The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included:
Choose the correct answer from the options given below:
| A. | Cell structure |
| B. | Body organization |
| C. | Presence of flagellum |
| D. | Reproduction |
| E. | Phylogenetic relationships |
| 1. | A, B, D and E only | 2. | A, B, C, D and E |
| 3. | A, B and E only | 4. | B, C and D only |
Subtopic: Different Classification Systems |
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Which one of the following is a triploid cell ?
| 1. | Central cell | 2. | Primary endosperm cell |
| 3. | Zygote | 4. | Synergid |
Subtopic: Double Fertilization |
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Which of the following statements are correct with reference to packaging of DNA helix?
Choose the correct answer from the options given below:
| A. | Histones are organized to form a unit of eight molecules called histone octamer. |
| B. | Histones are negatively charged basic proteins. |
| C. | Histones are rich in the basic amino acid residues - lysine and arginine. |
| D. | The positively charged DNA is wrapped around the histone octamer to form nucleosome. |
| E. | The packaging of chromatin at higher levels requires an additional set of proteins called non-histone chromosomal proteins. |
| 1. | A, B and D only | 2. | A, C and E only |
| 3. | C, D and E only | 4. | B, D and E only |
Subtopic: DNA Packaging |
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Which of the following is an in situ conservation method?
| 1. | Sacred Groves | 2. | Wildlife Safari Parks |
| 3. | Botanical Gardens | 4. | Seed Banks |
Subtopic: In Situ Conservation of Biodiversity |
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In the lac operon, the z gene codes for:
| 1. | transacetylase | 2. | the repressor of lac operon |
| 3. | permease | 4. | beta-galactosidase |
Subtopic: Gene Regulation: Lac Operon |
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Match List-I with List-II:
Choose the correct answer from the options given below :
| List-I (Growth Regulator) |
List-II (Function/Effect) |
||
| A. | 2,4-D | I. | Brewing industry |
| B. | \(GA_3\) | II. | Stimulation of stomatal closure |
| C. | Kinetin | III. | Herbicide |
| D. | ABA | IV. | Nutrient mobilisation |
| 1. | A-IV, B-III, C-II, D-I |
| 2. | A-I, B-II, C-IV, D-III |
| 3. | A-III, B-I, C-IV, D-II |
| 4. | A-I, B-IV, C-III, D-II |
Subtopic: Miscellaneous |
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Arrange the following steps of somatic hybridisation in a correct sequence.
Choose the correct answer from the options given below :
| A. | Digestion of cell walls. |
| B. | Isolation of naked protoplasts. |
| C. | Fusion of protoplasts to get hybrid protoplast. |
| D. | Isolation of single cells from two different varieties of plants. |
| E. | Growing of hybrid protoplast to form a new plant. |
| 1. | E, A, B, C, D | 2. | D, A, B, C, E |
| 3. | E, B, A, D, C | 4. | D, B, A, E, C |
Subtopic: Plant Tissue Culture |
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\(\begin{aligned} & 2\left(\mathrm{C}_{51}^{} \mathrm{H}_{98} \mathrm{O}_6\right)+145 \mathrm{O}_2 \longrightarrow102 \mathrm{CO}_2+98 \mathrm{H}_2 \mathrm{O}+\text { energy } \end{aligned}\)
The Respiratory Quotient (RQ) of a biomolecule used for respiration, as per the above equation, would be :
1. Less than 0.5
2. Between 0.5 and 0.95
3. Between 1.25 and 2
4. 1.0
The Respiratory Quotient (RQ) of a biomolecule used for respiration, as per the above equation, would be :
1. Less than 0.5
2. Between 0.5 and 0.95
3. Between 1.25 and 2
4. 1.0
Subtopic: Respiratory Quotient |
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Since the origin and diversification of life on Earth, there have been five episodes of extinction of species. How is the sixth extinction which is in progress different from the previous episodes?
| 1. | The current species extinction rates are lower than those in previous episodes. |
| 2. | The present species extinction rates are 100 to 1000 times faster than in the pre-human times. |
| 3. | The present net species extinction rate is zero. |
| 4. | The current species extinction rate is nearly 10 times faster than that in previous episodes. |
Subtopic: Loss of Biodiversity |
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Match List-I with List-II:
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-IV, D-I
4. A-IV, B-III, C-II, D-I
| List-I | List-II | ||
| A. | Trypsin | I. | Intercellular ground substance |
| B | Morphine | II. | Lectin |
| C | Concanavalin | III. | Enzyme |
| D | Collagen | IV. | Alkaloid |
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-IV, D-I
4. A-IV, B-III, C-II, D-I
Subtopic: Proteins |
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