KV NTPC SHAKTINAGAR
HALF YEARLY EXAM - 2015
CLASS 11
Time: 3 hrs.
BIOLOGY
Max marks: 70
Section- A
1. Which of these has more number of species:an order or a family?
1
2. Name the kind of tissues found at the shoot tip?
1
3.How is RNA differ from DNA in terms of nitrogenous base?
1
4.Which type of roots are found in cuscuta?
1
5.What is the scientific name of Earth worm?
6. What is the main characteristic of Gymnosperms?
1
1
7. Expand PPLO.
1
8. Which force is responsible for ascent of sap? 1
Section-B
9.a.How are Viroids different from Viruses?
b.What are Bacteriophages?
2
10.Distinguish between Poikilothermous and Homiothermous animals?Give one example of each.2
11.Give the names of four classes of Fungi.Write the names of mycelia present in them.
2
12.Name two organelles other than nucleus in which DNA IS found.
OR
Draw a labelled diagram of a Eukaryotic nucleus as seen under the microscope.
2
13.Distinguish between Osmosis and Diffusion.
2
14. Explain what will happen to a plant if it is kept in a solution having higher water potential.
2
15. What is the significance of meiosis?
2
16. Supply the scientific term for the following
2
a) The stalk of a leaf
b) The flat expanded portion of a leaf
17. List two important differences between cartilaginous and bony fishes.
18.Why Linnaeus system of classification was considered an artificial system?
2
2
Section-C
19. Explain d following terms:A.Actinomorphic B.GamosepalousC.Syncarpous3
20.Draw a neat diagram of T.S. of monocot root and label the following in it:Epidermis, cortex,pericycle,xylem,phloem,and
endodermis.
3
21. Write any three differences between Mitosis and Meiosis.
3
22. Define phyllotaxy. Write about the different types of phyllotaxy with examples.
3
23. a.Write the function of the gizzard.
b.Differentiate between Tendon and Ligament.
c. Name the tissue in the Heart.
3
24.Explain why xylem transport is unidirectional and phloem transport bi-directional.
3
25.During the routine check-upof Ramesh’s lipid profile,his cholesterol level indicated on the higher side.The doctor advised
Ramesh to avoid taking animal fat to keep his body fit as well as to avoid cardiac diseases.
a. Why did doctor advise Ramesh to avoid taking animal fat?
b. Why did doctor recommend plant oils?
c. What values are reflected in doctor’s advice?3
26.Classify the plastids on the basis of type of pigments present in them and give their functions.
OR
Give the scientific terms for the following processes:
3
a. Loss of water from leaves through stomata in the form of water vapours.
b. Movement of water in roots exclusively through the cell wall.
c. Water absorbed by solids causing them to enormously increase in volume.
27. Describe the important properties of enzymes.
3
Section-D
28.How are proteins formed?Describe the primary, secondary and tertiary structure of proteins.
OR
Which cell organelle is also called a power house of the cell.Describe it’s structure with the help of a labelled diagram.
5
29.Describe briefly the alimentary canal and digestive glands of Frog, with the help of a neat labelled diagram.
OR
What is simple epithelium? Describe briefly it’s various types.
5
30. List the differences between the internal structure of Dicot stem and Monocot stem.
OR
What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
*************
*****************
**************
5