ISC (Commerce)
ISC (Arts)
ISC (Science)
Academic Year: 2014-2015
Date: मार्च 2015
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Answer all questions in Part I and six questions in Part II choosing two questions from each of the three sections A(Q2-Q4), B(Q5-Q7) . and C(Q-8-Q10)
What is heterosis?
Chapter: [0.032] Strategies for Enhancement in Food Production
Why is non-cyclic photo phosphorylation considered as a non-cyclic pathway?
Chapter: [0.012] Sexual Reproduction in Flowering Plants
Define the following:
test cross.
Chapter: [0.021] Principles of Inheritance and Variation
What are introns?
Chapter: [0.022000000000000002] Molecular Basis of Inheritance
Triple Fusion involves:
(i) Fusion of one male, gamete with female gamete
(ii) Fusion of tube nucleus with generative nvcleus
(iii) Fusion of two polar nuclei.
(iv) Fusion of second male gamete with two polar nuclei
Chapter: [0.012] Sexual Reproduction in Flowering Plants
An EEG represents spontaneous electrical activity of the:
(i) Kidney
(ii) Spinal cord
(iii) Heart
(iv) Brain
Chapter: [0.031] Human Health and Diseases
The genotype of a person withTumer's syndrome will be:
(i) 44+XXY
(ii) 44+XYY
(iii) 44+XO
(iv) 44+XXYY
Chapter: [0.021] Principles of Inheritance and Variation
Transcription is the transfer of genetic code from a DNA molecule to:
(i) RNA molecule
(ii) Second DNA molecule
(iii) Ribosomal sub unit·
(iv) Sequence of amino acids in a protein molecule
Chapter: [0.022000000000000002] Molecular Basis of Inheritance
Scientific term for the first formed category of photosynthetic organisms.
Chapter: [0.052000000000000005] Ecosystem
Scientific term for the surgical removal of a section of fallopian tube.
Chapter: [0.013000000000000001] Human Reproduction
scientific term for an animal behaviour which benefits others but is of no advantage to itself.
Chapter: [0.032] Strategies for Enhancement in Food Production
Scientific term for the hydrostatic pressure developed inside the cell on the cell wall due to endosmosis.
Chapter: [0.042] Biotechnology and Its Applications
Expand the STD
Chapter: [0.013999999999999999] Reproductive Health [0.031] Human Health and Diseases
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Name the scientists who Discovered the fossil of Australopithecus
Chapter: [0.023] Evolution
Name the scientists : Microspheres
Chapter: [0.052000000000000005] Ecosystem
Name the scientists who Coined the term Diffusion Pressure Deficit
Chapter: [0.032] Strategies for Enhancement in Food Production
Name the scientists who Invented the CT scan
Chapter: [0.031] Human Health and Diseases
Give any three characters that have developed during human evolution
Chapter: [0.023] Evolution
Give any two distinctive features of Dryopithecus.
Chapter: [0.023] Evolution
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
Chapter: [0.023] Evolution
Give two chromosomal similarities between man and apes.
Chapter: [0.023] Evolution
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
Chapter: [0.023] Evolution
Persons suffering from sickle cell anaemia are at an advantage in Malaria infested areas. Explain .
Chapter: [0.031] Human Health and Diseases
What are analogous organs? Describe with one example from the plant kingdom.
Chapter: [0.032] Strategies for Enhancement in Food Production
With the help of diagrams, name and describe the different types of placentation seen in angiosperms.
Chapter: [0.012] Sexual Reproduction in Flowering Plants
Give four points of anatomical differences between a monocot stem and a dicot stem
Chapter: [0.042] Biotechnology and Its Applications
Define Racemose inflorescence
Chapter: [0.012] Sexual Reproduction in Flowering Plants
Define Osmotic pressure
Chapter: [0.032] Strategies for Enhancement in Food Production
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Draw a diagram of the internal structure of the human ovary.
Chapter: [0.013000000000000001] Human Reproduction
Define the term water potential.
Chapter: [0.032] Strategies for Enhancement in Food Production
What are components of water potential? Explain
Chapter: [0.032] Strategies for Enhancement in Food Production
Definition and importance of Imbibition
Chapter: [0.032] Strategies for Enhancement in Food Production
Give four adaptations in flowers pollinated by insects.
Chapter: [0.023] Evolution
Describe the mass flow hypothesis for translocation of organic solutes (food) in plants.
Chapter: [0.032] Strategies for Enhancement in Food Production
Write a brief note on the causes of infertility.
Chapter: [0.013999999999999999] Reproductive Health
Give any four reasons for Mendel's success.
Chapter: [0.021] Principles of Inheritance and Variation
Briefly describe the technique employed in DNA fingerprinting.
Chapter: [0.022000000000000002] Molecular Basis of Inheritance
Give any two features of Genetic Code.
Chapter: [0.022000000000000002] Molecular Basis of Inheritance
Explain the mechanism of action of T cells to antigens.
Chapter: [0.022000000000000002] Molecular Basis of Inheritance
Explain how insulin can be produced using recombinant DNA technology.
Chapter: [0.042] Biotechnology and Its Applications
What is pisiculture? Give one advantage.
Chapter: [0.032] Strategies for Enhancement in Food Production
Name the causative organism and preventive measures for Swine flu
Chapter: [0.031] Human Health and Diseases
Name the causative organism and preventive measures for Typhoid
Chapter:
Name the causative organism and preventive measures for Filariasis
Chapter: [0.031] Human Health and Diseases
Name the causative organism and preventive measures for Syphilis
Chapter: [0.031] Human Health and Diseases
State four causes of population growth.
Chapter: [0.051] Organisms and Populations
State consequences of population growth.
Chapter: [0.051] Organisms and Populations
Differentiate between: Cannabinoids and Barbiturates
Chapter: [0.031] Human Health and Diseases
Differentiate between Biotic potential and Carrying capacity
Chapter: [0.051] Organisms and Populations
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CISCE previous year question papers Class 12 Biology (Theory) with solutions 2014 - 2015
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