10 class Biology important questions for public examination march 2026

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10th  BIOLOGY - VERY IMPORTANT QUESTIONS

By Singamsetty Maruthi Venkata Kondal Rao

(BASED ON APSCERT and DGE MODEL PAPERS)

 

8 mark questions for 16th  Question (Experiments)

 

Very Important Questions

1.      How do you test the presence of starch in leaf?

2.      Write an experiment to show that chlorophyll is necessary for photosynthesis.

3.      Explain the lab activity to prove that carbon dioxide is necessary for photosynthesis

4.      Conduct an experiment that light is necessary for photosynthesis ?

5.      How do you demonstrate that the amount of carbon dioxide is more in air that we breathe out than we breathe in ?

 

Other Important Questions

6.      Write the procedure followed by you observe budding in Yeast. (Explain an activity to observe asexual reproduction in Yeast.)

7.      Write the experimental procedure that you follow in your lab to prove the action of saliva on starch.

8.      How do you prove phototropism in plants? (or) Describe the procedure you followed to prove that plants show growth towards light ?

 

8 mark questions for 17th  Question

 

Very Important Questions

1.      Male is responsible for sex determination of the baby - do you agree? If so write your answer with flow chart

 (or)"The father is responsible for determining the sex of the baby, not the mother"- How would you analyse this statement?

2.      How do Mendel's experiments show that traits may dominant or recessive? (Monohybrid cross)

3.       Analyse the dihybrid cross with the help of a checker board.(How do Mendel's experiments show that traits are inherited independently?)

 

Other Important Questions

4.      Compare the alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

5.      Compare and contrast nervous and hormonal mechanisms for control and coordination in animals

6.      How do you distinguish / differentiate between Arteries from veins ?

Most Important - 4 Mark Questions

1)      What questions will you ask about Diabetes to a doctor?

What questions would you pose, if you get a chance to meet a cardiologist ?

2)      Give some suggestions to control high blood pressure and maintain a healthy heart.

3)      Alveoli in lungs are designed for efficient gaseous exchange. How do you justify the statement ?

4)      How are the alveoli designed to maximise the exchange of gases.

5)      Compare the alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

6)      What is a role of Bile in our digestive system ? Name the enzyme present in ?

7)      What are the components of the transport system in human beings? What are the functions of these components?

8)      How do plants respond to stimuli. Justify the statement with suitable example

9)      Write a short note about contraceptive methods.

Diagrams (12th Question) (One diagram expecting from reproduction)

         Most important (One diagram expecting from reproduction)

1) Draw neat labelled diagram of longitudinal section of flower

2) Draw the neat labelled diagram of process of fertilization in a flower.

3) Draw the neat labelled diagram of female reproductive system ?

4) Draw a neat labelled diagram of the Male Reproductive System ?

Other important Diagrams

5) Draw the neat labelled diagram exerctory system

6) Draw the neat labelled diagram of structural and functional unit of exerctory system (NEPRHRON DIAGRAM)

7) Draw and label the diagram of structural and functional unit of nervous system (NERVE CELL OR NUERON)

OUR ENVIRONMENT (EXPECTING TWO 4 MARK QUESTONS)

EXPECTING - ONE 4 MARK QUESTION FROM WASTE DISPOSAL

1)      Write some safe disposal methods to maintain non-biodegradable generated in your house.

2)      How can you help in reducing the problem of waste disposal?

3)      Write some safe disposal methods to maintain non-biodegradable generated in your house.

4)      Suggest any 4 environmental friendly practices to reduce plastic waste

5)      People in your locality are throwing plastic bags into the nearby water streams. What environmental problems may arise? How will you create awareness?

6)      Write any 4 slogans on waste management ?

7)      How Can you help in reducing the problem of waste disposal? Give any two methods.

8)      Which is the better method in waste disposal – ‘burning’ or ‘composting’? Justify.

For 2nd important question from our environment for 4 marks

1)      What are trophic levels ? Give an example of food chain and state different trophic levels in it ?

2)      Why is damage to the ozone layer a cause for concern? What steps have to be taken to minimize this damage ?

3)      What happens if predators are removed from an ecosystem? How it influences the organisms in the other trophic levels?

