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) |
 78%
Level 2: 60%+
Hints
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%+
Hints
Which one of the following plants does not show plasticity
| 1. | Maize | 2. | Cotton |
| 3. | Coriander | 4. | Buttercup |
Subtopic: Â Development |
 81%
Level 1: 80%+
Hints
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%+
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%+
Hints
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 |
 87%
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 |
 79%
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
 71%
Level 2: 60%+
Hints
Which one of the following statement is not true regarding gel electrophoresis technique ?
| 1. | Bright orange coloured bands of DNA can be observed in the gel when exposed to UV light. |
| 2. | The process of extraction of separated DNA strands from gel is called elution. |
| 3. | The separated DNA fragments are stained by using ethidium bromide. |
| 4. | The presence of chromogenic substrate gives blue coloured DNA bands on the gel. |
 84%
Level 1: 80%+
Hints
Which of the following is incorrectly matched?
| 1. | Volvox - Starch | 2. | Ectocarpus - Fucoxanthin |
| 3. | Ulothrix - Mannitol | 4. | Porphyra - Floridian starch |
 72%
Level 2: 60%+
Hints
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