q. List three events that occur during photosynthesis process.

Q.

Question 7
What are the necessary conditions for autotrophic nutrition and what are its by-products?

Q.

Which of the following is an autotroph? Green plant or Man

Q.

Difference between autotrophic and heterotrophic nutrition

Q.

Question 3
The autotrophic mode of nutrition in plants requires:

(a) Carbon dioxide and water
(b) Chlorophyll
(c) Sunlight
(d) All of the above

Q. Which of the following statements is not true about stomata?

1. Opening and closing of stomata is a function of guard cell which undergo rapid turgor changes
2. Guard cells are the only epidermal cells having chloroplast
3. Outer and lateral walls of the guard cells associated with stomata are comparatively thicker than the inner wall
4. Stomata are specialised for gaseous exchange across the surface of the leaves

Q. What is the difference between holozoic nutrition and heterotrophic nutrition

Q.

Name the following :
(a) The process in plants which converts light energy.
(b) Organisms that cannot prepare their own food.
(c) Organisms that can prepare their own food.
(d) The cell organelle where photosynthesis occurs.
(e) The cells which surround a stomatal pore.
(f) An enzyme secreted by gastric glands in stomach which acts on proteins.

Q.

Give one word answers for each of the following.
I) Green colored pigment in plants.
II) The process of taking food and its utilization by the body.
III) The process by which green plants prepare their food.
IV) Leaves with white and green patches.

1. I- xanthophylls, II- Digestion, III- photolysis, IV- multicolored

2. I- chloroplast, II- Digestion, III- transpiration, IV- Blue black

3. I- stomata, II- Excretion, III- photolysis, IV- yellow brown

4. I- chlorophyll, II- nutrition, III- photosynthesis, IV- variegated

Q. Which of the following organisms have the same mode of nutrition as the animals including humans?

1. Plants
2. Fungi
3. Paramoecium
4. Cuscuta

Q. What are the necessary conditions for autotrophic nutrition and what are its by-products?

Q. (a) What are autotrophs? Give one example of autotrophs.
(b) What are the conditions necessary for autotrophic nutrition?

Q. A dialysis machine contains long tubes coiled in a tank containing dialysing solution:

(ii) What does the dialysing solution contain?

Q.

Which of the following correctly represents the normal adult human dental formula?

1. $\frac{3131}{3121}$

2. $\frac{2133}{2123}$

3. $\frac{2123}{2123}$

4. $\frac{3133}{3133}$

Q.

What Is Anoxygenic Photosynthesis?