Q. No.Which one of the following never occurs during mitotic cell division?
| 1. | Coiling and condensation chromatids |
| 2. | Spindle fibres attach to Kinetochores of chromosomes |
| 3. | Movement of centrioles towards opposite poles |
| 4. | Pairing of homologous chromosomes |
Subtopic: Â Cell Division: Mitosis (Karyokinesis) |Â Cell Division: Mitosis (Cytokinesis) |
 76%
Level 2: 60%+
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Which one of the following statements cannot be connected to predation?
| 1. | It is necessitated by nature to maintain the ecological balance |
| 2. | It helps in maintaining species diversity in a community |
| 3. | It might lead to the extinction of a species |
| 4. | Both the interacting species are negatively impacted |
Subtopic: Â Population Interactions: Predation |
 74%
Level 2: 60%+
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Which one of the following plants does not show plasticity
| 1. | Maize | 2. | Cotton |
| 3. | Coriander | 4. | Buttercup |
Subtopic: Â Development |
 72%
Level 2: 60%+
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The flowers are Zygomorphic in:
Choose the correct answer from the options given below:
| a. Mustard | b. Gulmohar | c. Cassia |
| d. Datura | e. Chilly |
| 1. | c, d, e only | 2. | a, b, c only |
| 3. | b, c only | 4. | d, e only |
Subtopic: Â Flower & Parts of Flower |
 75%
Level 2: 60%+
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Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves :
It involves :
| 1. | Reduction of NADP to NADPH2 on the stroma side of the membrane |
| 2. | Breakdown of proton gradient |
| 3. | Breakdown of electron gradient |
| 4. | Movement of protons across the membrane to the stroma |
 65%
Level 2: 60%+
Hints
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Polymerase chain reaction is used in DNA amplification. |
| Reason (R): | The ampicillin resistant gene is used as a selectable marker to check transformation. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Â Polymerase Chain Reaction: PCR |
 78%
Level 2: 60%+
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Habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for :
| 1. | Natality | 2. | Population explosion |
| 3. | Competition | 4. | Biodiversity loss |
Subtopic: Â Loss of Biodiversity |
 85%
Level 1: 80%+
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below :
| Statement I : | The primary \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells |
| Statement II : | Mesophyll cells in \(C_4\) plants lack RuBisCo enzyme. |
In the light of the above statements, choose the correct answer from the options given below :
| 1. | Statement I is incorrect but Statement II is correct |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is correct but Statement II is incorrect |
 80%
Level 1: 80%+
Hints
Identify the incorrect statement related to Pollination:
| 1. | Moths and butterflies are the most dominant pollinating agents among insects |
| 2. | Pollination by water is quite rare in flowering plants |
| 3. | Pollination by wind is more common amongst abiotic pollination |
| 4. | Flowers produce foul odours to attract flies and beetles to get pollinated |
Subtopic: Â Pollination & Outbreeding Devices |
 69%
Level 2: 60%+
Hints
Hydrocolloid carrageen is obtained from:
1. Phaeophyceae only
2. Chlorophyceae and Phaeophyceae
3. Phaeophyceae and Rhodophyceae
4. Rhodophyceae only
1. Phaeophyceae only
2. Chlorophyceae and Phaeophyceae
3. Phaeophyceae and Rhodophyceae
4. Rhodophyceae only
 72%
Level 2: 60%+
Hints
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