HSC Science (General)
Academic Year: 2020-2021
Date: April 2021
Duration: 3h
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- The question paper is divided into four sections.
- Section A: Q. No. 1 contains Ten multiple-choice type of questions carrying One mark each.
- Section A: Q. No. 2 contains Eight very short answer type of questions carrying One mark each.
- Section B: Q. No. 3 to Q. No. 14 contains 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 contains Five long answer type of questions carrying Four marks each. (Attempt any Three).
- Figures to the right indicate full marks.
- For each MCQ, the correct answer must be written along with its alphabet.
e.g., (a) ..... / (b ) .... / ( c ) .... / ( d) ..... Only first attempt will be considered for evaluation.
In human beings 45 chromosomes/single X/XO abnormality causes ______.
Down's syndrome
Klinfelter's syndrome
Turner's syndrome
Edward's syndrome
Chapter: [0.03] Inheritance and Variation
The word chromosome was coined by
Benda
Waldeyer
Robert Hooke
T.H.Morgan
Chapter: [0.03] Inheritance and Variation
Find out the example in which due to absence of respiratory pigment transport of respiratory gases does not takes place.
Cockroach
Scoliodon
Frog
Human
Chapter: [0.08] Respiration and Circulation
The erythropoeitic tissue in adult is mainly found in ______.
kidney
liver
red bone marrow
spleen
Chapter: [0.08] Respiration and Circulation
______ is a mineralocorticoid secreted by Adrenal gland.
Aldosterone
Cortisol
Corticoid
Androgen
Chapter: [0.09] Control and Co-ordination
Degeneration of dopamine producing neurons in the CNS causes ______ disease.
ADHD
Alzheimer’s
Parkinson’s
Fever
Addison's disease
Grave's disease
Chapter: [0.09] Control and Co-ordination
Carcinoma is cancer of ______ cells.
Epithelial
Connective tissue
Bone
Blood
Chapter: [0.1] Human Health and Diseases
Wheat -Atlas 66 has high contents of ______.
protein
vitamin
carbohydrates
Fats
Chapter: [0.11] Enhancement of Food Production
Polar bears show hibernation during ______.
winter
summer
rainy season
favourable conditions
Chapter: [0.13] Organisms and Populations
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
How many linkage groups are present in Drosophila melanogaster?
Chapter: [0.03] Inheritance and Variation
What is the reason for the 21st trisomy?
Chapter: [0.03] Inheritance and Variation
Identify ‘A’ from the following ECG.
Chapter: [0.08] Respiration and Circulation
What is the function of the red nucleus?
Chapter: [0.09] Control and Co-ordination
What is the role of Taq-polymerase in PCR technology?
Chapter: [0.12] Biotechnology
Define ‘Ecological succession’.
Chapter: [0.14] Ecosystems and Energy Flow
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A medicinal plant Rauwolfia vomitoria shows variations in concentration of reserpine from location to location. What type of level of biodiversity is this?
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Mention significance of fruit and seed formation.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Give an account of polyembryony.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Identify the parts labelled in the given diagram.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Write a note on sex linkage.
Chapter: [0.03] Inheritance and Variation
Explain Avery, McCarty, and MacLeod’s experiment in detail.
Chapter: [0.04] Molecular Basis of Inheritance
Describe modern man.
Chapter: [0.05] Origin and Evolution of Life
Draw diagram of conducting system of human heart. Label SA node and bundle of His.
Chapter: [0.08] Respiration and Circulation
How a portal vein differs from normal vein?
Chapter: [0.08] Respiration and Circulation
‘Injury to the medulla oblongata causes sudden death’ Explain.
Chapter: [0.09] Control and Co-ordination
Name two bacteria which are responsible for fermenting dough of idli, dosa.
Chapter: [0.11] Enhancement of Food Production
For production of edible vaccines plants are used. Explain this any one example.
Chapter: [0.12] Biotechnology
With the help of any one example explain Alien species invasion as one of the causes of Biodiversity losses.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
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
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions
(a) Acrosome
(b) Nucleus
(c) Middle piece
Chapter: [0.02] Reproduction in Lower and Higher Animals
Write a note on the morphological structure of the root.
Chapter: [0.06] Plant Water Relation
Write the name of Gaseous growth hormone known to you.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Write the name of Standard bioassay method for auxins.
Chapter: [0.07] Plant Growth and Mineral Nutrition
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Write the name of Hormone that can overcome the requirement of vernalization.
Chapter: [0.07] Plant Growth and Mineral Nutrition
Draw the chart of double circulation and label A, B, C and D.
Chapter: [0.08] Respiration and Circulation
Give the names of the hormones released by neurohypophysis.
A boy shows excessive thirst and micturition because of deficiency of a hormone secreted by neurohypophysis. Name the disease he is suffering from.
Chapter: [0.09] Control and Co-ordination
Distinguish between
Cerebrum and Cerebellum.
Chapter: [0.09] Control and Co-ordination
When the ELISA test was conducted on an immune-suppressed person, he tested positive for a pathogen.
- Identify the disease the patient is suffering from.
- Name the causative entity.
- Mention the cells of the body that are attacked by the pathogen.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Write chemical reactions to represent Methanogenesis.
Chapter: [0.11] Enhancement of Food Production
What is Recognition sequence? Explain in brief.
Chapter: [0.12] Biotechnology
Explain the role of any three abiotic factors affecting the environment.
Chapter: [0.13] Organisms and Populations [0.14] Ecosystems and Energy Flow
What are ‘pioneer species’? Give two examples of them.
Chapter: [0.14] Ecosystems and Energy Flow
Describe the development of female gametophyte of angiosperms with the help of diagram.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Short Answer Question:
Write a note on applications of DNA fingerprinting.
Chapter: [0.04] Molecular Basis of Inheritance
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
Chapter: [0.05] Origin and Evolution of Life
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
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
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