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Biology (Theory) Paper 1 2013-2014 ISC (Arts) Class 12 Question Paper Solution

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Biology (Theory) [Paper 1]
Marks: 70Academic Year: 2013-2014
Date: March 2014

Question 1 is Compulsory

Attempt Any Two Question From Question 2 to Question 4

Attempt Any Two Question From Question 5 to Question 7

Attempt Any Two Question From Question 8 to Question 10


[20]1
[5]1.1

Mention one significant difference between Parenchyma and Sclerenchyma.

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production

Mention one significant difference between Epistasis and dominance

Concept: Deviations from Mendelism - Incomplete Dominance, Co-dominance, Multiple Alleles and Inheritance of Blood Groups, Pleiotropy
Chapter: [2.01] Principles of Inheritance and Variation

Mention one significant difference between Hormones of ovulatory phase and hormones of luteal phase

Concept: Menstrual Cycle
Chapter: [1.03] Human Reproduction

Mention one significant difference between Symplastic movement and apoplastic movement

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production

Mention one significant difference between Phenotype and Genotype

Concept: Search for Genetic Material - Introduction of Search for Genetic Material
Chapter: [2.02] Molecular Basis of Inheritance
[5]1.2

Give reasons for the following:

Testes descend into the scrotum before birth.

Concept: Microscopic Anatomy of Testis
Chapter: [1.03] Human Reproduction

Give reasons for the following:

Secondary growth does not occur in monocot stems.

Concept: Pre-fertilisation - Structures and Events - Stamen, Microsporangium and Pollen Grain
Chapter: [1.02] Sexual Reproduction in Flowering Plants

Give reasons for the following:

Nitrogenous fertilizers are not applied in fields where leguminous crops grow.

Concept: Microbes as Biocontrol Agents
Chapter: [3.03] Microbes in Human Welfare

Give reasons for the following:

The genetic code is 'universal'

Concept: Search for Genetic Material - Introduction of Search for Genetic Material
Chapter: [2.02] Molecular Basis of Inheritance

Give reasons for the following:

At higher temperatures, green plants start evolving CO2 instead of O2.

Concept: Introduction and Types of Ecosystem
Chapter: [5.02] Ecosystem
[5]1.3

In the following questions/statements has four suggested answers. Rewrite the correct answer

Typhoid is classified as a:

(A) Viral disease

(B) Genetic disorder

(C) Bacterial disease

(D) Protozoan disease

Concept: Common Diseases in Humans
Chapter: [3.01] Human Health and Diseases

In the following questions/statements has four suggested answers. Rewrite the correct answer

Bt cotton is resistant to:

(A) Insects

(B) Herbicides

(C) Salt

(D) Drought

Concept: Biotechnological Applications in Agriculture
Chapter: [4.02] Biotechnology and Its Applications

In the following questions/statements has four suggested answers. Rewrite the correct answer

Roots and shoots lengthen through the activity of:

(A) Apical meristem

(B) Vascular Cambium

(C) Lateral meristem

(D) Cork Cambium

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production

In the following questions/statements has four suggested answers. Rewrite the correct answer

An antiviral protein released from infected and dying cells is:

(A) Antigen

(B) Antibody

(C) Antiserum

(D) Interferon

Concept: Concept of Immunity
Chapter: [3.01] Human Health and Diseases

In the following questions/statements has four suggested answers. Rewrite the correct answer

Opening and closing of stomata is due to:

(A) Ca2+

(B) Na+

(C) K+

(D) Cl–

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production
[3]1.4

State the best-known contribution of Alec Jeffery

Concept: DNA Fingerprinting
Chapter: [2.02] Molecular Basis of Inheritance

State the best-known contribution of P.K. Sethi

Concept: Biotechnological Applications in Medicine
Chapter: [4.02] Biotechnology and Its Applications

State the best-known contribution of Hugo de Vries

Concept: Gene Flow and Genetic Drift
Chapter: [2.03] Evolution
[2]1.5

Expand the following: SCID

Concept: Concept of Immunity
Chapter: [3.01] Human Health and Diseases

Expand the following: ZIFT

Concept: Infertility
Chapter: [1.04] Reproductive Health
[5]2
[3]2.1

Describe the Miller and Urey experiment on the origin of life

Concept: Origin of Life
Chapter: [2.03] Evolution
[2]2.2

Define Frameshift mutations

Concept: Search for Genetic Material - Introduction of Search for Genetic Material
Chapter: [2.02] Molecular Basis of Inheritance

Define Genetic drift.

Concept: Gene Flow and Genetic Drift
Chapter: [2.03] Evolution
[5]3
[3]3.1

Name and define the three types of natural selection.

