A:
Gram-negative
bacteria do not retain the stain when washed with alcohol.
R:
The
outer face of the outer membrance of Grain-negative bacteria contains lipopolysaccharides,
a part of which is integrated into the membrance lipids.
In the following questions a statement of assertion (A) is followed
by a statement of reason (R).
1. If both Assertion & Reason are true
and the reason is the correct explanation of the assertion, then mark (1)
2.
If both Assertion & Reason are true but the reason is not the correct explanation
of the assertion, then mark (2)
3. If Assertion is true statement
but Reason is false, then mark (3)
4. If both Assertion and Reason
are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Â Kingdom Monera: Bacterial Cell Structure |Â Kingdom Monera: Bacterial Classification |
 64%
Level 2: 60%+
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Which of the following statements about dinoflagellates is true?
1. They possess two flagella.
2. All known varieties are autotrophic.
3. Their walls are usually composed of silica plates.
4. Many types lack mitochondria
1. They possess two flagella.
2. All known varieties are autotrophic.
3. Their walls are usually composed of silica plates.
4. Many types lack mitochondria
Subtopic: Â Kingdom Protista: Dinoflagellates |
 82%
Level 1: 80%+
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Match List I with List II
Choose the correct answer from the options given below
1. A-(II), B-(III), C-(IV), D-(I)
2. A-(I), B-(II), C-(III), D-(IV)
3. A-(III), B-(IV), C-(I), D-(II)
4. A-(IV), B-(I), C-(II), D-(III)
| List I | List II |
| A. Prokaryotic | I. Blue-green algae |
| B. Chitinous cell wall | II. Monera |
| C. Organ system | III. Fungi |
| D. N2 fixation | IV. Animalia |
Choose the correct answer from the options given below
1. A-(II), B-(III), C-(IV), D-(I)
2. A-(I), B-(II), C-(III), D-(IV)
3. A-(III), B-(IV), C-(I), D-(II)
4. A-(IV), B-(I), C-(II), D-(III)
Subtopic: Â Kingdom Monera: Introduction |Â Kingdom Fungi: Introduction |
 90%
Level 1: 80%+
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Eubacteria can fix atmospheric nitrogen in specialized cells called
1. Heterocysts
2. Chlorophyll
3. Sporozoan
4. None of the above
1. Heterocysts
2. Chlorophyll
3. Sporozoan
4. None of the above
Subtopic: Â Kingdom Monera: Bacterial Classification |
 95%
Level 1: 80%+
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Which of the following statements is true for viroids?
1. They infect only plants and consist of double-stranded DNA enclosed by protein coat
2. They infect only animals and consist of single-stranded RNA enclosed by protein coat
3. They infect only animals and consist of double-stranded RNA enclosed by protein coat
4. They infect only plants and consist of single stranded RNA not enclosed by protein coat
1. They infect only plants and consist of double-stranded DNA enclosed by protein coat
2. They infect only animals and consist of single-stranded RNA enclosed by protein coat
3. They infect only animals and consist of double-stranded RNA enclosed by protein coat
4. They infect only plants and consist of single stranded RNA not enclosed by protein coat
Subtopic: Â Virus, Viroids & Prions |
 82%
Level 1: 80%+
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Asexual spores are generally NOT found in
1. Ascomycetes
2. Basidiomycetes
3. Zygomycetes
4. Deuteromycetes
1. Ascomycetes
2. Basidiomycetes
3. Zygomycetes
4. Deuteromycetes
Subtopic: Â Kingdom Fungi: Basidomycetes |
 85%
Level 1: 80%+
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Subtopic: Â Kingdom Protista: Dinoflagellates |
 97%
Level 1: 80%+
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | The majority of heterotrophic bacteria are decomposers |
| Statement II: | Bacteria are the sole members of the kingdom Monera |
| 1. | Both statement I and statement II are correct |
| 2. | Both statement I and statement II are incorrect |
| 3. | Statement I is correct but statement II is incorrect |
| 4. | Statement I is incorrect but statement II is correct |
Subtopic: Â Kingdom Monera: Introduction |Â Kingdom Monera: Bacterial Classification |
 89%
Level 1: 80%+
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Mad cow disease in cattle and Cr Jacob disease in humans are due to infection by__________________ .
| 1. | Bacterium | 2. | Virus |
| 3. | Viroid | 4. | Prion |
Subtopic: Â Virus, Viroids & Prions |
 80%
Level 1: 80%+
NEET - 2022
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Carl Woese separated archaebacteria from eubacteria on the basis of major differences such as
(a) The occurrence of branched chain lipids in the membrane.
(b) Absence of peptidoglycan in the cell wall
(c) Chemoautotrophic and heterotrophic modes of nutrition
Choose the correct one(s).
1. (a) and (b)
2. (b) and (c)
3. (a) and (c)
4. All (a), (b) and (c)
(a) The occurrence of branched chain lipids in the membrane.
(b) Absence of peptidoglycan in the cell wall
(c) Chemoautotrophic and heterotrophic modes of nutrition
Choose the correct one(s).
1. (a) and (b)
2. (b) and (c)
3. (a) and (c)
4. All (a), (b) and (c)
Subtopic: Â Kingdom Monera: Bacterial Classification |
 53%
Level 3: 35%-60%
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