CBSE Sample Paper for Class 11 Biology

CBSE Sample Paper for Class 11 Biology

Annual Examination

All questions are compulsory.

(Q.1 to Q. 11 are of 1 mark Questions)

1- Identify the Generic and specific names in the given scientific names – Felisleo, and Rosa Indica

2- What is herbarium?

3- Who gave five kingdom system of classification?

4- Give the function of chnomosomes and lysosome.

5- Name the nitrogenous base present in RNA only.

6- Name a platyhelminth which have high regeneration capacity.

7- Name the largest phylum of animal kingdom.

8- What should be the normal blood pressure of an adult person?

9- Name the gland from which insulin is released.

10- Name the vein in which oxygenated blood flows.

11- What is the main function of RBC?


(Q.12 to Q. 18 are of 2 marks Questions)

12- Draw a labelled diagram of bacteriophage virus.

13- Differentiate between prokaryotic and eukaryotic cells in four points.

14- What is ribosome composed of and what function theyperforme in the cell?

15- In which type of cells mitosis and meiosis division takes place.


Explain Cretinism and its cause.

16- In which type of cells mitosis and meiosis division take place.

17- What do you mean by coelomate and acoelomateanimals?


Which blood group is known as universal recipient and why?

18- What is the difference between breathing and respiration?


(Q.19 to Q. 27 are of 3 marks Questions)


19- Define the binomial nomenclature. Who gave this?


Write the Scientific name of mustard plant or tiger.

20- Draw a labelled diagram of a cell oraganell which is called power house of cell. Why is it called so?


Draw a T.S view of spinal card.

21- What are nucleotides? Name the four nitrogenous base found in DNA molecule.

22- What is crossing over? Explain With a diagram.


Explain the transmission of impulse at synapse.

23- Give the four characteristic features of phylum chordata.

24- Explain the transport of CO2from tissue to heart.

25- What will happen if the donor’s blood group is “O”and recipient blood group is “A”? Give answer with reason.

26- Draw a labelled diagram of a nurone.

27- Name the site of gaseous exchange in our lungs and how it occurs?


(Q.28 to Q. 30 are of 5 marks Questions)


28- Who proposed the fluidmosaic model of plasma membrane? Describe this model with the help of diagram.


a) Describe the primary, secondary and tertiary structure of protein.

b) Explain the lock and key method of the action of an enzyme.

29- Describe the hatch and Slack path way of CO2fixation in plant leaves.


What is the glycolysis and where does it occur? Describe the glycolysis process in detaile.

30- Name the Pumping organ circulatory system in human. Draw a labelled diagram of internal structure of human heart and explain its all parts.


What is excretion? Name the nitrogenous wastes in human. Describe the structure of excreting system of human with the help of suitable diagram.



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