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Q. No.Unless specifically stained, which of the following is not easily visible under the light microscope in a typical eukaryotic cell?
1. Chloroplast
2. Mitochondria
3. Nucleus
4. Endoplasmic reticulum
Subtopic: Mitochondria |
82%
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Identify the incorrectly matched pair:
1. Only I
2. Only II, III and IV
3. None, all are correctly matched
4. Only III and IV
| I | Chloroplasts | contain chlorophyll and carotenoid pigments |
| II | Amyloplasts | store carbohydrates |
| III | Elaioplasts | store oils and fats |
| IV | Aleuroplasts | store proteins |
2. Only II, III and IV
3. None, all are correctly matched
4. Only III and IV
Subtopic: Plastids |
87%
From NCERT
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The isolated lysosomal vesicles have been found to be very rich in:
| 1. | phosphate and chloride ions |
| 2. | cytoprotective pigment molecules |
| 3. | lymphokines like interleukins and interferons |
| 4. | acid hydrolases |
Subtopic: Lysosomes |
93%
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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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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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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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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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. |
Subtopic: Ribosome and Inclusion Bodies |
87%
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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%
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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. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
Subtopic: Eukaryotic Cell Architecture: Types |
75%
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