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)
Which one of the following biomolecules is correctly characterised?
1. | Palmitic acid - an unsaturated fatty acid with 18 carbon atoms |
2. | Adenylic acid - adenosine with a glucose phosphate molecule |
3. | Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule |
4. | Lecithin - a phosphorylated glyceride found in the cell membrane |
For its action, nitrogenase requires:
1. Light
2. Mn2+
3. Super oxygen radicals
4. High input of energy
Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells):
1. A particular hormone
2. An antifeedant
3. A toxic protein
4. Both sense and anti-sense RNA
Where do certain symbiotic microorganisms typically occur in the human body?
1. Oral lining and tongue surface
2. Vermiform appendix and rectum
3. Duodenum
4. Caecum