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Selina solutions for Class 10 Biology chapter 6 - Photosynthesis

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Selina Selina ICSE Concise Biology Class 10

Selina ICSE Concise Biology for Class 10 - Shaalaa.com

Chapter 6: Photosynthesis

Multiple choice typeVery short answer typeShort answer typeStructured/Application/Skill type

Selina solutions for Class 10 Biology Chapter 6 Exercise Multiple choice type [Page 78]

Multiple choice type | Q 1 | Page 78

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

  • starch is immediate product of photosynthesis

  • glucose formed in photosynthesis soon gets converted into starch

  • starch is soluble in water

  • sugar cannot be used

Multiple choice type | Q 2 | Page 78

The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is

  • six

  • twelve

  • eighteen

  • twenty-four

Multiple choice type | Q 3 | Page 78

The rate of photosynthesis is not affected by

  • light intensity

  • humidity

  • temperature

  • CO2 concentration

Multiple choice type | Q 4 | Page 78

Chlorophyll in a leaf is required for

  • breaking down water into hydrogen and oxygen

  • emitting green light

  • trapping light energy

  • storing starch in the leaves

Multiple choice type | Q 5 | Page 78

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

  • be killed instantly

  • grow more vigorously because more energy will be available

  • stop growing and die gradually of starvation

Multiple choice type | Q 6 | Page 78

Which one chemical reaction occurs during photosynthesis?

  • Carbon dioxide is reduced and water is oxidised

  • Water is reduced and carbon dioxide is oxidised

  • Both carbon dioxide and water are oxidised

  • Both carbon dioxide and water are reduced

Multiple choice type | Q 7 | Page 78

The specific function of light energy in the process of photosynthesis is to

  • reduce carbon dioxide

  • synthesise glucose

  • activate chlorophyll

  • split water molecule

Multiple choice type | Q 8 | Page 78

A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to

  • remove chlorophyll from leaves

  • remove starch from the leaves

  • ensure that no photosynthesis occurred

  • ensure that the leaves are free from starch

Multiple choice type | Q 9 | Page 78

During photosynthesis, the oxygen in glucose comes from

  • CO2

  • water

  • both CO2 and water

  • oxygen via air

Selina solutions for Class 10 Biology Chapter 6 Exercise Very short answer type [Page 79]

Very short answer type | Q 1.1 | Page 79

Name the following:

The category of organisms that prepare their own food from basic raw materials.

Very short answer type | Q 1.2 | Page 79

Name the following:

The kind of plastids found in the mesophyll cells of the leaf.

Very short answer type | Q 1.3 | Page 79

Name the following:

The compound which stores energy in the cells.

Very short answer type | Q 1.4 | Page 79

Name the following:

The first form of food substance produced during photosynthesis. 

Very short answer type | Q 1.5 | Page 79

Name the following:

The organisms that can be called "natural purifiers" of the air.

Very short answer type | Q 1.6 | Page 79

Name the following:

The source of carbon dioxide for aquatic plants. 

Very short answer type | Q 1.7 | Page 79

Name the following:

The part of chloroplast where the dark reaction of photosynthesis takes place.

Very short answer type | Q 1.8 | Page 79

Name the following:

The tissue that transports manufactured type of starch from leaves to all parts of the plants.

Selina solutions for Class 10 Biology Chapter 6 Exercise Short answer type [Pages 79 - 80]

Short answer type | Q 1.1 | Page 79

Mention one difference between the following on the basis of what is given in bracket.

Respiration and photosynthesis (gas released)

Short answer type | Q 1.2 | Page 79

Mention one difference between the following on the basis of what is given in bracket.

Light and dark reactions (products formed)

Short answer type | Q 1.3 | Page 79

Mention one difference between the following on the basis of what is given in bracket.

Producers and consumers (mode of nutrition)

Short answer type | Q 1.4 | Page 79

Mention one difference between the following on the basis of what is given in bracket.

Grass and grasshopper (mode of nutrition)

Short answer type | Q 1.5 | Page 79

Mention one difference between the following on the basis of what is given in bracket.

Chlorophyll and chloroplast (part of plant cell)

Short answer type | Q 2.01 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Dark reaction of photosynthesis occurs during night time.

  • True

  • False

Short answer type | Q 2.02 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Immediate product of photosynthesis is glucose.

  • True

  • False

Short answer type | Q 2.03 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant.

  • True

  • False

Short answer type | Q 2.04 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Photosynthesis requires enzymes.

  • True

  • False

Short answer type | Q 2.05 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Green plants are consumers.

