In genetic engineering, the antibiotic-resistance gene is used:
1. To select healthy vectors
2. As sequences from where replication starts
3. To keep the cultures free of infection
4. As selectable markers
1. To select healthy vectors
2. As sequences from where replication starts
3. To keep the cultures free of infection
4. As selectable markers
The secretory phase in the human menstrual cycle is also called:
| 1. | Follicular phase lasting for about 6 days |
| 2. | Luteal phase and lasts for about 13 days |
| 3. | Follicular phase and lasts for about 13 days |
| 4. | Luteal phase and lasts for about 6 days |
Through their effect on plant growth regulators, what do the temperature and light control in the plants?
1. Flowering
2. Closure of stomata
3. Fruit elongation
4. Apical dominance
Which one of the following human organs is often called the "graveyard" of RBCs?
1. Kidney
2. Spleen
3. Liver
4. Gall bladder
Which one of the following pairs of animals is similar to each other pertaining to the feature stated against them?
| 1. | Garden lizard and Crocodile - Three-chambered heart |
| 2. | Ascaris and Ancylostoma - Metameric segmentation |
| 3. | Sea horse and Flying fish - Cold-blooded (poikilothermal) |
| 4. | Pteropus and Ornithorhyncus - Viviparity |
The idea of mutations was brought forth by:
| 1. | Gregor Mendel, who worked on Pisum sativum |
| 2. | Hardy Weinberg, who worked on allele frequencies in a population |
| 3. | Charles Darwin, who observed a wide variety of organisms during sea voyages |
| 4. | Hugo do Vries, who worked on evening primrose |
Select the correct statement about biodiversity:
| 1. | Large-scale planting of Bt cotton has no adverse effect on biodiversity |
| 2. | Western Ghats have a very high degree of species richness and endemism |
| 3. | Conservation of biodiversity is just a fad pursued by developed countries |
| 4. | The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals |
Plants with ovaries having only one or a few ovules are generally pollinated by:
1. Butterflies
2. Birds
3. Wind
4. Bees
Consider the following four statements (I-IV) and select the option which includes all the correct ones only:
| I. | Single-cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins, etc. |
| II. | Body weight-wise, the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than that produced by a cow per day through its milk. |
| III. | Common button mushrooms are a very rich source of vitamin C. |
| IV. | A rice variety has been developed which is very rich in calcium. |
1. Statements (I), (III), and (IV)
2. Statements (II), (III), and (IV)
3. Statements (I), (II)
4. Statements (III), (IV)
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