/ INDIAN SCHOOL AL WADI AL KABIR
FINAL ASSESSMENT 2015-16
CLASS XI Biology (044) M.M:70
23.2.16 Time: 3 Hrs.
INSTRUCTIONS
1. This paper has six sections, A, B, C, D, E & F
2. Section A carries 1 mark each, Section B carries 2 mark each, Section C carries 3 mark each Section D 4 marks, Section E carries 5 mark each and Section F has otba questions.
3. There is one choice in section B & C while section E has all choices but no overall choice.
4. Wherever necessary, the diagrams should be drawn & neatly labeled.
SECTION A
1. What is the difference between Botanical Garden and Herbarium ?
2. If for any reason , the release of ADH is inhibited, how will this affect the volume of urine produced.
3. Name the tissue represented by the jute fibres used for making the ropes.
4. What are kinetochores ?
5. List the three layers of the cells present in the retina.
SECTION B
6. With diagrams, illustrate the development of root nodules in soyabeans.
7.What are bacteriophages, briefly describe their structure.
Page 1 of 5
8. What is a mesosome in a prokaryotic cell, mention the functions it performs.
Or
Name the type of root for the following :
(a) Roots performing the function of photosynthesis.
(b) Roots come above the surface of the soil to absorb air.
(c) The pillar like roots developed from lateral branches for providing mechanical support.
(d) Roots coming out of the lower nodes of the stem and provide the support to the plant.
9.
SECTION C
10. Differentiate between the following:
a) Arithmetic growth & Geometric growth.
b) Heartwood & sapwood.
11. Explain Watson-Crick model on DNA structure
12. (a) What is plasmid ? What is its importance ?
(b) Diagrammatically represent the types of chromosomes based on the po sition of centromere
13. Explain the generation of a nerve impulse through an axon.
Page 2 of 5
14. Give the scientific term for the following statements/processes :
(a) Movement of water in roots through the cell wall exclusively.
(b) The positive hydrostatic pressure developed inside the cell or cell wall.
(c) A solution having relatively less concentration.
(d) Loss of water vapour from the aerial parts of the plants in the form of water vapour.
(e) Movement of a molecule across a membrane independent of other molecule.
(f) Water loss in its liquid phase through the special openings of veins near the tip of leaves of many herbaceous plants.
16.a) Suppose you are examining a cross section of a stem under compound microscope, how would you determine whether it is monocot stem or dicot stem ?
b)Briefly explain the formation of the cambium ring in dicot stem.
17.Give reasons for the following:
a) Cow dung is used in the preparation of biogas.
b) Viruses are obligate parasites.
c) Pteridophytes are restricted to narrow geographical regions.
Page 3 of 5
18.Draw neat & labeled of
a) longitudinal section of the kidney
or
b)An actin & myosin filaments.
19.a)
b) How is the C4 pathway in a paddy plant , advantageous to the plant ?
Page 4 of 5
21.a) With the help of diagram show the genital openings present on the ventral surface of the earthworm.
b)Distinguish between a male & female cockroach
SECTION D
22. A pregnant lady is detected of hypothyroidism by her doctor, this is a serious concern to both, her and her doctor
i) How could this affect her baby, briefly explain
ii)How could deficiency of iodine in the diet cause hypothyroidism.
iii)Name the hormone secreted by this gland and state any one function of this hormone.
iv) Which value is depicted by the doctor.
SECTION E
23.a) Represent the cyclic & non cyclic photophosphorylation scheme of light reaction.
b) Differenciate between the two.
Or
a) Explain with diagram the pathways of water movement in the root.
b) Draw the life cycle of a Pteridophytes
24.a) Explain the term cell cycle
b) With the help of diagrams explain the stages of Prophase 1 of meiosis1 in eukaryotic cells.
Or
a) With the help of a neat & labeled diagram explain the fluid mosaic model of plasma membrane.
b)State any two special features and two functions of Epithelial tissue.
SECTION F
25) otba
26) otba
Page 5 of 5