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Q. No.The plasmid DNA in certain bacteria:
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.
1. Only I is incorrect
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 |
50%
From NCERT
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Identify the correctly matched pairs:
| I: | Anton Von Leeuwenhoek | first saw and described a live cell |
| II: | Robert Brown | discovered the nucleus |
| III: | Matthias Schleiden | was a German zoologist |
| IV: | Theodor Schwann | was a British botanist |
1. Only I and II
2. Only I and III
3. I, II, III and IV
4. Only III and IV
Subtopic: Introduction to Cell | Cell Theory |
83%
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 |
83%
From NCERT
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| Assertion (A): | In eukaryotic cells, there is an extensive compartmentalisation of cytoplasm. |
| Reason (R): | Eukaryotic cells are characterised by the presence of membrane bound organelles. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Eukaryotic Cell Architecture: Types |
75%
From NCERT
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Consider the given two statements:
| Assertion (A): | The Golgi apparatus remains in close association with the endoplasmic reticulum. |
| Reason (R): | The cis and the trans faces of the organelle are entirely different, but interconnected. |
| 1. | Both (A) and (R) are True but the (R) does not explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and (R) correctly explains (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Golgi Apparatus |
86%
From NCERT
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Ribosomes:
1. are 70 S in prokaryotes having two subunits 30 S and 40 S.
2. are bound by a single membrane only in eukaryotes.
3. are composed of RNA and proteins.
4. are sites of protein synthesis in eukaryotes but not in prokaryotes.
1. are 70 S in prokaryotes having two subunits 30 S and 40 S.
2. are bound by a single membrane only in eukaryotes.
3. are composed of RNA and proteins.
4. are sites of protein synthesis in eukaryotes but not in prokaryotes.
Subtopic: Ribosome and Inclusion Bodies |
87%
From NCERT
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The arrangement of axonemal microtubules in cilia and flagellum is referred to as 9 + 2 array which essentially means that the axoneme has:
| 1. | nine doublets of radially arranged peripheral microtubules and two doublets of centrally located microtubules enclosed by a central sheath. |
| 2. | nine triplets of radially arranged peripheral microtubules and a pair of centrally located microtubules enclosed by a central sheath. |
| 3. | nine triplets of radially arranged peripheral microtubules and a centrally located protein hub not enclosed by a central sheath. |
| 4. | nine doublets of radially arranged peripheral microtubules and a pair of centrally located microtubules enclosed by a central sheath. |
Subtopic: Cilia & Flagella |
68%
From NCERT
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Identify the incorrectly matched pair:
| Structure | Size range | |
| 1. | Perinuclear space | 10 – 50 nm |
| 2. | Length of chloroplasts | 2 – 5 µm |
| 3. | Typical eukaryotic cell | 10 – 20 µm |
| 4. | Typical bacterium | 1 – 2 µm |
Subtopic: Plastids |
61%
From NCERT
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Identify the statement that correctly describes the amount of DNA in a typical somatic cell of human body?
| 1. | A single human cell has approximately one metre long thread of DNA distributed among its twenty three (one set) chromosomes. |
| 2. | A single human cell has approximately two metre long thread of DNA distributed among its twenty three (one set) chromosomes. |
| 3. | A single human cell has approximately two metre long thread of DNA distributed among its forty six (twenty three pairs) chromosomes. |
| 4. | A single human cell has approximately one metre long thread of DNA distributed among its forty six (twenty three pairs) chromosomes. |
Subtopic: Nucleus: Chromosomes |
83%
From NCERT
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Plant and animal cells are different as:
I: Plant cells possess cell walls which is absent from animal cells.
II: Plant cells possess plastids and a large central vacuole which are absent in animal cells.
III: Plant cells have centrioles which are absent in almost all animal cells
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
Subtopic: Eukaryotic Cell Architecture: Types |
92%
From NCERT
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