CBSE Class 11 Biology Question Paper Set 16 Solved

1 Which part of the long intestine harbours symbiotic bacteria in human? 

2 Name the proteins that form myofibrils in muscle fibres. 

3 Which type of joint allows limited movements of the bone in human body? 

4 Why Hypothalamus is said to be endocrine? 

5 Plants like Rhizophora, can grow well in swampy areas. How? 

6 What is the cause of emphysema? How is it characterized? 

7 How are blood platelets formed? What will happen if their count is less in human blood? 

8 Give one example of a) ammonotelic animal  b) urecotelic animal 

9 State the significance of ciliary movements in our body.

OR

Name the pigment present in muscle and how do you classify the muscles based on this pigment

10 Explain the types of axon in neural system. 

11 Give reason, the immune responses of old persons become weak. 

12 Write down two distinguishing feature of a stem.

13 Write down the function of a) amylases b) lipases c) nucleases 

14 Observe the graph and answer the following questions

Name the curve shown in the graph. Where this kind of graph is important? How many molecules of oxygen is carried by each molecule of hemoglobin?

15 Briefly explain how are electrical impulses generated and transmitted in human heart. 

16 Specify the three steps and associated parts of excretory system during urine formation in human. 

17 Describe the different groups of ribs in rib cage. 

18 Where is Organ of Corti located? Describe its structure.

OR

Name the three layers of cells in the innermost layer of the eye and describe them.

19 How do you group the hormones based on their chemical nature? Mention the types of hormone receptor.

20 Give example(s) of:

(a) Hyperglycemic hormone and hypoglycemic hormone

(b) Hypercalcemic hormone

(c) Gonadotrophic hormones

(d) Progestational hormone

(e) Blood pressure lowering hormone

(f) Androgens and estrogens

21 What is phyllotaxy? What type of phyllotaxy seen in Plants Such as Guava, sun flower and Alstonia? How do you distinguish between a leaf and a leaflet?

22 Draw a section of a monocotyledonous seed and label any four parts in it. 

23 Which type of fleshy fruit mango is? Define it and account on its pericarp. 

24 What is inflorescence? Mention its types. Write one difference between them. 

25 Mucosa of Alimentary canal is a vital layer for digestion. Comment on it.

OR

Write one function of each of the following:

a) Albumin in plasma

b) Basophils

c) Systemic circulation

d) A-V valves

e) Pulmonary artery

26 What is Uremia? Why is this condition harmful to us? Describe how these uremic patients are treated.

OR

Explain the generation and conduction of nerve impulse from dendrite of one nerve cell to dendrite of another nerve cell.

27 How are modifications of stems useful to these following plants?

i) Colacasia   ii) Water melon   iii) Bougainvillea   iv) Opuntia   v) Banana

OR

Define the following terms;

a) Staminode

b) Apocarpous ovary

c) Placentation

d) Aestivation

e) Venation

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