Concept: Darwin'S Contribution
Chapter: [2.03] Evolution
[2]3.2

State the following:

Hardy Weinberg’s principle

Concept: Hardy - Weinberg'S Principle
Chapter: [2.03] Evolution

State the following:

Theory of recapitulation

Concept: Modern Synthetic Theory of Evolution
Chapter: [2.03] Evolution
[5]4
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[3]4.1

Mention any three characteristics of Neanderthal man that lived in near east and central Asia.

Concept: Origin and Evolution of Man
Chapter: [2.03] Evolution
[2]4.2

What are homologous organs?

Concept: Evidences for Evolution
Chapter: [2.03] Evolution

How do homologous organs help in providing evidence for organic evolution?

Concept: Evidences for Evolution
Chapter: [2.03] Evolution
[10]5
[4]5.1

Describe the different types of vascular bundles.

Concept: Pre-fertilisation - Structures and Events - Stamen, Microsporangium and Pollen Grain
Chapter: [1.02] Sexual Reproduction in Flowering Plants
[3]5.2

Give three anatomical differences between a monocot root and a dicot root

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production
[3]5.3

Explain the effect of light and temperature on photosynthesis.

Concept: Plant Breeding
Chapter: [3.02] Strategies for Enhancement in Food Production
[10]6
[4]6.1

Explain the transpiration pull theory for an ascent of sap

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production
[3]6.2

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Concept: Gametogenesis
Chapter: [1.03] Human Reproduction
[3]6.3

Define Placentation

Concept: Fertilisation and Implantation
Chapter: [1.03] Human Reproduction

Define Parthenocarpy

Concept: Significance of Seed Dispersal and Fruit Formation
Chapter: [1.02] Sexual Reproduction in Flowering Plants

Define Diffusion

Concept: Energy Flow
Chapter: [5.02] Ecosystem
[10]7
[4]7.1

Why are xylem and phloem classified as complex tissues?

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production

Describe the structure of phloem.

Concept: Tissue Culture
Chapter: [3.02] Strategies for Enhancement in Food Production
[3]7.2

Describe the ultra-structure of a chloroplast.

Concept: Single Cell Protein (SCP)
Chapter: [3.02] Strategies for Enhancement in Food Production
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[3]7.3

State three functions of the placenta

Concept: Fertilisation and Implantation
Chapter: [1.03] Human Reproduction
[10]8
[4]8.1

Describe the experiment performed by Griffith. What conclusions did he infer from his observations?

Concept: Search for Genetic Material - Introduction of Search for Genetic Material
Chapter: [2.02] Molecular Basis of Inheritance
[3]8.2

What is artificial insemination? Mention two ways in which it is useful in the breeding of dairy animals

Concept: Animal Husbandry
Chapter: [3.02] Strategies for Enhancement in Food Production
[3]8.3

What is single cell protein? Give its source and significance

Concept: Single Cell Protein (SCP)
Chapter: [3.02] Strategies for Enhancement in Food Production
[10]9
[4]9.1

How did Hershey and Chase prove that DNA is the genetic material?

Concept: Search for Genetic Material - Introduction of Search for Genetic Material
Chapter: [2.02] Molecular Basis of Inheritance
[3]9.2

Give one main application of MRI

Concept: Infectious and Non Infectious Disease
Chapter: [3.01] Human Health and Diseases

Give one main application of Ultrasound

Concept: Infectious and Non Infectious Disease
Chapter: [3.01] Human Health and Diseases

Give one main application of ECG

Concept: Infectious and Non Infectious Disease
Chapter: [3.01] Human Health and Diseases
[3]9.3

Explain the role of stem cells in medical treatment.

Concept: Stem Cell Technology
Chapter: [4.02] Biotechnology and Its Applications
[10]10
[4]10.1

Write short notes on Multiple Alleles

Concept: Gene Flow and Genetic Drift
Chapter: [2.03] Evolution

Write short notes on Artificial measures to control population

Concept: Population Explosion and Birth Control
Chapter: [1.04] Reproductive Health
[3]10.2

What complications will arise if the blood of an Rh-positive person is transfused to an Rh-negative person and vice versa?

Concept: Common Diseases in Humans
Chapter: [3.01] Human Health and Diseases

State any three goals of the human genome project

Concept: Human Genome Project
Chapter: [2.02] Molecular Basis of Inheritance
[3]10.3

State any three goals of the human genome project

Concept: Human Genome Project
Chapter: [2.02] Molecular Basis of Inheritance
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CISCE previous year question papers Class 12 Biology (Theory) with solutions 2013 - 2014

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