  • True

  • False

Short answer type | Q 2.06 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Photosynthesis results in loss of dry weight of the plants.

  • True

  • False

Short answer type | Q 2.07 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Photosynthesis stops at a temperature of about 35oC.

  • True

  • False

Short answer type | Q 2.08 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Photosynthesis occurs only in cells containing chloroplasts.

  • True

  • False

Short answer type | Q 2.09 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Green plants perform photosynthesis.

  • True

  • False

Short answer type | Q 2.1 | Page 79

Identify the false statements and rewrite them correctly by changing the first or last word only.

Algae are autotrophs.

  • True

  • False

Short answer type | Q 3.1 | Page 79

Fill in the blank with the appropriate answer from the choices given in the brackets.

The site of light reaction in the cells of a leaf is ............ 

  • cytoplasm

  • stroma

  • grana

Short answer type | Q 3.2 | Page 79

Fill in the blank with the appropriate answer from the choices given in the brackets.

The chemical substance used to test the presence of starch in the cell of a leaf is .............

  • CaCl2

  • iodine solution

  • Benedict solution

Short answer type | Q 3.3 | Page 79

Fill in the blank with the appropriate answer from the choices given in the brackets.

Stroma is ground substance in ................ 

  • cytoplasm

  • chloroplast

  • ribosomes

Short answer type | Q 3.4 | Page 79

Fill in the blanks with the appropriate answer from the choices given in the brackets.

The dark reaction of photosynthesis is known as .............. 

  • Hill reaction

  • cyclic phosphorylation

  • Calvin cycle

Short answer type | Q 3.5 | Page 79

Fill in the blanks with the appropriate answer from the choices given in the brackets.

In the flowering plants, food is transported in the form of ..................

  • sucrose

  • glucose

  • starch

Short answer type | Q 4.1 | Page 79

Are the following statement true or false? Give reason in support of your answer.

The rate of photosynthesis continues to rise as long as the intensity of light rises.

  • True

  • False 

Short answer type | Q 4.2 | Page 79

Are the following statement true or false? Give reason in support of your answer.

The outside atmospheric temperature has no effect on the rate of photosynthesis.

  • True

  • False

Short answer type | Q 4.3 | Page 79

Are the following statement true or false? Give reason in support of your answer.

If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesise in bright sunshine.

  • True

  • False

Short answer type | Q 4.4 | Page 79

Are the following statement true or false? Give reason in support of your answer.

Destarching of the leaves of a potted plant can occur only at night.

  • True

  • False

Short answer type | Q 4.5 | Page 79

Are the following statement true or false? Give reason in support of your answer.

The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.

  • True

  • False

Short answer type | Q 4.6 | Page 79

Are the following statement true or false? Give reason in support of your answer.

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.

  • True

  • False

Short answer type | Q 4.7 | Page 79

Are the following statement true or false? Give reason in support of your answer.

Photosynthesis is considered as a process supporting all life on earth.

  • True

  • False

Short answer type | Q 5 | Page 79

Given below are five terms. Rewrite the terms in the correct order so as to be in logical sequence with regard to photosynthesis: (i) water molecules, (ii) oxygen, (iii) grana, (iv) hydrogen and hydroxyl ions, (v) photons.

Short answer type | Q 6 | Page 79

State any four differences between photosynthesis and respiration.

Short answer type | Q 7 | Page 79

"Oxygen is a waste product of photosynthesis." Comment.

Short answer type | Q 8 | Page 79

Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? Explain.

Short answer type | Q 9 | Page 79

Why is it not possible to demonstrate respiration in a green plant kept in sunlight?

Short answer type | Q 10 | Page 79

Most leaves have the upper surface more green and shiny than the lower one. Why?

Short answer type | Q 11 | Page 79

How would you demonstrate that green plants release oxygen when exposed to light?

Short answer type | Q 12.1 | Page 79

Describe the main chemical changes which occur during photosynthesis in:

Light reaction

Short answer type | Q 12.2 | Page 79

Describe the main chemical changes which occur during photosynthesis in:

Dark reaction

Short answer type | Q 13.1 | Page 80

Complete the following food chains by writing the names of appropriate organisms in the blanks:

Grass → ............ Snake → ...............

Short answer type | Q 13.2 | Page 80

Complete the following food chains by writing the names of appropriate organisms in the blanks:

 ........... → Mouse  ............... → Peacock

Short answer type | Q 14 | Page 80

How do non-green plants such as fungi and bacteria obtain their nourishment?

Short answer type | Q 15 | Page 80

All life owes its existence to chlorophyll. Give reason.

