Monera Questions
1. Assertion: Prokaryotic chromosome differs from a eukaryotic one by the absence of histone proteins
Reason: Bacterial cell is a prokaryote
(a) If both the assertion and the reason are true and the reason is an incorrect explanation of the assertion
(b) If both the assertion and the reason are true and the reason is correct explanation of the assertion
(c) If the assertion is true, the reason is false
(d) if both the assertion and the reason are false
Answer:: (b)
2. The gram-negative bacteria detect and respond to chemicals in their surroundings by
(a) Muramic acid
(b) Porins
(c) Lipopolysaccharide
(d) Volutin granule
Answer:: (b)
3. The reason why bacteria lack alternation of generation is
(a) distinct chromosomes are present
(b) neither syngamy nor reductional division
(c) no exchange of genetic material
(d) no conjugation
Answer:: (b)
4. This is a free-living aerobic non-photosynthetic nitrogen-fixing bacterium
(a) Azospirillium
(b) Nostoc
(c) Rhizobium
(d) Azotobacter
Answer:: (d)
5. Photosynthetic bacteria have pigments in
(a) Chromoplasts
(b) Chloroplasts
(c) Leucoplasts
(d) Chromatophore
Answer:: (d)
6. Difference in gram-positive and gram-negative bacteria is due to
(a) ribosome
(b) cell membrane
(c) cytoplasm
(d) cell wall
Answer:: (d)
7. During the replication of a bacterial chromosome, DNA synthesis begins from a replication origin site and
(a) is facilitated by telomerase
(b) RNA primers are involved
(c) moves in a bi-directional way
(d) moves in one direction of the site
Answer:: (c)
8. The fermenting microbe used for retting of jute is
(a) Helicobactor pylori
(b) methanophilic bacteria
(c) butyric acid bacteria
(d) Streptococcus lactin
Answer:: (c)
9. This statement about mycoplasma is incorrect
(a) they are sensitive to penicillin
(b) they are pleomorphic
(c) they cause diseases in plants
(d) they are also called PPLO
Answer:: (a)
10. For bacterial transduction, which of these statements is correct?
(a) transfer of genes from one to another bacteria by conjugation
(b) transfer of some genes from one to another bacteria through virus
(c) bacteria obtained DNA from other external sources
(d) bacteria obtain its DNA from the mother cell
Answer:: (b)
