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HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Biology

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Biology
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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
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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
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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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How does the water come out through the surface of porous earthen pot?

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
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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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The number of purines in a segment of a DNA molecule is 68. What will be the number of pyrimidines in this segment?

[5] Origin and Evolution of Life
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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
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Describe different steps involved in tissue culture technique

[11] Enhancement of Food Production
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Attempt any TWO of the following:

Enlist the applications of tissue culture.

[11] Enhancement of Food Production
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Describe any ‘two’ applications of tissue culture technique.

[11] Enhancement of Food Production
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A collection of neuron cell bodies located outside the CNS is called _________.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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