HSC Science (General)
Academic Year: 2021-2022
Date: March 2022
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General instructions:
- The question paper is divided into four sections:
- Section A: Question No. 1 contains 10 multiple choice type questions carrying one mark each. Question No. 2 contains 8 very short answer type questions carrying one mark each.
- Section B: Question No. 3 to Question No. 14 are 12 short answer-I type questions carrying two marks each. Attempt any eight questions.
- Section C: Question No. 15 to Question No. 26 are 12 short answer-II type questions carrying three marks each. Attempt any eight questions.
- Section D: Question No. 27 to Question No. 31 are 5 long answer type questions carrying four marks each. Attempt any three questions.
- Start each section on a new page.
- Figures to the right indicate full marks.
- For each MCQ, correct answer must be written along with its alphabet.
e.g., (a) ..... / (b ) .... / ( c ) .... / ( d) ..... Only first attempt will be considered for evaluation.
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
habitat loss
hunting
Alien species invasion
overexploitation
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
The proportion of an allele in the gene pool to the total number of alleles at a given locus is called _______.
gene pool
gene frequency
gene flow
genetic drift
Chapter: [0.05] Origin and Evolution of Life
Gibberellins are synthesised from ______.
Acetic acid
Mevalonic acid
Tryptophan
Ethephon
Chapter: [0.07] Plant Growth and Mineral Nutrition
Ti plasmid being used for introducing genes in plants obtained from ______.
Agrobacterium rhizogenes
Escherichia coli
Agrobacterium T20
Agrobacterium tumefaciens
Chapter: [0.12] Biotechnology
The third ventricle of brain is connected to the fourth ventricle of brain through ______.
Foramen of Monro
Duct of Sylvius
Metacoel
Eustachian tube
Chapter: [0.09] Control and Co-ordination
In the zone of absorption, epidermal cells form unicellular hair-like extensions called ________.
Epiblema cells
Roots
Root hairs
Velamen tissues
Chapter: [0.06] Plant Water Relation
A template strand of DNA has the base sequence CATGATTAC. New strand synthesized on it will be:
GATCAUATG
GTACTAACG
GAACTAATG
GTACTAATG
Chapter: [0.04] Molecular Basis of Inheritance
'Pathogens' are ______.
Substances produced against any disease.
Chemical substances produced by the host cells to kill the parasite animal.
Disease causing organisms
Cells which kill the parasites
Chapter: [0.1] Human Health and Diseases
Growth of new grasses and shrubs on a patch of forest burnt down by forest fire, is a an example of ______.
secondary succession
pioneer species
climax species
primary succession
Chapter: [0.14] Ecosystems and Energy Flow
Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.
deletion
duplication
inversion
translocation
Chapter: [0.05] Origin and Evolution of Life
Rearrange the terms population, Biome, Community and Organisms in ecological hierarchy
Chapter: [0.13] Organisms and Populations
Identify the permanent birth control method in given diagram.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Define the term ‘Mendelian population’.
Chapter: [0.05] Origin and Evolution of Life
Identify the pulse point ‘A’ from below given diagram.
Chapter: [0.08] Respiration and Circulation
What is ‘biofortification’?
Chapter: [0.11] Enhancement of Food Production
What is the reason for the 21st trisomy?
Chapter: [0.03] Inheritance and Variation
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What is the role of suspensor during the development of embryo?
Chapter: [0.01] Reproduction in Lower and Higher Plants
What are the different adaptations shown by bird-pollinated flowers?
Chapter: [0.01] Reproduction in Lower and Higher Plants
A gardener wants to give bushy appearance to plants in our college campus.
- What should he do to achieve the same?
- Which property of phytohormones he must be aware of?
Chapter: [0.07] Plant Growth and Mineral Nutrition
Identify the parts labelled in the given diagram.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Explain the mechanism of sex determination in birds.
Chapter: [0.03] Inheritance and Variation
Draw diagram of conducting system of human heart. Label SA node and bundle of His.
Chapter: [0.08] Respiration and Circulation
What are the different types of water?
Chapter: [0.06] Plant Water Relation
Differentiate between Heterochromatin & Euchromatin.
Chapter: [0.04] Molecular Basis of Inheritance
Give an account of external genitalia in human females.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Name the glucocorticoid used in treatment of allergy and why?
Chapter: [0.09] Control and Co-ordination
For production of edible vaccines plants are used. Explain this any one example.
Chapter: [0.12] Biotechnology
Give any four points of significance of double fertilization.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Match the column A with B and rewrite correct pairs.
| A | B | |
| i | Atlas 66 | vit A |
| ii | Rice | vit C |
| iii | Spinach | protein |
| iv | bitter gourd | Iron |
Chapter: [0.11] Enhancement of Food Production
Explain various categories of apomixis.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Enlist the four types of T- lymphocytes, responsible for immune response of our body.
Chapter: [0.1] Human Health and Diseases
How Meselson and Stahl explained the concept of Semiconservative Replication of DNA experimentally?
Chapter: [0.04] Molecular Basis of Inheritance
State any three benefits of mycorrhiza.
Chapter: [0.11] Enhancement of Food Production
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Define hypertension. Explain coronary artery disease and angina pectoris.
Chapter: [0.08] Respiration and Circulation
Name any three types of postmating isolating mechanisms.
Chapter: [0.05] Origin and Evolution of Life
What is Commensalism? Explain it with suitable example.
Chapter: [0.13] Organisms and Populations
Human pregnancy shows three prominent trimesters. Answer the following question based on these trimester.
- What is morning sickness during the first trimester?
- Name the hormone secreted in the second trimester.
- The organ which secretes hormone in second trimester is
Chapter: [0.02] Reproduction in Lower and Higher Animals
Explain the following sequence of succession after a forest fire.
Chapter: [0.14] Ecosystems and Energy Flow
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Answer the questions after observing the diagram given below.
- What acts as the first messenger?
- Why can’t hormones like catecholamines enter their target cells through plasma membrane?
- Name the mode of hormone action shown in the diagram.
Chapter: [0.09] Control and Co-ordination
Give reasons for the development of Turner’s syndrome and also mention its symptoms.
Chapter: [0.03] Inheritance and Variation
Give the full form of IAA.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Write full form of IBA
Chapter: [0.07] Plant Growth and Mineral Nutrition
Write full form of NAA
Chapter: [0.07] Plant Growth and Mineral Nutrition
Write full form of 2,4-D
Chapter: [0.07] Plant Growth and Mineral Nutrition
Describe the functional areas of Cerebrum.
Chapter: [0.09] Control and Co-ordination
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
With the help of chart identify and write the function of any four leucocytes.
| Type | Leucocytes | Name of cell | Function |
| Granulocytes |  |
||
 |
|||
 |
|||
| Agranulocytes |  |
||
 |
Chapter: [0.08] Respiration and Circulation
What is PCR? Explain different steps involved in it.
Chapter: [0.12] Biotechnology
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