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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

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Write a short note on wetland.

[15] Biodiversity, Conservation and Environmental Issues
Chapter: [15] Biodiversity, Conservation and Environmental Issues
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What is EcoRI?

[12] Biotechnology
Chapter: [12] Biotechnology
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How does EcoRI differ from an exonuclease?

[12] Biotechnology
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Name the enzyme responsible for the transcription of genetic code to produce mRNA.

[12] Biotechnology
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Which amino acid is coded by the initiation codon?

[12] Biotechnology
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Explain the mechanism of PCR.

[12] Biotechnology
Chapter: [12] Biotechnology
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Importance of PCR.

[12] Biotechnology
Chapter: [12] Biotechnology
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Which among the following cells in human has 23 chromosomes?

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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What are A, B in the following table:

Transgenic Crop Substance Transgene
(i) A Flavonoids Chalone isomerase
(ii) Rice B Ferritin
[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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Name the enzymes that are called molecular scissors.

[12] Biotechnology
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In vitro amplification of DNA segments is called______.

[12] Biotechnology
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Expand YAC used in the field of Biotechnology.

[12] Biotechnology
Chapter: [12] Biotechnology
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Sketch and lable - Unfertilized egg.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
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Match the following:

Sr. No. Column I   Column II
(i) Eutrophication (a) A soil erosion
(ii) Biomagnification (b) carbon monoxide, methane
(iii) Particulate pollutant (c) Prevention of extinction
(iv) Conservation (d) Dust, smog
(v) Gaseous pollutants (e) Accumulation of nonbiodegradable
substances
(vi) Deforestation (f) Death of aquatic ecosystem
[11] Enhancement of Food Production
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What is 'tissue culture'?

[11] Enhancement of Food Production
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Describe the methodology of tissue culture.

[11] Enhancement of Food Production
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With the help of a suitable diagram, describe the conducting system of the human heart.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Explain micropropagation and somatic hybridization.

[11] Enhancement of Food Production
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What is photorespiration?

[7] Plant Growth and Mineral Nutrition
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Give the significance of respiration

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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