HSC Science (General)
Academic Year: 2021-2022
Date & Time: 17th March 2022, 10:30 am
Duration: 3h30m
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General instructions :
The question paper is divided into four sections :
- Section A: Q. No. 1 contains Ten multiple-choice type of questions carrying One mark each. Q. No. 2 contains Eight very short answer type of questions carrying One mark each.
- For each multiple-choice type of question, it is mandatory to write the correct answer along with its alphabet. e.g., (a)......../(b)......../(c)......./(d)........ No marks(s) shall be given if ONLY the correct answer or the alphabet of the correct answer is written. Only the first attempt will be considered for evaluation.
- Section B: Q. No. 3 to Q. No. 14 contain Twelve short answer type of questions carrying Two marks each. (Attempt any Eight).
- Section C: Q. No. 15 to Q. No. 26 contains Twelve short answer type of questions carrying Three marks each. (Attempt any Eight).
- Section D: Q. No. 27 to Q. No. 31 contain Five long answer type of questions carrying Four marks each. (Attempt any Three).
- Begin the answer of each section on a new page.
- Figures to the right indicate full marks.
How many meiotic and mitotic divisions occur during the development of male gametophyte from the mother cell?
One meiotic and two mitotic
Two meiotic only
Two mitotic only
One mitotic and one meiotic
Chapter: [0.01] Reproduction in Lower and Higher Plants
During the replication of DNA, the separated strands are prevented from recoiling by using ______.
single strand binding protein
reverse transcriptase
endonuclease
polymerase
Chapter: [0.04] Molecular Basis of Inheritance
Which event is represented by the above diagram, related to chromosomal aberrations?
Deletion
Duplication
Inversion
Translation
Chapter: [0.05] Origin and Evolution of Life
______ hormone is responsible for the efflux of K+ ions from guard cells and acts as an antitranspirant.
Gibberellins
Cytokinin
Ethylene
Abscisic acid
Chapter: [0.07] Plant Growth and Mineral Nutrition
Multiple choice question.
Test tube baby technique is called _______.
in vivo fertilization
in situ fertilization
in vitro fertilization
artificial insemination
Chapter: [0.02] Reproduction in Lower and Higher Animals
While playing cricket Raju faces problems of severe pain and heaviness in the chest. Pain spreads from the neck, lower jaw, left arm and left shoulder. From the above symptoms identify the disease:
Malaria
Angina pectoris
Kidney failure
Typhoid
Chapter: [0.08] Respiration and Circulation
______ layer is in close contact of the CNS in human beings.
Cranium
Dura mater
Arachnoid mater
Pia mater
Chapter:
Cellular factors in innate immunity is provided by ______.
phagocytes
antibody
T-lymphocyte
B-lymphocyte
Chapter: [0.1] Human Health and Diseases
Pick out the appropriate association representing brood parasitism.
Hermit crab and sea anemone
Asian koel and common Indian crow
Algae and fungi
Buffalo and cattle egret
Chapter: [0.13] Organisms and Populations
Annealing step of PCR operates at ______ °C.
90-98
40-60
70-75
100-120
Chapter: [0.12] Biotechnology
Very short answer type question:
Name the part of gynoecium that determines the compatible nature of pollen grain.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Which is the primary precursor of IAA in plants?
Chapter: [0.07] Plant Growth and Mineral Nutrition
Name the cell which is responsible for nitrogen fixation in cyanobacteria.
Chapter: [0.07] Plant Growth and Mineral Nutrition
How many Biodiversity hotspots have been identified around the world?
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Name the plant disease caused by Agrobacterium tumefaciens.
Chapter: [0.12] Biotechnology
Identify the trophoblast cells which are in contact with the embryonal knob during blastulation.
Chapter: [0.02] Reproduction in Lower and Higher Animals
From the given diagram, identify the type of population growth curve:
Chapter: [0.13] Organisms and Populations
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What do you mean by pioneer species?
Chapter: [0.14] Ecosystems and Energy Flow
Identify A, B, C, D, in the given diagram of the human reproductive system:
Chapter: [0.02] Reproduction in Lower and Higher Animals
Identify chromosomal disorder caused due to non-disjunction of the 21st number of chromosomes and enlist its symptoms.
Chapter: [0.03] Inheritance and Variation
Write the aims of the human genome project.
Chapter: [0.04] Molecular Basis of Inheritance
Match the parts of the ovule given in column I with the parts of the seed given in column II:
| Column I | Column II |
| (a) egg | (1) testa |
| (b) nucellus | (2) tegmen |
| (c) outer integument | (3) perisperm |
| (d) inner integument | (4) embryo |
Chapter: [0.01] Reproduction in Lower and Higher Plants
Enlist the characteristics of Neanderthal Man.
