Karnataka Board PUCPUC Science 2nd PUC Class 12

PUC Science 2nd PUC Class 12 - Karnataka Board PUC Important Questions for Biology

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Biology
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Describe the structure of a nucleosome.

Appears in 5 question papers
Chapter: [0.05] 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: [0.08] 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

Our government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.

Appears in 3 question papers
Chapter: [0.03] Reproductive Health
Concept: Reproductive Health

Plenty of algal bloom is observed in a pond in your locality.

(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.

Appears in 3 question papers
Chapter: [0.04] Environmental Issues
Concept: Introduction of Water Pollution and Its Control

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: [0.04] Principles of Inheritance and Variation
Concept: Genetic Disorders

Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident's Welfare Association of your locality organized an awareness programme entitled "Bury not burn". They invited you, being a biology student to participate.

(a) How would you justify your arguments that promote burying and discourage burning? (Give two reasons)

(b) With the help of flow charts, one for each practice depict the chain of events that follow.

Appears in 3 question papers
Chapter: [0.04] Environmental Issues
Concept: Effects of Domestic Sewage and Industrial Effluents on Water

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: [0.05] Molecular Basis of Inheritance
Concept: DNA Fingerprinting Technique

Mention the evolutionary significance of the Shrews

Appears in 3 question papers
Chapter: [0.06] Evolution
Concept: Evolution of Life Forms - a Theory

Mention the evolutionary significance of the Lobefins

Appears in 3 question papers
Chapter: [0.06] Evolution
Concept: Evolution of Life Forms - a Theory

Mention the evolutionary significance of the Homo habilis

Appears in 3 question papers
Chapter: [0.06] 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: [0.06] Evolution
Concept: Hardy Weinberg’s Principle

How do the observations made during moth collection in pre- and post- industrialized era in England support evolution by Natural Selection?

Appears in 3 question papers
Chapter: [0.06] Evolution
Concept: Theories of Biological Evolution > Darwin’s Theory of Natural Selection

Explain the phenomenon that is well represented by Darwin's finches other than natural selection.

Appears in 3 question papers
Chapter: [0.06] Evolution
Concept: Theories of Biological Evolution > Darwin’s Theory of Natural Selection

Suggest a method to ensure an anamnestic response in humans.

Appears in 3 question papers
Chapter: [0.07] Human Health and Diseases
Concept: Immunity

Explain the importance of "selection" during inbreeding in cattle

Appears in 3 question papers
Chapter: [0.08] Strategies for Enhancement in Food Production
Concept: Animal Husbandry (Livestock)

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

Appears in 3 question papers
Chapter: [0.09] Biotechnology - Principles and Processes
Concept: Tools of Recombinant DNA Technology > Competent Host (For Transformation with Recombinant DNA)

Explain the role of Restriction endonuclease in Biotechnology

Appears in 3 question papers
Chapter: [0.1] 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: [0.1] 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: [0.1] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application
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