- 1(current)
Q. No.The plasmid DNA in certain bacteria:
1. Only I is incorrect
2. Only II is incorrect
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is a small circular DNA and an integral part of the genomic DNA. |
| II: | confers certain unique phenotypic characters to such bacteria and one such character is resistance to antibiotics. |
2. Only II is incorrect
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
From NCERT
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Regarding the genetic material in prokaryotes:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The main chromosomal DNA is linear |
| II: | Plasmid DNA is circular |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Details of Prokaryotic Cell Structure |
56%
From NCERT
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Identify the correct statement regarding the cell envelope of a prokaryotic cell:
| I: | The outermost layer of the cell envelope is called as the glycocalyx which may be present as a loose sheath called the slime layer or a thick and tough capsule. |
| II: | The cell wall determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing. |
| III: | Plasma membrane is selectively permeable in nature and interacts with the outside world. |
| IV: | Bacterial cells can be classified as Gram positive and Gram negative based on the staining properties of their plasma membrane. |
| 1. | All except IV | 2. | Only I and II |
| 3. | I, II, III and IV | 4. | Only II, III and IV |
Subtopic: Details of Prokaryotic Cell Structure |
From NCERT
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The terms ‘slime layer’ and ‘capsule’ can be used for which layer of the complex cell envelope of a typical bacterial cell?
1. Glycocalyx
2. Gram positive cell wall
3. Gram negative cell wall
4. Cell membrane
1. Glycocalyx
2. Gram positive cell wall
3. Gram negative cell wall
4. Cell membrane
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
96%
From NCERT
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Which component of the cell envelope of a bacterial cell provides structural support to prevent the bacterium from bursting or collapsing?
1. Slime layer of glycocalyx
2. Capsule of glycocalyx
3. Cell wall
4. Cell membrane
1. Slime layer of glycocalyx
2. Capsule of glycocalyx
3. Cell wall
4. Cell membrane
Subtopic: Details of Prokaryotic Cell Structure |
73%
From NCERT
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Mesosomes in a bacterial cell:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | are formed by the extensions of plasma membrane into the cell. |
| II: | help in cell wall formation, DNA replication and distribution to daughter cells. |
| III: | contain pigments in cyanobacteria. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Prokaryotic Cell Organisation | Details of Prokaryotic Cell Structure |
60%
From NCERT
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In some prokaryotes like cyanobacteria, there are membranous extensions into the cytoplasm which contain pigments and are called:
1. Mesosomes
2. Gas vacuoles
3. Inclusion bodies
4. Chromatophores
1. Mesosomes
2. Gas vacuoles
3. Inclusion bodies
4. Chromatophores
Subtopic: Details of Prokaryotic Cell Structure | Cell Wall |
84%
From NCERT
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- 1(current)
Q. No.
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