Most Important - 2 Mark Questions

⭐ TOP MOST REPEATED (VERY IMPORTANT)

1.     What is a synapse? What happens at the synapse?

2.     What is a synapse? Write its importance.

3.     What will happen if there are no decomposers in an ecosystem?

4.     Define trophic level and mention different trophic levels in a food chain.

5.     What is the energy source in an ecosystem? Write the flow of energy.

6.     What is the role of HCl in the human digestive system?

7.     Write the functions of insulin and adrenalin.

 

⭐ FREQUENTLY ASKED (HIGH PROBABILITY)

8.     In which type of nutrition is photosynthesis seen? Name a plant showing parasitic nutrition.

9.     Explain the digestion of fats in human beings.

10.Name the digestive gland secretion that has no enzymes. Which enzymes act on proteins?

11.Why is the rate of breathing faster in aquatic organisms than terrestrial organisms?

12.Give two suggestions to control biomagnification.

13.What precautions will you take to maintain proper thyroxin levels in blood?

 

⭐ IMPORTANT HEALTH & ENVIRONMENT QUESTIONS

14.What precautions do you follow to escape from dental caries?

15.What precautions do you follow to protect yourself from diabetes?

16.Write precautions to limit ozone depletion.

 

⭐ REPRODUCTION & HEREDITY (EXAM FAVOURITES)

17.What is heredity?

18.Why is variation useful for the survival of species?

19.Which gland secretes estrogen? What is its role during puberty?

20.What is the need of taking iodine in food? Write consequences of iodine deficiency.

 

⭐ INFORMATION BASED

1.     Read the following table.

Type of nutrition

Examples

Autotrophic nutrition

Plants, Algae

Parasitic nutrition

Cuscuta, lice, leeches

Answer the following questions.

a) In which type of nutrition is photosynthesis is seen ?

• Autotrophic nutrition

b) Name the plant which shows parasitic nutrition ?

• Cuscuta

 

 2. Read the following table and answer the questions given.

S.No.

Digestive glands

Enzymes

Acts on

1

Salivary glands

Salivary amylase

Carbohydrates

2

Gastric glands

Pepsin

Proteins

3

Liver

No enzyme

Fats

4

Pancreas

Trypsin, Lipase

Proteins, Fats

 

a) Name the digestive gland seeretion, that has no enzymes.

• Bile

b) Which enzymes acts on proteins ?

• Pepsin

• Trypsin

 

3. Read the table and answer the questions.

S. No.

Hormone

Endocrine Gland

Function

1

Thyroxine

Thyroid gland

Regulates metabolism for body growth

2

Estrogen

Ovaries

Development of female sex organs; regulates menstrual cycle

 

A. Which gland secretions associated with the changes that occurs during puberty in females?

    • Ovaries secrete estrogen.
    • Estrogen causes physical and reproductive changes during puberty.

B. What is the function of the thyroxin hormone?

    • Thyroxine helps regulate metabolism.
    • It controls energy production and supports normal body growth.

MOST IMPORTANT 1-MARK QUESTIONS

 

1.     What is the instrument used to measure blood pressure?

2.     Name the enzyme present in saliva.

3.     Which digestive gland secretes bile?

4.     Which part of the brain helps in riding a bicycle?

5.     Which part of the brain controls balance and posture?

6.     Expand DNA.

7.      Identify the part 'X' labelled in the following diagram.

 


8.     What is the gap between two neurons called?

9.     Name the hormone responsible for phototropism in plants.

10.Name the hormone that controls blood sugar level.

 

11. Identify the type of asexual reproduction in the given picture.






 

12.Write one example for sexually transmitted diseases caused by bacteria.

 

13.



Identify the part labeled ‘A’ in the given diagram (Bud).

 

           14.What is the phenotypic ratio in a monohybrid cross?

15.Who proposed the laws of inheritance?

16.What is heredity?

17.How many chromosomes are present in human ovule?

           18.What is the full form of HIV?

19.Name the hormone secreted by thyroid gland.

20.Name two animals in which sex is not genetically determined.

           21.What is the primary source of energy in an ecosystem?

22.Name one decomposer.

23.What is the producer in a food chain?

            24.Write a slogan on organ donation.

25.Write a slogan to stop female foeticide.

26.Write a slogan on waste management.

27.Two species, A and B, live in the same environment. Species A shows a wide range of variations among its individuals. Species B has individuals with very similar traits. Which species is more likely to survive if the environment changes suddenly?

 

28.Male has 44+xy chromosomes and Female has 44+xx chromosomes. Assess the chromosomes present in the ovule.

 

29."Rate of breathing in aquatic organisms is much faster than that of in terrestrial organisms". support this statement.

 

        30.Identify the animal which show regeneration

    A) Yeast B) Hydra C) Amoeba D) Leishmania