Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Important Questions for PUC Karnataka Science Class 12 - Department of Pre-University Education, Karnataka - Biology

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Biology
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Describe the structure of a nucleosome.

Appears in 5 question papers
Chapter: [0.02] Molecular Basis of Inheritance
Concept: Packaging of DNA Helix

Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.

Appears in 4 question papers
Chapter: [0.03] Microbes in Human Welfare
Concept: Microbes in Sewage Treatment

State the fate of a pair of autosomes during gamete formation.

Appears in 3 question papers
Chapter: [0.01] Reproduction in Organisms
Concept: Events in Sexual Reproduction in Organisms > Pre-fertilisation Events in Organisms

Suggest a method to ensure an anamnestic response in humans.

Appears in 3 question papers
Chapter: [0.01] Human Health and Diseases
Concept: Immunity

During a medical investigation, an infant was found to possess an extra  chromosome-21. Describe the symptoms the child is likely to develop later in the life.

Appears in 3 question papers
Chapter: [0.01] Principles of Inheritance and Variation
Concept: Genetic Disorders

During a medical investigation, an infant was found to possess an extra  chromosome-21. Describe the symptoms the child is likely to develop later in the life.

Appears in 3 question papers
Chapter: [0.01] Principles of Inheritance and Variation
Concept: Genetic Disorders

Write the steps you would suggest to be undertaken to obtain a foreign-gene-product.

Appears in 3 question papers
Chapter: [0.01] Biotechnology - Principles and Processes
Concept: Tools of Recombinant DNA Technology > Competent Host (For Transformation with Recombinant DNA)

What is an age-pyramid?

Appears in 3 question papers
Chapter: [0.01] Organisms and Populations
Concept: Population > Population Attributes

A number of passengers were severely burnt beyond recognition during a train accident. Name and describe a modern technique that can help hand over the dead to their relatives.

Appears in 3 question papers
Chapter: [0.02] Molecular Basis of Inheritance
Concept: DNA Fingerprinting Technique

Explain the importance of "selection" during inbreeding in cattle

Appears in 3 question papers
Chapter: [0.02] Strategies for Enhancement in Food Production
Concept: Animal Husbandry (Livestock)

Explain the role of Restriction endonuclease in Biotechnology

Appears in 3 question papers
Chapter: [0.02] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application

Explain the role of the Gel − electrophoresis in Biotechnology

Appears in 3 question papers
Chapter: [0.02] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application

Explain the role of the Selectable markers in pBR322 in Biotechnology.

Appears in 3 question papers
Chapter: [0.02] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application

Why do lepidopterans die when they feed on Bt cotton plant? Explain how does it happen.

Appears in 3 question papers
Chapter: [0.02] Biotechnology and Its Application
Concept: Biotechnological Applications in Agriculture

Discuss the role of healthy ecosystem services as a pre-requisite for a wide range of economic, environmental and aesthetic goods and services

Appears in 3 question papers
Chapter: [0.02] Ecosystem
Concept: Ecosystem Services

Mention the evolutionary significance of the Shrews

Appears in 3 question papers
Chapter: [0.03] Evolution
Concept: Evolution of Life Forms - a Theory

Mention the evolutionary significance of the Lobefins

Appears in 3 question papers
Chapter: [0.03] Evolution
Concept: Evolution of Life Forms - a Theory

Mention the evolutionary significance of the Homo habilis

Appears in 3 question papers
Chapter: [0.03] Evolution
Concept: Evolution of Life Forms - a Theory

p2 + 2pq + q2 = 1. Explain this algebraic equation on the basis of Hardy Weinberg's principle.

Appears in 3 question papers
Chapter: [0.03] Evolution
Concept: Hardy Weinberg’s Principle

'in-situ' Conservation can help endangered/threatened species. Justify the statement.

Appears in 3 question papers
Chapter: [0.03] Biodiversity and Its Conservation
Concept: Conservation of Biodiversity
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