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 |
 59%
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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 |
 79%
From NCERT
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Match List I with List II
Choose the correct answer from the options given below
1. A-(I), B-(II), C-(III), D-(IV)
2. A-(II), B-(III), C-(IV), D-(I)
3. A-(III), B-(IV), C-(II), D-(I)
4. A-(IV), B-(I), C-(II), D-(III)
| List I | List II |
| A. Zearalenone | I. Penicillium viridicatum |
| B. Trichothecenes | II. Fusarium moniliforme |
| C. Aflatoxins | III. Cephalosporium |
| D. Ochratoxins | IV. Aspergillus flavus |
Choose the correct answer from the options given below
1. A-(I), B-(II), C-(III), D-(IV)
2. A-(II), B-(III), C-(IV), D-(I)
3. A-(III), B-(IV), C-(II), D-(I)
4. A-(IV), B-(I), C-(II), D-(III)
Subtopic: Â Kingdom Fungi: Introduction |
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Hints
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 |
 89%
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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%
From NCERT
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Trypanosoma causes the disease "sleeping sickness" and belongs the following group of protozoans
1. Ciliated
2. Flagellated
3. Sporozoans
4. Amoeboid
1. Ciliated
2. Flagellated
3. Sporozoans
4. Amoeboid
Subtopic: Â Protozoa |
 75%
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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 |
 78%
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Subtopic: Â Virus, Viroids & Prions |
 91%
From NCERT
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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 |
 83%
From NCERT
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Subtopic: Â Kingdom Protista: Dinoflagellates |
 96%
From NCERT
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