When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :
1. Sub-metacentric
2. Acrocentric
3. Metacentric
4. Telocentric
In the equation GPP – R = NPP, R represents:
1. Environment factor
2. Respiration losses
3. Radiant energy
4. Retardation factor
Which of the following stages of meiosis involves division of centromere?
| 1. | Anaphase II |
| 2. | Telophase II |
| 3. | Metaphase I |
| 4. | Metaphase II |
Match List-I with List-II
| List-I | List - II | ||
| a. | Cristae | i. | Primary constriction in chromosome |
| b. | Thylakoids | ii. | Disc-shaped sacs in Golgi apparatus |
| c. | Centromere | iii. | Infoldings in mitochondria |
| d. | Cisternae | iv. | Flattened membranous sacs in stroma of plastids |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (i) | (iv) | (iii) | (ii) |
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, brings genetically different types of pollen grains to stigma, is:
| 1. | Chasmogamy | 2. | Cleistogamy |
| 3. | Xenogamy | 4. | Geitonogamy |
Which of the following algae contains mannitol as reserve food material?
| 1. | Volvox | 2. | Ulothrix |
| 3. | Ectocarpus | 4. | Gracilaria |
DNA strands on a gel, stained with ethidium bromide, when viewed under UV radiation, appear as:
| 1. | Dark red bands | 2. | Bright blue bands |
| 3. | Yellow bands | 4. | Bright orange bands |
Which of the following are not secondary metabolites in plants?
| 1. | Vinblastin, curcumin | 2. | Rubber, gums |
| 3. | Morphine, codeine | 4. | Amino acids, glucose |
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