1. Assertion (A): Bacteria exhibit the most extensive metabolic diversity among all organisms.
Reason (R): Some bacteria are autotrophic,
while others are heterotrophic.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
2.
Which of the following is NOT a characteristic of Archaebacteria?
(a) They live in extreme habitats.
(b) They have a rigid cell wall similar to eubacteria.
(c) They include methanogens found in ruminant animals.
(d) They can survive in high salinity environments.
3.
Match the bacterial shape with its correct name:
|
(i) Spherical |
(A) Bacillus |
|
(ii) Rod-shaped |
(B) Spirillum |
|
(iii) Comma-shaped |
(C) Vibrio |
|
(iv) Spiral |
(D) Coccus |
(a)
(i)-A, (ii)-B, (iii)-C, (iv)-D
(b) (i)-D, (ii)-A, (iii)-C, (iv)-B
(c) (i)-C, (ii)-D, (iii)-A, (iv)-B
(d) (i)-B, (ii)-C, (iii)-D, (iv)-A
4.
Which of the following bacteria is known for fixing atmospheric nitrogen?
(a) Methanogens
(b) Spirillum
(c) Nostoc
(d) Mycoplasma
5.
Assertion (A): Mycoplasma are the smallest living cells known.
Reason (R): Mycoplasma lack a cell wall and
can survive without oxygen.
(a) Both A and R are true, and R is the
correct explanation of A.
(b) Both A and R are true, but R is not the
correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
6.
Which of the following statements about Eubacteria is false?
(a) They have a rigid cell wall.
(b) Some are photosynthetic autotrophs.
(c) They include cyanobacteria.
(d) They completely lack a cell wall.
7.
Assertion (A): Heterotrophic bacteria play a crucial role in nutrient
recycling.
Reason (R): They decompose dead organic
matter.
(a) Both A and R are true, and R is the
correct explanation of A.
(b) Both A and R are true, but R is not the
correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
8.
Which of the following bacteria is responsible for the production of biogas in
ruminant animals?
(a) Cyanobacteria
(b) Halophiles
(c) Thermoacidophiles
(d) Methanogens
9.
Match the bacteria with their associated diseases:
|
(i) Cholera |
(A)
Vibrio cholerae |
|
(ii) Typhoid |
(B)
Clostridium tetani |
|
(iii) Tetanus |
(C) Salmonella typhi |
(iv) Citrus canker |
(D) Xanthomonas axonopodis |
(a) (i)-A, (ii)-C, (iii)-B, (iv)-D
(b) (i)-B, (ii)-A, (iii)-C, (iv)-D
(c) (i)-C, (ii)-B, (iii)-D, (iv)-A
(d) (i)-D, (ii)-C, (iii)-A, (iv)-B
10.
Which of the following types of bacteria can oxidize inorganic substances for
ATP production?
(a) Photosynthetic autotrophic bacteria
(b) Chemosynthetic autotrophic bacteria
(c) Heterotrophic bacteria
(d) Mycoplasma
Answers
1.
(a) Both A and R are true, and R is the correct explanation of A.
2.
(b) They have a rigid cell wall similar to eubacteria.
3.
(b) (i)-D, (ii)-A, (iii)-C, (iv)-B
4.
(c) Nostoc
5.
(a) Both A and R are true, and R is the correct explanation of A.
6.
(d) They completely lack a cell wall.
7.
(a) Both A and R are true, and R is the correct explanation of A.
8.
(d) Methanogens
9.
(a) (i)-A, (ii)-C, (iii)-B, (iv)-D
10.
(b) Chemosynthetic autotrophic bacteria
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