The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:
| 1. | Terminalization | 2. | Synaptonemal complex |
| 3. | Bivalent | 4. | Sites at which crossing over occurs |
Subtopic: Â Cell Cycle: Meiosis I |
 74%
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
The gaseous plant growth regulator is used in plants to:
| 1. | kill dicotyledonous weeds in the fields |
| 2. | speed up the malting process |
| 3. | promote root growth and root hair formation to increase the absorption surface |
| 4. | help overcome apical dominance |
Subtopic: Â Ethylene |
 74%
Level 2: 60%+
Hints
Read the following statements about the vascular bundles:
Choose the correct answer from the options given below:
| (a) | In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii |
| (b) | Conjoint closed vascular bundles do not possess cambium |
| (c) | In open vascular bundles, cambium is present in between xylem and phloem |
| (d) | The vascular bundles of dicotyledonous stem possess endarch protoxylem |
| (e) | In monocotyledonous root, usually there are more than six xylem bundles present |
Choose the correct answer from the options given below:
| 1. | (a), (c), (d) and (e) only | 2. | (a), (b) and (d) only |
| 3. | (b), (c), (d) and (e) only | 4. | (a), (b), (c) and (d) only |
Subtopic: Â Vascular Tissue System |
Level 3: 35%-60%
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
What amount of energy is released from glucose during lactic acid fermentation?
| 1. | Less than 7% | 2. | Approximately 15% |
| 3. | More than 18% | 4. | About 10% |
Subtopic: Â Fermentation |
 80%
Level 1: 80%+
Hints
Subtopic: Â Sex Determination |
 79%
Level 2: 60%+
Hints
What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?
| 1. | Eight | 2. | Four |
| 3. | Six | 4. | Two |
Subtopic: Â Glycolysis |
 64%
Level 2: 60%+
Hints
Match List - I with List - II
Choose the correct answer from the options given below:
| List I | List II | ||
| (a) | Manganese | (i) | Activates the enzyme catalase |
| (b) | Magnesium | (ii) | Required for pollen germination |
| (c) | Boron | (iii) | Activates enzymes of respiration |
| (d) | Iron | (iv) | Functions in splitting of water during photosynthesis |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (i) | (ii) | (iii) |
 68%
Level 2: 60%+
Hints
"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:
| 1. | osmosis is observed |
| 2. | water is transported |
| 3. | food is transported |
| 4. | for both water and food transportation |
Subtopic: Â Phloem Translocation: Short Distance Transport |Â Phloem Translocation |
 75%
Level 2: 60%+
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