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Science and Technology 2 Set 1 2019-2020 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

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Science and Technology 2 [Set 1]
Marks: 40 Academic Year: 2019-2020
Date & Time: 18th March 2020, 11:00 am
Duration: 2h
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  1. All questions are compulsory.
  2. Use of calculator is not allowed.
  3. The numbers to the right of the questions indicate full marks.
  4. In case of MCQs [Q. No. 1(A)], only the first attempt will be evaluated and will be given credit.
  5. For every MCQ, the correct alternative (A), (B), (C) or (D) with sub-question number is to be written as an answer.
    For e.g. (i) (A), (ii) (B), (iii) (C).
  6. Scientifically correct, labelled diagrams should be drawn wherever necessary.

[10] 1
[5] 1.A | Choose the correct option and write its number for the following questions.
[1] 1.A.i

Transfer of information from molecules of DNA to mRNA is called as ______ process.

Gene

Mutation

Translocation

Transcription

Gradual development

Appendix

Concept: Evolution and Classiffication
Chapter: [0.01] Heredity and Evolution
[1] 1.A.ii

Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.

Budding

Fragmentation

Regeneration

Binary fission

Concept: Gametogenesis in Animal
Chapter: [0.03] Life Processes in Living Organisms Part - 2
[1] 1.A.iii

Incomplete combustion of fuels leads to formation of _______.

Carbon monoxide

Carbon dioxide

Chlorofluorocarbon

Hydrogen sulphide

Concept: Electric Energy Generation and Environment
Chapter: [0.05] Towards Green Energy
[1] 1.A.iv

The spindle fibres start appearing from _______ stage of karyokinesis.

Prophase

Metaphase

Anaphase

Telophase

Concept: Mitosis and Its Phases
Chapter: [0.02] Life Processes in Living Organisms Part -1
[1] 1.A.v

Salts which can be used as supplement of calcium and iron are obtained from ______ acid.

gluconic acid 

coagulation

amino acid

acetic acid

Clostridium 

Lactobacilli 

Concept: Uses of Microorganisms (Microbes)
Chapter: [0.07] Introduction to Microbiology
[5] 1.B | Solve the following questions.
[1] 1.B.i

Find odd one out:

Drying 

Salting 

Cooking 

Soaking with sugar

Concept: Modern Agricultural Practices and Crop Improvement
Chapter: [0.08] Cell Biology and Biotechnology
[1] 1.B.ii

Write the correct co-relation:

Annelida: Earthworm :: Platyhelminthes: _______

Concept: New Criteria for Basis of Classification
Chapter: [0.06] Animal Classification
[1] 1.B.iii

Tobacco containing substances cannot cause cancer of mouth and lungs.

True

False

Concept: Social Health
Chapter: [0.09] Social Health
[1] 1.B.iv

State the function of Testes.

Concept: Human Reproductive System - Male Reproductive System
Chapter: [0.03] Life Processes in Living Organisms Part - 2
[1] 1.B.v

I am connecting link between Reptilia and mammals. What is my name?

Concept: Kingdom Animalia - Chordata: Vertebrata
Chapter: [0.06] Animal Classification
[10] 2
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[4] 2.A | Give Scientific Reasons. (Any two)
[2] 2.A.i

Indians should follow family planning for controlling the population.

Concept: Reproductive Health
Chapter: [0.03] Life Processes in Living Organisms Part - 2
[2] 2.A.ii

We feel exhausted after exercising.

Concept: Formation of ATP
Chapter: [0.02] Life Processes in Living Organisms Part -1
[2] 2.A.iii

Give scientific reason

Hydroelectric energy, solar energy and wind energy are called renewable energies. 

Concept: Hydroelectric Energy
Chapter: [0.05] Towards Green Energy
[6] 2.B | Solve the following questions. (Any three)
[2] 2.B.i

Complete the following chart:

Concept: Environmental Conservation
Chapter: [0.04] Environmental Management
[2] 2.B.ii

Distinguish between Aves and Mammalia.

Concept: Biological Classification
Chapter: [0.06] Animal Classification
[2] 2.B.iii

By observing the given picture, write any two effects of this disaster:

Concept: Effects of Disaster
Chapter: [0.1] Disaster Management
[2] 2.B.iv

Which are various ways to minimize stress?

