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Tamil Nadu Board of Secondary EducationHSC Science कक्षा १२

HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

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How sex is determined in monoecious plants. write their genes involved in it.

[3] Chromosomal Basis of Inheritance
Chapter: [3] Chromosomal Basis of Inheritance
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Restriction enzymes are

[4] Principles and Processes of Biotechnology
Chapter: [4] Principles and Processes of Biotechnology
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Consider the following statements:

  1. Recombinant DNA technology is popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic materials by man invitro
  2. pBR322 is the first artificial cloning vector developed in 1977 by Boliver and Rodriguez from E.coli plasmid
  3. Restriction enzymes belong to a class
    of enzymes called nucleases. Choose the correct option regarding the above statements
[4] Principles and Processes of Biotechnology
Chapter: [4] Principles and Processes of Biotechnology
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Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzymes?

[4] Principles and Processes of Biotechnology
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What are the enzymes you can use to cut the terminal end and internal phospho di ester bond of nucleotide sequence?

[4] Principles and Processes of Biotechnology
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Name the chemicals used in gene transfer.

[4] Principles and Processes of Biotechnology
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What is a restriction enzyme? Mention their type with a role in Biotechnology.

[4] Principles and Processes of Biotechnology
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How will you identify a vectors?

[4] Principles and Processes of Biotechnology
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Match column I (crop) with column II (Corresponding disease-resistant variety) and select the correct option from the given codes.

Column I Column II
I) Cowpea i) Himgiri
II) Wheat ii) Pusa Komal
III) Chilli iii) Pusa Sadabahar
IV) Brassica iv) Pusa Swarnim
[9] Plant Breeding
Chapter: [9] Plant Breeding
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Match List I with List II

List I List II
Biofertilizer Organisms
i) Free-living N2 a) Aspergillus
ii) Symbiotic N2 b) Amanita
iii) P Solubilizing c) Anabaena azollae
iv) P Mobilizing d) Azotobactor
[9] Plant Breeding
Chapter: [9] Plant Breeding
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How are microbial innoculants used to increase soil fertility?

[9] Plant Breeding
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An eminent Indian embryologist is

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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The scar left by funiculus in the seed is

[1] Asexual and Sexual Reproduction in Plants
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Ruminate endosperm is found in

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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Coelorhiza is found in

[1] Asexual and Sexual Reproduction in Plants
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Parthenocarpic fruits lack

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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Mention the contribution of Hofmeister towards Embryology.

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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Highlight the milestones from the history of plant embryology.

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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‘The endosperm of angiosperm is different from gymnosperm’. Do you agree? Justify your answer.

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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Define the term Diplospory.

[1] Asexual and Sexual Reproduction in Plants
Chapter: [1] Asexual and Sexual Reproduction in Plants
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