HSC Science (General)
Academic Year: 2022-2023
Date & Time: 7th March 2023, 11:00 am
Duration: 3h
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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.
Histones are rich in ______.
alanine and glycine
lysine and arginine
histidine and serine
cysteine and tyrosine
Chapter: [0.04] Molecular Basis of Inheritance
How many mitotic divisions take place during the formation of a female gametophyte from a functional megaspore?
One
Two
Three
Four
Chapter: [0.01] Reproduction in Lower and Higher Plants
Which of the following is the only gaseous plant growth regulator?
ABA
Cytokinin
Ethylene
Gibberellin
Chapter: [0.07] Plant Growth and Mineral Nutrition
The pH of nutrient medium for plant tissue culture is in the range of ______.
2 to 4.2
5 to 5.8
7 to 7.5
8 to 9.5
Chapter: [0.11] Enhancement of Food Production
Rivet Popper Hypothesis is an analogy to explain the significance of ______.
Biodiversity
natality
sex-ratio
age distribution ratio
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Which of the following group shows ZW-ZZ type of sex determination?
Pigeon, Parrot, Sparrow
Parrot, Bat, Fowl
Bat, Fowl, Crow
Sparrow, Fowl, Cat
Chapter: [0.03] Inheritance and Variation
In Hamburger’s phenomenon, ______.
CI‾ diffuse into WBC
CI‾ diffuse into RBCs
Na+ diffuse into RBCs
Na+ diffuse into WBCs
Chapter: [0.08] Respiration and Circulation
Calcium and Phosphate ions are balanced between blood and other tissues by ______.
Thymosin and Parathormone
Calcitonin and Somatostatin
Collip’s hormone and Calcitonin
Calcitonin and Thymosin
Chapter: [0.09] Control and Co-ordination
Identify the INCORRECT statement.
In a flaccid cell, T.P. is zero.
In a turgid cell, DPD is zero.
In a fully turgid cell, TP = OP.
The water potential of pure water is negative.
Chapter: [0.06] Plant Water Relation
Which of the following is a hormone-releasing contraceptive?
Cu-T
Cu-7
Multiload-375
LNG-20
Chapter: [0.02] Reproduction in Lower and Higher Animals
Which disease is caused by HPV?
Chapter: [0.1] Human Health and Diseases
Which device is used to clean both dust and gases from polluted air?
Chapter:
Mention the name of a sterile animal produced by intergeneric hybridisation.
Chapter: [0.05] Origin and Evolution of Life
Give the name of first transgenic plant.
Chapter: [0.12] Biotechnology
A child has low BMR, delayed puberty and mental retardation. Identify the disease.
Chapter: [0.09] Control and Co-ordination
Identify ‘A’ in the given graph of population growth:
Chapter: [0.13] Organisms and Populations
Complete the following box with reference to symptoms of mineral deficiency:
| Abscission | Pre-mature fall of flowers, fruits and leaves |
| ______ | Appearance of green and non-green patches on leaves |
Chapter: [0.07] Plant Growth and Mineral Nutrition
Give an example of plant having both kidney and dumb-bell shaped guard cells in stomata.
Chapter: [0.06] Plant Water Relation
Draw a neat diagram of thyroid gland and label thyroid follicle, follicular cells and blood capillaries.
Chapter: [0.09] Control and Co-ordination
Give a reason – ABA is also known as an antitranspirant.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Explain the role of chlorophyllase enzyme in banana.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Complete the chart showing human proteins produced by rDNA technology to treat human diseases and re-write:
| Disorders/diseases | Recombinant Proteins |
| ? | Erythropoietin |
| Asthma | ? |
| ? | Tissue plasminogen activator |
| Emphysema | ? |
Chapter: [0.12] Biotechnology
Define and or explain the term:
imbibition
Chapter: [0.06] Plant Water Relation
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Explain how imbibition helps root hairs in adsorption of water.
Chapter: [0.06] Plant Water Relation
Draw a neat diagram of the conducting system of human heart and label AV node, Bundle of His and Purkinje fibres.
Chapter: [0.08] Respiration and Circulation
Distinguish between heterochromatin and euchromatin with reference to staining property and activity.
Chapter: [0.04] Molecular Basis of Inheritance
Complete the following chart regarding energy flow in an Ecosystem and re-write:
| ? | Herbivores |
| Primary Producer | ? |
| ? | Man, Lion |
| Secondary consumer | ? |
Chapter: [0.14] Ecosystems and Energy Flow
What is ‘biofortification’?