Concept: Stress Management
Chapter: [0.09] Social Health
[2] 2.B.v

Complete the following conceptual picture:

Concept: Microorganisms (Microbes) and Microbiology
Chapter: [0.07] Introduction to Microbiology
[15] 3 | Solve the following questions (Any five):
[3] 3.A

Explain the importance of Anatomical evidences with examples.

Concept: Evidence of Organic Evolution
Chapter: [0.01] Heredity and Evolution [0.16] Mapping Our Genes
[3] 3.B
[1] 3.B.i

What will you do? Why?

Child of your neighbor is addicted to tobacco chewing.

Concept: Stress Management
Chapter: [0.09] Social Health
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[1] 3.B.ii

What will you do? Why?

Your friend has developed the hobby of snapping selfies.

Concept: Social Health
Chapter: [0.09] Social Health
[1] 3.B.iii

What will you do? Why?

Your sister has become incommunicative. She prefers to remain alone.

Concept: Social Health
Chapter: [0.09] Social Health
[3] 3.C

Which precautions are necessary for proper decomposition of domestic waste?

Concept: Microorganisms (Microbes) and Microbiology
Chapter: [0.07] Introduction to Microbiology
[3] 3.D

Observe the following diagram. Write the answers of the following questions.

  1. To which phylum does the animal included in the diagram belong?
  2. What is the exoskeleton made up?
  3. What is the symmetry?
Concept: Non Chordates (Invertebrata) - Phylum: Arthropoda
Chapter: [0.06] Animal Classification
[3] 3.E

Explain the following concept in short:

Surrogacy

Concept: Reproduction and Modern Technology
Chapter: [0.03] Life Processes in Living Organisms Part - 2

Explain the following concept in short:

In Vitro Fertilization (IVF)

Concept: Reproduction and Modern Technology
Chapter: [0.03] Life Processes in Living Organisms Part - 2

Explain the following concept in short:

Sperm Bank

Concept: Reproduction and Modern Technology
Chapter: [0.03] Life Processes in Living Organisms Part - 2
[3] 3.F

Label the body organization of human in the following figure:

Concept: New Criteria for Basis of Classification
Chapter: [0.06] Animal Classification
[3] 3.G

Make a table based on forms of energy and corresponding devices:

  Forms of Energy Devices
a. Electric _________
b. Mechanical Sewing machine, Bicycle
c. Thermal __________
d. _________ Solar cooker, Solar heater
Concept: Solar Energy
Chapter: [0.05] Towards Green Energy [0.05] Towards Green Energy
[3] 3.H

Complete the paragraph using proper words:

(Mechanical, Rhizobium, Aquatic, Toxic, CO2, Nitrogen, Pseudomonas, Amoeba, Bacteria, Hydrocarbons)

Spilling of petroleum oil occurs in ocean due to various reasons. This oil may prove fatal and toxic to _______ organisms. It is not easy to remove the oil layer from surface of water by _______ method. However, bacteria like _______ spp. and Alcanivorax borkumensis have the ability to destroy the pyridines and other chemicals. Hence, these _______ are used to clear the oil spills, These are called as hydrocarbonoclastic bacteria (HCB). HCB decompose the _______ and bring about the reaction of carbon with oxygen. _______ and water is formed in this process.

Concept: Uses of Microorganisms (Microbes)
Chapter: [0.07] Introduction to Microbiology
[5] 4 | Solve the following questions (Any one):
[5] 4.A

Attempts at various levels are performed for conserving environment. Which role would you like to perform. Give two actions each:

  • Prevention
  • Control
  • Production
  • Awareness
  • Conservation
Concept: Environmental Conservation
Chapter: [0.04] Environmental Management
[5] 4.B
[1] 4.B.i

What is Biotechnology?

Concept: Biotechnology
Chapter: [0.08] Cell Biology and Biotechnology
[1] 4.B.ii

Give one use of Biotechnology.

Concept: Biotechnology
Chapter: [0.08] Cell Biology and Biotechnology
[1] 4.B.iii

Give one commercial use of Biotechnology.

Concept: Commercial Applications of Biotechnology
Chapter: [0.08] Cell Biology and Biotechnology
[1] 4.B.iv

Write two bacterial examples of biofertilizer.

Concept: Modern Agricultural Practices and Crop Improvement
Chapter: [0.08] Cell Biology and Biotechnology
[1] 4.B.v

Write two names of crops genetically developed.

Concept: Biotechnology
Chapter: [0.08] Cell Biology and Biotechnology

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