Biology — Quiz

Biology MCQS[NEET-2021 to 2022]-Microorganisms

50 questions · Test your knowledge

1 What is true about Archaebacteria?
2 The Ti plasmid is often used for making transgenic plants. This plasmid is found in
3 Reproduction in most of the bacteria is by a process known as
4 An example of endomycorrhizal is
5 Human insulin is being commercially produced from a transgenic species of
6 Specialized cells called heterocysts are present in
7 The Gram negative bacteria detect and respond to chemicals in their surrounding by
8 Which of the following protects the bacteria from the enzymes present in the external medium?
9 A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably above to form
10 Which one of the following is correct about Cosmid?
11 Which of the following groups of organisms are ecologically similar?
12 A bacterium which is capable of utilizing the most abundantly available gas in the atmosphere for one of its metabolic pathways, but cannot utilize the second most abundantly available for its another
13 Identify the correct pair of events when temperate phages infect bacteria : (I) No prophages are formed. (II) Bacterial cell undergoes many divisions (III) Bacterial cell undergoes immediate lysis
14 Which type of DNA is found in bacteria?
15 Plasmids are most often found in
16 Cell wall of Gram positive bacteria is made up of
17 Bacteria with flagella all over the body is
18 Which of the following is a free living nitrogen fixing bacterium present in the soil?
19 An example for symbiotic bacteria
20 The asexual spores formed by Colletotrichum falcatum, Sphaerotheca and Rhizopus stolonifer are
21 The bacterium (Clostridium botulinum) that causes botulism is
22 Red rot disease of sugarcane is caused by
23 Certain bacteria living in the soil poor in oxygen, convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as
24 Chromosomes in a bacterial cell can be 1 - 3 in number and
25 N-acetylmuramic acid is found in
26 dsRNA is found in
27 Which one of the followings is a viral disease?
28 Cauliflower mosaic virus contains
29 ELISA is used to detect viruses where the key reagent is
30 Due to discovery of which of the following in 1980, the evolution was termed as RNA world
31 Tailed bacteriophages are
32 One important characteristic of viruses is that they
33 Virus are living, because
34 DNA is not present in one of the following
35 Which of the following statements is not true for retroviruses?
36 Viruses are no more "alive" than isolated chromosomes because
37 Which statement is correct for bacterial transduction?
38 Which of the following statements is true about viruses?
39 How does enveloped virus enter into host cells?
40 The genetic material in virus is
41 Protein coat of a virus enclosing nucleic acid is called
42 The Phages that show lysogenic cycle are called
43 Which one of the following enzymes is present in the bacteriophage?
44 Which one of the following viruses contains both DNA and RNA?
45 Bacteriophages kill
46 Virus multiplies in
47 Provirus is _____.
48 The non-living characteristic of viruses is
49 A T-series bacteriophage can be recognized by its
50 In AIDS, HIV kills
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