Impact of Photosynthesis

Q.

Explain photosynthesis with a diagram? Write the balanced equation for photosynthesis. Where are the raw materials obtained from? [5 MARKS]

Q. Why is photosynthesis important?

1. It is the source of energy and food for all organisms.
2. It releases oxygen into the environment which is utilised by organisms.
3. It sustains all the food chains in an ecosystem
4. It releases carbon dioxide into the environment which is utilised by all organisms

Q.

What is the difference between carbohydrate and starch

Q.

Which of the following equations is the summary of photosynthesis?

1. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\mathrm{O}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

2. $6{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

3. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\mathrm{O}+\mathrm{Chlorophyll}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}$

4. $6{\mathrm{CO}}_2+12{\mathrm{H}}_2\mathrm{O}+\mathrm{Chlorophyll}+\mathrm{Sunlight}\to {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6+6{\mathrm{H}}_2\mathrm{O}$

Q.

Question 37
“All plants give out oxygen during day and carbon dioxide during the night”. Do you agree with this statement? Give reason.

Q.

Select the incorrectly matched pair with regard to the C4​ cycle?

1. Primary CO2​ fixation product - PGA

2. Site of initial carboxylation - Mesophyll cells

3. Primary CO2​ acceptor - PEP

4. C4​ plant - Maize

5. Location of enzyme RuBisCO - Bundle sheath cells

Q.

The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because:

(a) starch is the immediate product of photosynthesis.

(b) glucose formed in photosynthesis soon gets converted into starch.

(c) starch is soluble in water.

(d) sugar cannot be tested.

Q.

What is the role of companion cells?

Q.

As desert plants take co2 at night, then when they take in oxygen & perform respiration?Can photosynthesis & respiration be simultaneously going on?

Q.

What happens during the second stage of photosynthesis?

Q.

First product of photosynthesis.

1. Oxygen

2. Carbon Dioxide

3. Glucose

4. Water

Q.

A)mention the salient features of kingdom protista (point wise)

B)mention the salient features of kingdom fungi (point wise)

Q.

Can you make ATP without mitochondria?

Q. What is the importance of photosynthesis to living things other than plants?

Q.

Is oxygen a product of light reaction?

Q.

The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because

(a) starch is the immediate product of photosynthesis.

(b) glucose formed in photosynthesis soon gets converted into starch.

(c) starch is soluble in water.

(d) sugar cannot be tested.

Q. Select the correct order of reactions in glycolysis.
I. Conversion of 3 phosphoglyceraldehyde to 1, 3 bisphosphoglycerate.
II. Conversion of 3 phosphoglyceric acid to 2 phosphoglycerate.
III. Conversion of 1, 3-BPGA to 3 phosphoglyceric acid.
IV. Splitting of fructose 1, 6-bisphosphate into dihydroxy acetone phosphate and 3 phosphoglyceraldehyde.

1. IV, III, I, II
2. II, III, I, IV
3. IV, II, I, III
4. I, IV, III, II
5. IV, I, III, II

Q. How will you prove that chlorophyll is required for photosynthesis?

Q. Plants do not store carbohydrate as glucose but do so as starch because glucose

1. Attracts herbivores
2. Is unstable
3. Will change nucleic acids
4. Alters osmotic balance

Q.

Name the gas given out during photosynthesis.

Q. Name the diasaccharide found in milk.

Q. Why is photosynthesis important?

1. It releases carbon dioxide into the environment which is utilised by all organisms
2. It is the source of energy and food for all organisms.
3. It releases oxygen into the environment which is utilised by organisms.
4. It sustains all the food chains in an ecosystem

Q.

The carbohydrates synthesized in the leaves are transported through sieve tubes most commonly in the from of:

1. glucose

2. starch

3. sucrose

4. cellulose

Q.

Aquatic plants use ${\mathrm{CO}}_2$ dissolved water for:

1. breakdown of toxic materials

2. respiration

3. excretion

4. photosynthesis

Q.

Name the gaseous raw material essential for the production of starch in plants through photosynthesis.

1. Oxygen gas

2. Hydrogen gas

3. Carbon dioxide

4. Both oxygen and carbon dioxide.

Q. “All plants give out oxygen during day and carbon dioxide during the night”. Do you agree with this statement? Give reason.

Q. The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because

1. Starch is the immediate product of photosynthesis.
2. Glucose formed in photosynthesis soon gets converted into starch.
3. Starch is soluble in water.
4. Sugar cannot be tested.

Q.

What is/are used to convert ADP into energy-rich compound ATP by adding one inorganic phosphate?

1. Electrons

2. Protons

3. Neutrons

4. Enzymes

Q.

Plasmodium falciparum is a unicellular parasite which causes malignant malaria in human beings. It divides by multiple fission in which the prominent nucleus divides into many nuclei and each of which along with a part of cytoplasm forms a new individual. Based on the given information, predict the kingdom to which this parasite belongs.

1. Monera

2. Protista

3. Fungi

4. Animalia

Q. what is meant by anabolic reaction