Advertisement

Multiple Choice Questions

Assertion : Saccharomyces cerevisiae produces acetic acid.

Reason : Trichoderma polysporum produces blood cholestrol lowering agent.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are hue but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Which one of the following is a correct statement?

  • "Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology

  • Somatic hybridization involves fusion of two complete plant cells carrying desired genes.

  • The anticoagulant hirudin is being produced from transgenic Brassica napus seeds.

  • "Flavr Savr" variety of tomato has enhanced the production of ethylene which improves its taste.


The first bioherbicide developed in 1981 was based on

  • Phytophthora palmivora

  • Phytophthora infestans

  • Bacillus thuringiensis

  • Azadirachta indica


In transgenics, expression of transgene in target tissue is determined by

  • enhancer

  • transgene

  • promoter

  • reporter.


Advertisement

First clinical gene therapy was given in 1992 to a 4 years old girl for

  • adenine deficiency

  • growth deficiency

  • adenosine deaminase deficiency

  • adenosine deficiency


One of the major difficulties in the biological control of insect pest is that

  • the predator develops a preference to other diets and may itself become a pest

  • the predator does not always survive when transferred to a new environment

  • the method is less effective as compared with the use of insecticides

  • the practical difficulty of introducing the predator to specific areas.


Assertion: A gene from Bacillus thuringiensis is incorporated in plant genome to increase their yield.

Reason: Bacillus thuringiensis has Bt toxin producing gene, which kills the larva of insects

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


In which one of the following combinations (a-d) of the number of chromosomes is the present day hexaploid wheat correctly represented

  • Combination ­ Mono­soic Haploid Nullisomic Trisomic
    (a)  21  28  42  43
  • (b)  28  40  42
  • (c)  21  42  43
  • (d)  41  21  40  43

Advertisement
<

In the following table identify the correct matching of the crop, its disease and the corresponding pathogen.

  • Crop  Disease  Pathogen
    Citrus   Canker Pseudomonas rubrilineans
  • Potato  Late blight  Fusarium udum
  • Brinjal  Root-knot  Meloidogyne incognita
  • Pigeon  pea Seed gall  Phytophthora infestans

Select the correct statement.

  • Acetobacter aceti produces citric acid

  • Saccharomyces cerevisiae is used as clot buster

  • Penicillium notatum restrict the growth of Staphylococci

  • Methanogens are found in aerobic conditions


Advertisement