Karnataka Board PUCPUC Science 2nd PUC Class 12

PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions

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

[0.04] Reproductive Health
Chapter: [0.04] Reproductive Health
Concept: Reproductive Health

List the three states the annuals and biennial angiosperms have to pass through during their life cycle.

[0.02] Sexual Reproduction in Flowering Plants
Chapter: [0.02] Sexual Reproduction in Flowering Plants
Concept: Flower - a Fascinating Organ of Angiosperms

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By taking two examples explain how has bio-fortification helped in improving food quality.

[0.02] Strategies for Enhancement in Food Production
Chapter: [0.02] Strategies for Enhancement in Food Production
Concept: Introduction of Strategies for Enhancement in Food Production

In a flowering plant a microspore mother cell produces four male gametophytes while a megapore mother cell forms only one female gametophyte. Explain

[0.02] Sexual Reproduction in Flowering Plants
Chapter: [0.02] Sexual Reproduction in Flowering Plants
Concept: Flower - a Fascinating Organ of Angiosperms

Read the statement and answer the questions that follow.

A flower of brinjal has 520 ovules in its ovary. However, it produces a fruit with only 480 viable seeds.

(a) What could have prevented the rest of the 40 ovules from maturing into viable seeds? Explain giving a reason.

(b) Describe the development of a dicot embryo in a viable seed.

(c) Why certain angiospermic seed albuminous while others are exalbuminous? Explain.

[0.02] Sexual Reproduction in Flowering Plants
Chapter: [0.02] Sexual Reproduction in Flowering Plants
Concept: Flower - a Fascinating Organ of Angiosperms

A capsicum flower has 240 ovules in its ovary. But, it produces a fruit with only 180 viable seeds.
 

Explain giving a reason that could be responsible for such a result.
[0.02] Sexual Reproduction in Flowering Plants
Chapter: [0.02] Sexual Reproduction in Flowering Plants
Concept: Flower - a Fascinating Organ of Angiosperms

Bottled fruit juices are clearer as compared to those made at home. Explain.

 

 
[0.02] Strategies for Enhancement in Food Production
Chapter: [0.02] Strategies for Enhancement in Food Production
Concept: Introduction of Strategies for Enhancement in Food Production

Name the kind of diseases/disorders that are likely to occur in humans if
    (i) mutation in the gene that codes for an enzyme phenyl alanine hydrolase occurs,
    (ii) there is an extra copy of chromosome 21,
    (iii) the karyotype is XXY.

[0.04] Reproductive Health
Chapter: [0.04] Reproductive Health
Concept: Reproductive Health

Mention any one symptom of the diseases/disorders named above.

 

 
[0.04] Reproductive Health
Chapter: [0.04] Reproductive Health
Concept: Reproductive Health

What is inbreeding depression?

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

Explain the importance of "selection" during inbreeding in cattle

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

Explain the role of Restriction endonuclease in Biotechnology

[0.02] Biotechnology and Its Application
Chapter: [0.02] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application

Explain the role of the Gel − electrophoresis in Biotechnology

[0.02] Biotechnology and Its Application
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.

[0.02] Biotechnology and Its Application
Chapter: [0.02] Biotechnology and Its Application
Concept: Introduction of Biotechnology and Its Application

Show with the help of a flow chart only, the life cycle of malarial parasite in humans.

[0.01] Human Health and Diseases
Chapter: [0.01] Human Health and Diseases
Concept: Common Diseases in Human Beings

How does a desert plant adapt to the dry, warmer environmental conditions ?

[0.04] Environmental Issues
Chapter: [0.04] Environmental Issues
Concept: Environmental Issues

One of the major contributions of biotechnology is to develop pest-resistant varieties of cotton plants. Explain how it has been made possible.

 

 
[0.01] Biotechnology - Principles and Processes
Chapter: [0.01] Biotechnology - Principles and Processes
Concept: Process and Principles of Biotechnology

How can sewage be used to generate biogas ? Explain.

[0.03] Microbes in Human Welfare
Chapter: [0.03] Microbes in Human Welfare
Concept: Microbes in Human Welfare

Name and explain the technique used for separating DNA fragments and making them available for biotechnology experiments.

[0.01] Biotechnology - Principles and Processes
Chapter: [0.01] Biotechnology - Principles and Processes
Concept: Process and Principles of Biotechnology

Differentiate between Vas deferens and vasa efferentia.

[0.03] Human Reproduction
Chapter: [0.03] Human Reproduction
Concept: Human Reproductive System > The Male Reproductive System
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