Biotechnological Applications In Agriculture Test

Biotechnological Applications In Agriculture

This is online test 03 for CBSE class 12 Biology Biotechnology and its Applications (Biotechnological Applications in Agriculture).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Cry toxin is released from the crystal in the insect gut as
  • A
    Due to the binding with the receptors
  • B
    Alkaline medium renders it soluble and amenable by proteases
    Correct
  • C
    Due to sporulation
  • D
    Alpha endotoxins are potent
2
Biotechnology has advantages over conventional breeding as
  • A
    It is less time consuming
    Correct
  • B
    It is selective breeding
  • C
    Growth rate is less
  • D
    Growth rate is more but milk production is less
3
Which of the following methods should be used to increase crop production without use of chemicals and fertilizers?
  • A
    Use of more water
  • B
    Use of organic fertilizers
  • C
    Use of ancient technique of agriculture
  • D
    Use of genetically modified crops
    Correct
4
Gene encoding hirudin is synthesized to
  • A
    to increase sugar level in blood
  • B
    to decrease stress
  • C
    to prevent high blood pressure
  • D
    Prevent blood clotting
    Correct
5
Bacillus thuringiensis gives a positive result with gram stain , therefore this bacteria is
  • A
    eukaryotic
  • B
    slime mould
  • C
    Gram positive
    Correct
  • D
    Gram negative
6
Cry IAb is not effective against the cotton bollworm as cry genes are
  • A
    The parasporal crystals remain inactive in bollworm
  • B
    Specific
    Correct
  • C
    With less nucleotides
  • D
    With No antibiotic resistance
7
Bt toxins lead to swelling and lysis of the pores of the epithelial lining as
  • A
    due to endosmosis
  • B
    it binds to the receptors on the gut
    Correct
  • C
    it interacts with the ATP pumps in the wall
  • D
    toxins are specific
8
Cry genes can be transferred as they are present in
  • A
    Plasmid
    Correct
  • B
    nucleoid
  • C
    membrane
  • D
    mitochondria
9
Assertion: Bacillus thuringiensis forms protein crystals during particular phase of growth. Reason: These crystals contain a toxic insecticidal protein that kills the certain insects.
  • A
    Both assertion and reason are incorrect
  • B
    Assertion is correct but reason is incorrect.
  • C
    Assertion is not explained by reason
  • D
    Both assertion and reason are correct.
    Correct
10
Statement I: Genetically modified plants are more tolerant to abiotic stress. Statement II: GM plants enhance nutritional value of food. Statement III: GM plants products are carcinogenic.
  • A
    All statements are incorrect
  • B
    Only statement II and III are correct
  • C
    Only statement I and II is correct
    Correct
  • D
    Only statement I and III are correct