Chapter: [0.11] Enhancement of Food Production
Mention one example each of fortification with reference to –
- Amino acid content
- Vitamin-C content
Chapter: [0.11] Enhancement of Food Production
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
Chapter: [0.03] Inheritance and Variation
Define the term:
Genetic drift
Chapter: [0.05] Origin and Evolution of Life
Define the term:
Homologous organs
Chapter: [0.05] Origin and Evolution of Life
What is ex-situ conservation?
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Mention any two places where the ex-situ conservation is undertaken.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Define – Incomplete dominance.
Chapter: [0.03] Inheritance and Variation
If a red flowered Mirabilis jalapa plant is crossed with a white flowered plant, what will be the phenotypic ratio in F2 generation? Show it by a chart.
Chapter: [0.03] Inheritance and Variation
Differentiate between sympathetic and parasympathetic nervous system with reference to the following:
- Pre and post-ganglionic nerve fibres
- Effect on heartbeat
Chapter: [0.09] Control and Co-ordination
Give reason – All spinal nerves are of mixed type.
Chapter: [0.09] Control and Co-ordination
Draw a suitable diagram of replication of eukaryotic DNA and label any three parts.
Chapter: [0.04] Molecular Basis of Inheritance
How many amino acids will be there in the polypeptide chain formed on the following mRNA?
5'GCCACAUGGAGAUGACGACAAAAUUUUACUAGAAAA3'
Chapter: [0.04] Molecular Basis of Inheritance
Describe the steps in breathing.
Chapter: [0.08] Respiration and Circulation
What is spermatogenesis?
Chapter: [0.02] Reproduction in Lower and Higher Animals
Draw a neat and labelled diagram of spermatogenesis.
Chapter: [0.02] Reproduction in Lower and Higher Animals
What is a connecting link?
Chapter: [0.05] Origin and Evolution of Life
Which fossil animal is considered as the connecting link between reptiles and birds? Give any one character of each class found in it.
Chapter: [0.05] Origin and Evolution of Life
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Complete the following chart regarding population interaction and re-write:
| Sr. No. | Name of interaction | Interaction between |
| 1. | ? | Plasmodium and Man |
| 2. | ? | Leopard and Lion |
| 3. | ? | Clownfish and Sea-anemone |
Chapter: [0.13] Organisms and Populations
What is the composition of biogas?
Chapter: [0.11] Enhancement of Food Production
Mention any four benefits of biogas.
Chapter: [0.11] Enhancement of Food Production
Give reason – Water acts as thermal buffer
Chapter: [0.06] Plant Water Relation
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
Chapter: [0.06] Plant Water Relation
Explain three main functions of free antibodies produced by B-lymphocytes.
Chapter: [0.1] Human Health and Diseases
Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Give any four points of significance of double fertilization.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Name the hormone that is responsible for apical dominance.
Chapter: [0.07] Plant Growth and Mineral Nutrition
A farmer wants to remove broad-leaved weeds from the jowar plantation in his field. Suggest any plant hormone to remove such weeds.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Mention any two applications of cytokinin.
Chapter: [0.07] Plant Growth and Mineral Nutrition
What is blood pressure?
Chapter: [0.08] Respiration and Circulation
Give the name of the instrument which is used to measure the blood pressure.
Chapter: [0.08] Respiration and Circulation
Differentiate between an artery and a vein with reference to lumen and thickness of wall.
Chapter: [0.08] Respiration and Circulation
Describe any three adaptations in anemophilous flowers.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Mention any one example of the anemophilous flower.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Describe any three adaptations in hydrophilous flowers.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Mention any one example of the hydrophilous flower.
Chapter: [0.01] Reproduction in Lower and Higher Plants
What is polymerase chain reaction (PCR)?
Chapter: [0.12] Biotechnology
Describe three steps involved in mechanism of PCR.
Chapter: [0.12] Biotechnology
Give any four significances of fertilization in humans.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Mention the names of any two organs each derived from ectoderm and mesoderm.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Give any two functions of cerebellum.
Chapter: [0.09] Control and Co-ordination
Write the names of any four motor cranial nerves with their appropriate serial number.
Chapter: [0.09] Control and Co-ordination
Which hormones stimulate liver for glycogenesis and glycogenolysis?
Chapter: [0.09] Control and Co-ordination
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