Smt. P.A.Sodha Sarvajanik Marathi High School & Haji Ahmedji Musaji Vhora Junior College, Navapur Tal. Navapur Dist. Nandurbar
Prelim Examination
Std. XII - Sub. Biology Time: 3 & 1/2 Hrs. Max. Marks : 70
General Instructions :
1. All questions are compulsory.
2. Section A contains Q.no.1 to 10 of Multiple-Choice type Questions (MCQ),
each carrying one mark each. Q.No.1 to 8 Very Short Answer (VSA) type
questions carrying one mark each.
3. Section B contains Q.no.3 to 14 of Short Answer type Questions carrying
two marks each.
4. Section C contains Q.no.15 to 26 of Short Answer type Questions carrying
three marks each.
5. Section D contains Q.no.27 to 31 of Long Answer type Questions carrying
five marks each.
Q.1 Write the most appropriate answer from the given multiple options. (10)
i. Match the column-I & column-II (1)
Column-I
P) Cold
Q) Pneumonia ii) HIV
R) AIDS
S) Typhoid
a. P-i, Q-iv, R-v, S-ii b. P-i, Q-iv, R-ii, S-v
c. P-i, Q-iv, R-ii, S-iii d. P-i, Q-iii, R-ii, S-iv
ii. Chipko Movement is related to........... (1)
a. Water conservation b. Forest conservation
c. Soil conservation d. Conservation of endangered species
iii. Webbed neck is characteristic of...........
a. XXY sex chromosomes b. XY sex chromosomes
c. XYY sex chromosomes d. XO sex chromosomes
iv. Genome is .............
a. all the chromosomes present in the diploid cell.
b. total chromosome number of any cell.
c. total number of genes present in cell or virus.
d. total number of genes present on a chromosome.
v. In ecosystem, the rate of production of organic matter during
photosynthesis is termed as .........
a. Net primary productivity b. Gross primary productivity
c. Secondary productivity d. Net productivity
vi. One molecule of NADH, gives how many ATPs in ETS. (1)
a. 2ATP b. 3 ATP c. 4 ATP d. 6 ATP
vii. Pathway of Calvin cycle was discovered by using an isotope of ...... (1)
a. b.
c.
d.
viii. VAM represents.........
a. Saprophytic fungi b. Symbiotic fungi
c. Saprophytic bacteria d. Symbioticbacteria
ix. The enzymes that cut specifically recognition sites in the DNA is known as
a. DNA ligase b. DNA Polymerase
c. Reverse transcriptase d. Restriction endonuclease
x. Identify heterozygous condition.
a. IT b. Tt c. It d. TTT
Q.2 Answer the following questions in one sentence each : (7)
i. Name the hormone that controls secondary sexual character in human male.
ii. What is the formula of Natality?
iii. Write any two viral diseases of Poultry birds ?
iv. Identify genotype of Turner's syndrome from following.
a ) 44+XO b) 44+ XXY
v. What is Leaching?
vi. What will be the ratio of pure tall to pure dwarf in F, if a pure tall plant is
crossed with dwarf.
vii. Why chlorophyll 'a' is called reaction centre ?
viii. Define the term Allel with suitable example.
Section-B
Q.3 Answer the following questions in short. (Any Eight) (16)
3. What is Cardiac output ? How it is calculated? (2)
4. Identify the given figure and give its function. (2)
5. What is inbreeding depression ? How it is overcome? (2)
6. Give name of malarial parasite ? Which host it require to complete its life
cycle.
7. Write the difference between human X & Y chromosome. (2)
8. What is connecting link ? Write the name of fossil that connects reptile and
birds.
9. Which fossil is called as Ape with man brain? Give any two characters. (2)
10. Write schematic representation of Carbon cycle.
11. Describe interdependence of light and dark reaction of photosynthesis. (2)
12. Illustrate any two antibiotics with their microbial sources. (2)
13. Draw a neat, well labelled diagram oft RNA. (2)
14. Define the term Cistron and Muton. (2)
Section-C
Q.4 Answer the following questions. (Any Eight) (24)
15. With neat labelled diagram, describe the structure of human sperm. (3)
16. What is DNA profiling? Give its significance. (3)
17. Draw a neat labelled diagram of T.S. of microsporangium. (3)
18. Explain mechanism of anaerobic respiration.
19. Define the terms - i) Callus ii) Explants iii) Clone (3)
20. Sketch and label three steps of PCR technique. (3)
21. Draw neat labelled diagram of excretory system of man. (3)
22. Give the one role of the following hormone.
STH, LTH, ACTH.
23. Describe the process of fertilization in human. (3)
24. With neat labelled diagram describe ultra structure of Mitochondria. (3)
25. Give schematic representation of Calvin cycle. (3)
26. Give significance of respiration
Section-D
Q.5 Answer the following questions. (Any Three). (12)
27. Describe replication of DNA in eukaryotic cell. (4)
28. Describe the structure of an anatropous ovule with a labelled diagram (4)
29. With neat labelled diagram, describe internal structure of Spinal cord (4)
30. Describe internal structure of human heart. (4)
31. State law of Dominance. Explain it with reference to the inheritance of
height of the garden plant.
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