During photosynthesis, the oxygen in glucose comes from $.......$
- ✓$CO_2$
- Bwater
- Cboth $CO_2$ and water
- Doxygen via air
Answer: A.
View full solution →Question types
Photosynthesis question types
213 questions across 9 question groups — pick any mix to generate a Biology paper with step-by-step answer keys.
213
Questions
9
Question groups
5
Question types
01
MCQ
46 Q→02Fill in the blanks.
23 Q→03[1 Mark Question Answer]
57 Q→04[2 Mark Question Answer]
10 Q→05Match the following.
3 Q→06[3 marks Question Answer]
14 Q→07[5 Mark Question Answer]
4 Q→08TRUE / FALSE
38 Q→09Do as Directed.
18 Q→Sample Questions
Photosynthesis questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A plant is kept in a dark cupboard for $48$ hours before conducting any experiment on photosynthesis in order to $.......$
- Aremove chlorophyll from leaves
- Bremove starch from the leaves
- Censure that no photosynthesis occurred
- ✓ensure that the leaves are free from starch
Answer: D.
View full solution →The specific function of light energy in the process of photosynthesis is to $.......$
- Areduce carbon dioxide
- Bsynthesise glucose
- ✓activate chlorophyll
- Dsplit water molecule
Answer: C.
View full solution →Which one chemical reaction occurs during photosynthesis?
- ✓Carbon dioxide is reduced and water is oxidised
- BWater is reduced and carbon dioxide is oxidised
- CBoth carbon dioxide and water are oxidised
- DBoth carbon dioxide and water are reduced
Answer: A.
View full solution →If the rate of respiration becomes more than the rate of photosynthesis, plants will $.......$
- ✓continue to live, but will not be able to store food
- Bbe killed instantly
- Cgrow more vigorously because more energy will be available
- Dstop growing and die gradually of starvation
Answer: A.
View full solution →In the flowering plants, food is transported in the form of ________ . (sucrose, glucose, starch)
The dark reaction of photosynthesis is known as ________ . (Hill reaction, cyclic phosphorylation, Calvin cycle)
Stroma is ground substance in ________ . (cytoplasm, chloroplast, ribosomes)
The chemical substance used to test the presence of starch in the cell of a leaf is ________ . ($CaCl^2, iodine solution, Benedict solution$)
View full solution →The site of light reaction in the cells of a leaf is ________ . (cytoplasm, stroma, grana)
Name the following:
The tissue that transports manufactured type of starch from leaves to all parts of the plants.
The tissue that transports manufactured type of starch from leaves to all parts of the plants.
Name the following:
The part of chloroplast where the dark reaction of photosynthesis takes place.
The part of chloroplast where the dark reaction of photosynthesis takes place.
Name the following:
The source of carbon dioxide for aquatic plants.
The source of carbon dioxide for aquatic plants.
Name the following:
The organisms that can be called "natural purifiers" of the air.
The organisms that can be called "natural purifiers" of the air.
Name the following:
The first form of food substance produced during photosynthesis.
The first form of food substance produced during photosynthesis.
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
Write a balanced chemical equation to represent the process of photosynthesis.
Write a balanced chemical equation to represent the process of photosynthesis.
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Stomata.
Explain briefly the role of the following structures in this process is Stomata.
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Mesophyll cells
Explain briefly the role of the following structures in this process is Mesophyll cells
Why is it not possible to demonstrate respiration in a green plant kept in sunlight?
| Column I | Column II |
| (i) Chloroplasts | (a) Raw materials |
| (ii) Oxygen and Hydrogen | (b) Raw materials |
| (iii) Carbon dioxide and water | (c) Photolysis |
| (iv) Cells in the leaf | (d) Light reaction |
| (e) Glucose + oxygen |
| Column I | Column II |
| (i) Grana | (a) Producers |
| (ii) Autotrophs | (b) Decomposers |
| (iii) By-products of photosynthesis | (c) Work rooms |
| (iv) Bacteria and fungi | (d) Glucose + oxygen |
| (e) Light reaction |
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
Draw a neat diagram of a chloroplast and label its parts.
Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus.
Given alongside is the diagram of an experimental set-up:
Would you take any step before starting the experiment? Describe this step and explain its necessity.
Would you take any step before starting the experiment? Describe this step and explain its necessity.
Enumerate the steps involved in testing a green leaf for the presence of starch.
Given below is a schematic diagram to illustrate some aspects of photosynthesis.
a.Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items.
b.What phenomenon do the thick arrows A and B indicate?
a.Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items.
b.What phenomenon do the thick arrows A and B indicate?
The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both test-tubes are kept in sunlight. Answer the questions that follow:
(a) Name the physiological process that releases the bubbles of oxygen.
(b) Explain the physiological process as mentioned above in (a).
(c) What is the purpose of keeping a snail in test-tube B?
(d) Why does test-tube B have more bubbles of oxygen?
(e) Give an example of a water plant that can be used in the above experiment.
(f) Write the overall chemical equation for the above process.
(a) Name the physiological process that releases the bubbles of oxygen.
(b) Explain the physiological process as mentioned above in (a).
(c) What is the purpose of keeping a snail in test-tube B?
(d) Why does test-tube B have more bubbles of oxygen?
(e) Give an example of a water plant that can be used in the above experiment.
(f) Write the overall chemical equation for the above process.
Describe the main chemical changes which occur during photosynthesis in:
Dark reaction
Dark reaction
Describe the main chemical changes which occur during photosynthesis in:
Light reaction
Light reaction
How would you demonstrate that green plants release oxygen when exposed to light?
Photosynthesis is considered as a process supporting all life on earth.
If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will fail to occur.
The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.
Destarching of the leaves of a potted plant can occur only at night.
If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesise in bright sunshine.
Arrange and Rewrite :
Snake, Rabbit, Cabbage, Hawk.
Snake, Rabbit, Cabbage, Hawk.
Choose the Odd One Out :
Light intensity, Water content, Temperature, Chlorophyll.
Light intensity, Water content, Temperature, Chlorophyll.
Choose the Odd One Out :
Glucose, Water, Oxygen, Carbon dioxide.
Glucose, Water, Oxygen, Carbon dioxide.
Choose the Odd One Out :
Grana, Thylakoid, Stroma, Root.
Grana, Thylakoid, Stroma, Root.
Arrange and Rewrite :
Carbon fixation, Glucose formation, Conversion of light energy into chemical energy, Absorption of light by chlorophyll, ATP, and NADPH usage
Carbon fixation, Glucose formation, Conversion of light energy into chemical energy, Absorption of light by chlorophyll, ATP, and NADPH usage
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