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

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How t-RNA act as an adapter molecule?
Explain in detail with the help of a diagram.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Define mutation. State its two types.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Draw a neat and labelled diagram of transcription and processing of hn-RNA

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Describe the mechanism of translation with the help of neat and labelled diagram.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Define cross-breeding.

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
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Complete the following flow diagram of double circulation:

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Write the mode of transmission of typhoid.

[10] Human Health and Diseases
Chapter: [10] Human Health and Diseases
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Give the symptoms of typhoid.

[10] Human Health and Diseases
Chapter: [10] Human Health and Diseases
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Describe the process of transcription.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Give scientific reason.

Closed circulation is more efficient than open circulation.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Draw flow chart of Central Dogma.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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What is meant by the polarity of genetic code ?

[4] Molecular Basis of Inheritance
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If the base sequence in DNA is 5' AAAA 3', then the base sequence in nillNA is______.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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What is the role of ribosomes in protein synthesis?

[4] Molecular Basis of Inheritance
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DNA is not involved directly in the synthesis of______.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Name the anticodon of the tRNA that carries the above amino acid.

[4] Molecular Basis of Inheritance
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Write a note on closed circulation.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
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Differentiate between m-RNA, t-RNA and r-RNA.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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Give the different steps involved in formation of m-RNA from hn-RNA.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
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What is ecological succession?

[14] Ecosystems and Energy Flow
Chapter: [14] Ecosystems and Energy Flow
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