Organisation : Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE)
Exam Name : HSC Exam 2024
Class : Class 12th
Subject : Biology
Download : Question Paper
Website : https://mahahsscboard.in/mr/questionPaper
MSBSHSE Class 12th Biology Question Paper
Q. 1. Select the correct alternatives and write the answers : [10]
Related / Similar Question Paper : MSBSHSE Class 12th Mathematics & Statistics Question Paper 2024
(i) Identify the growth hormone in plants which causes inhibitory effect.
(a) Cytokinins
(b) Abscissic acid
(c) Gibberellin
(d) Ethylene
(ii) Which one of the following is not a part of lac operon?
(a) Promoter
(b) Regulator
(c) Inducer
(d) Operator
(iii) In absence of fertilization, corpus luteum degenerates into _____.
(a) tunica albugenia
(b) membrana granulosa
(c) zona pellucida
(d) corpus albicans
(iv) Which of the following divides nasal cavity?
(a) Hyaline cartilage
(b) Mesethmoid cartilage
(c) Ligamentum arteriosum
(d) Laryngopharynx
(v) Which of the following is caused by unsterilized needle?
(a) Elephantiasis
(b) AIDS
(c) Malaria
(d) Dengue
(vi) Recognition sequence of restriction enzymes are generally _____ nucleotides long.
(a) 2 to 4
(b) 4 to 8
(c) 8 to 10
(d) 14 to 18
(vii) Which of the following types require pollinator but result is genetically similar to autogamy?
(a) Geitonogamy
(b) Xenogamy
(c) Apogamy
(d) Cleistogamy
(viii) Which one of the following does not evolve further?
(a) Climax community
(b) Primary Succession
(c) Pioneer Species
(d) Seral Community
(ix) Identify the appropriate term for the number of births under ideal conditions :
(a) Absolute mortality
(b) Realized natality
(c) Realized mortality
(d) Absolute natality
Q. 2. Answer the following questions :
(i) What are vestigeal organs?
(ii) Expand the term ZIFT.
(iii) Give the name of endocrine gland which is prominent at birth but gets gradually atrophied in adult stage.
(iv) What is the full form of IAA?
(v) Give the name of microbial source of antibiotic chloromycetin.
(vi) Which cells of islets of Langerhans produce a hormone insulin?
(vii) How many meiotic divisions are required for the formation of 300 seeds in angiosperm?
(viii) Explain the term Emigration
Attempt any EIGHT of the following questions :
Q. 3. What are the reasons for the success of Mendel?
Q. 4. Arrange the following steps of DNA fingerprinting in correct sequence :
(a) Gel electrophoresis
(b) Isolation of DNA
(c) Southern blotting
(d) Restriction digestion
Q. 5. Distinguish between human sperm and ovum.
Q. 6. Enlist the uses of gene therapy.
Q. 7. Define the following terms :
(a) Gene flow
(b) Chromosomal aberrations
Q. 8. What are the significances of double fertilization?
Q. 9. Identify and define ‘A’ and ‘B’ in relation to uptake of water by the root
Q. 10. Describe mutualism.
Q. 11. Explain factors affecting water absorption.
Q. 12. What is differentiation and redifferentiation?
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