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Q. No.In Amoeba, contractile vacuoles:
1.
contains water, sap, excretory product and other materials not useful for the cell.
2.
store enzymes capable of digesting carbohydrates, proteins, lipids and nucleic acids.
3.
are formed by engulfing the food particles.
4.
are important for osmoregulation and excretion.
Subtopic: Vacuole |
72%
Level 2: 60%+
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What would be true regarding the names of chromosomes described in the given table?
1. A and B only
2. A and C only
3. C and D only
4. B and D only
| I: | Centromere placement very close to the top, p arms not visible |
| II: | q arms are much longer than the p arms. |
| III: | p and q arms are very close in length but not equal. |
| IV: | p and q arms are equal in length. |
| A: | I is Acrocentric and II is Telocentric |
| B: | III is Metacentric and IV is Sub-metacentric |
| C: | I is Telocentroic and II is Acrocentric |
| D: | III is sub-metacentric and IV is Metacentric |
1. A and B only
2. A and C only
3. C and D only
4. B and D only
Subtopic: Nucleus: Chromosomes |
89%
Level 1: 80%+
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
| Statement I: | Mature sieve tube elements of vascular plants and mature human erythrocytes are not considered as ‘living’ cells. |
| Statement II: | Mature sieve tube elements of vascular plants and mature human erythrocytes lack a nucleus. |
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
Subtopic: Nucleus |
69%
Level 2: 60%+
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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
1. Chloroplast
2. Mitochondria
3. Nucleus
4. Endoplasmic reticulum
Subtopic: Mitochondria |
82%
Level 1: 80%+
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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%
Level 1: 80%+
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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%
Level 1: 80%+
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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%
Level 1: 80%+
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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 |
84%
Level 1: 80%+
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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 |
62%
Level 2: 60%+
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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%
Level 2: 60%+
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