Miscellaneous Questions Test

Miscellaneous Questions

This is online test 03 for CBSE class 12 Biology Microbes in Human Welfare (Miscellaneous Questions).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Virus that kills bacteria are called
  • A
    Saprophytes
  • B
    Bacteriophage
    Correct
  • C
    Macrophage
  • D
    Microphage
2
What is the common name of Drosophila melanogaster?
  • A
    Zebrafish
  • B
    Chlamydia
  • C
    Roundworm
  • D
    Fruit fly
    Correct
3
The bacteria which grows anaerobically on cellulose material and produces large amount of methane along with \(C{O_2}\) and \({H_2}\) are collectively called
  • A
    Cellulosed bacteria
  • B
    Methanogens
    Correct
  • C
    Anaerobic bacteria
  • D
    Methane bacteria
4
Bacterial leaf blight of rice is caused by a species of
  • A
    Envinia
  • B
    Xanthomonas
    Correct
  • C
    Alternaria
  • D
    Pseudomonas
5
Which kingdoms among the living organism contain only micro-organisms?
  • A
    Monera and Protista
    Correct
  • B
    All of these
  • C
    Monera and Fungi
  • D
    Fungi and Protista
6
Semi-conservative replication of DNA was first demonstrated in
  • A
    Drosophila melanogaster
  • B
    Salmonella typhimurium
  • C
    Escherichia coli
    Correct
  • D
    Streptococcus pneumoniae
7
Which of the following microbes cannot be grown into nutritive media?
  • A
    Fungi
  • B
    Bacteria
  • C
    Virus
    Correct
  • D
    Yeast
8
A symbiotic relationship/interaction in which 'one species benefits and the other species is not affected' is called
  • A
    Ectomycorrhizae
  • B
    Helotism
  • C
    Commensalisms
    Correct
  • D
    Endomycorrhizae
9
Human insulin is being commercially produced from a transgenic species of
  • A
    Escherichia
    Correct
  • B
    Mycobacterium
  • C
    Rhizobium
  • D
    Lactobacillus
10
Crop rotation is used by farmers to increase
  • A
    Soil fertility
    Correct
  • B
    All of these
  • C
    Organic content of soil
  • D
    Nitrogenous content of soil