Chapter: [0.05] Origin and Evolution of Life
Define the following:
Gravitational water
Chapter: [0.06] Plant Water Relation
Define the following:
Hygroscopic water
Chapter: [0.06] Plant Water Relation
Define the following:
Combined water
Chapter: [0.06] Plant Water Relation
Define the following:
Capillary water
Chapter: [0.06] Plant Water Relation
Explain the different properties of water.
Chapter: [0.06] Plant Water Relation
A person met with a small accident and bleeds but very soon stops bleeding. Explain the physiological process responsible for this.
Chapter: [0.08] Respiration and Circulation
Match the antibiotics in column I with their microbial sources in column II:
| Column I | Column II |
| (a) Chloromycetin | (1) Streptomyces griseus |
| (b) Erythromycin | (2) Streptomyces aurifaciens |
| (c) Streptomycin | (3) Streptomyces venezuelae |
| (d) Terramycin | (4) Streptomyces erythreus |
Chapter: [0.11] Enhancement of Food Production
Abscisic acid is the common name given to two identical substances isolated separately. Name them.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Give the chemical features of abscisic acid.
Chapter: [0.07] Plant Growth and Mineral Nutrition
What are the effects of biotechnology with relation to human health?
Chapter: [0.12] Biotechnology
Give the adaptations shown by desert animals.
Chapter: [0.13] Organisms and Populations
Explain natural selection with the example of industrial melanism.
Chapter: [0.05] Origin and Evolution of Life
Describe physiological effects and applications of gaseous hormones in plants.
Chapter: [0.07] Plant Growth and Mineral Nutrition
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What is ecological succession?
Chapter: [0.14] Ecosystems and Energy Flow
Name various seral stages from pioneer species to climax community with suitable examples in hydrarch succession.
Chapter: [0.14] Ecosystems and Energy Flow
Draw a neat and labelled diagram of Root hair.
Chapter: [0.06] Plant Water Relation
Describe structure of root hair.
Chapter: [0.06] Plant Water Relation
Complete the following flow diagram of double circulation:
Chapter: [0.08] Respiration and Circulation
Mention the difference between hypothyroidism and hyperthyroidism.
Chapter: [0.09] Control and Co-ordination
Short Answer Question:
Write a note on applications of DNA fingerprinting.
Chapter: [0.04] Molecular Basis of Inheritance
Write a note on In-situ conservation.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Write a note on Ex-situ conservation.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Short answer question
List the properties of the nerve fibres.
Chapter: [0.09] Control and Co-ordination
Name the causative agent of typhoid fever?
Chapter: [0.1] Human Health and Diseases
Write the mode of transmission of typhoid.
Chapter: [0.1] Human Health and Diseases
Give the symptoms of typhoid.
Chapter: [0.1] Human Health and Diseases
Match the following products with their microbial sources:
| Products | Microbial Sources | ||
| (a) | Vitamin B2 | (1) | Rhizopus arrhizus |
| (b) | Fumaric acid | (2) | Candida lipolytica |
| (c) | Vitamin B12 | (3) | Trichoderma konigii |
| (d) | Lipase | (4) | Neurospora gossypii |
| (e) | Cellulase | (5) | Pseudomonas denitrificans |
| (f) | Citric Acid | (6) | Aspergillus niger |
Chapter: [0.11] Enhancement of Food Production
Explain any three examples of biopiracy.
Chapter: [0.12] Biotechnology
With the help of neat and labelled diagrams artery and vein.
Chapter: [0.08] Respiration and Circulation
Give any three differences between an artery and a vein
Chapter: [0.08] Respiration and Circulation
State the names of hormones and glands secreting them:
Growth of thyroid gland.
Chapter: [0.09] Control and Co-ordination
State the names of hormones and glands secreting them:
Controls tubular absorption of water in the kidney.
Chapter: [0.09] Control and Co-ordination
State the names of hormones and glands secreting them:
Stimulates liver and muscles for glycogenesis.
Chapter: [0.09] Control and Co-ordination
State the names of hormones and glands secreting them:
Development of immune system and maturation of T-lymphocyte.
Chapter: [0.09] Control and Co-ordination
Explain any two contrivances or outbreeding devices for pollination.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Explain the law of dominance and compare how it differs from incomplete dominance and co-dominance.
Chapter: [0.03] Inheritance and Variation
Describe hormonal control in various phases of the menstrual cycle.
Chapter: [0.02] Reproduction in Lower and Higher Animals
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