Short answer type | Q 16 | Page 80

Complete the following by filling the blanks 1 to 5 with appropriate words/ terms/ phrases:

To test the leaf for starch, the leaf is boiled in water to …………… (1). It is next boiled in methylated spirit to ……………(2). The leaf is placed in warm water to soften it. It is then placed in a dish and ………….(3) solution in added. The region, which contains starch, turns ……………. (4) and the region, which dose not contain starch, turns ………………(5)

Selina solutions for Class 10 Biology Chapter 6 Exercise Structured/Application/Skill type [Pages 80 - 81]

Structured/Application/Skill type | Q 1.1 | Page 80

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

What aspect of photosynthesis was being investigated?

Structured/Application/Skill type | Q 1.2 | Page 80

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

Is there any control in this experiment? If so, state it.

Structured/Application/Skill type | Q 1.3 | Page 80

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

Why was the plant kept in the dark before the experiment?

Structured/Application/Skill type | Q 1.4 | Page 80

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?

Structured/Application/Skill type | Q 2.1 | Page 80

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 Guard cells.

Structured/Application/Skill type | Q 2.2 | Page 80

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 Cuticle.

Structured/Application/Skill type | Q 2.3 | Page 80

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

Structured/Application/Skill type | Q 2.4 | Page 80

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 Xylem tissue in the leaf veins

Structured/Application/Skill type | Q 2.5 | Page 80

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 Phloem tissue in the leaf veins.

Structured/Application/Skill type | Q 2.6 | Page 80

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.

Structured/Application/Skill type | Q 3 | Page 80

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?

Structured/Application/Skill type | Q 4.1 | Page 80

Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.

Name the phenomenon represented.

Structured/Application/Skill type | Q 4.2 | Page 80

Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.

Name any one organism that could be shown at No .5

Structured/Application/Skill type | Q 4.3 | Page 80

Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.

Name the biological process which was the starting point of the whole chain.

Structured/Application/Skill type | Q 4.4 | Page 80

Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.

Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.

Structured/Application/Skill type | Q 5 | Page 80

Enumerate the steps involved in testing a green leaf for the presence of starch.

Structured/Application/Skill type | Q 6.1 | Page 80

Given alongside is the diagram of an experimental set-up:

What is the objective of this experiment?

Structured/Application/Skill type | Q 6.2 | Page 80

Given alongside is the diagram of an experimental set-up:

Will it work satisfactorily? Given reason.

Structured/Application/Skill type | Q 6.3 | Page 80

Given alongside is the diagram of an experimental set-up:

What alteration (s) will you make in it for obtaining expected result?

Structured/Application/Skill type | Q 6.4 | Page 80

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.

Structured/Application/Skill type | Q 7 | Page 81

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.

Structured/Application/Skill type | Q 8.1 | Page 81

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.

What aspect of photosynthesis was being tested?

Structured/Application/Skill type | Q 8.2 | Page 81

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.

Why was the plant placed in the dark before beginning the experiment?

Structured/Application/Skill type | Q 8.3 | Page 81

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

Structured/Application/Skill type | Q 8.4 | Page 81

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. 

Structured/Application/Skill type | Q 8.5 | Page 81

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. 

Structured/Application/Skill type | Q 9 | Page 81

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.

Chapter 6: Photosynthesis

Multiple choice typeVery short answer typeShort answer typeStructured/Application/Skill type

Selina Selina ICSE Concise Biology Class 10

Selina ICSE Concise Biology for Class 10 - Shaalaa.com

Selina solutions for Class 10 Biology chapter 6 - Photosynthesis

Selina solutions for Class 10 Biology chapter 6 (Photosynthesis) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Selina ICSE Concise Biology for Class 10 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10 Biology chapter 6 Photosynthesis are Concept of Photosynthesis, Experiments - Show the Necessity of Light, Carbon Dioxide and Chlorophyll, Emphasis on Destarching and the Steps Involved in Starch Test., Carbon Cycle, The Internal Structure of Chloroplast, Opening and Closing of Stomata Based on Potassium Ion Exchange Theory., Overall Balanced Chemical Equation to Represent Photosynthesis., Introduction of the Terms "Photochemical" for Light Phase, "Biosynthetic" for Dark Phases., Light Reaction, Dark Reaction, Experiments with Regard to the Factors Essential for Photosynthesis.

Using Selina Class 10 solutions Photosynthesis exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 6 Photosynthesis Class 10 extra questions for Biology and can use Shaalaa.com to keep it handy for your exam preparation

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