Measuring Biochemical Oxygen Demand (BOD) is a method used for:
| 1. | Estimating the amount of organic matter in sewage water |
| 2. | Working out the efficiency of oil-driven automobile engines |
| 3. | Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale |
| 4. | Working out the efficiency of RBCs about their capacity to carry oxygen |
Which one of the following is not part of a transcription unit in DNA?
1. The inducer
2. A Terminator
3. A promoter
4. The structural gene
A certain road accident patient with an unknown blood group needs an immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
| 1. | Blood group B | 2. | Blood group AB |
| 3. | Blood group O | 4. | Blood group A |
Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin-A deficiency?
| 1. | Flaver savr tomato | 2. | Canolla |
| 3. | Golden rice | 4. | Bt-brinjal |
The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in which part of the nephron?
1. Ascending limb of the loop of Henle
2. Distal convoluted tubule
3. Proximal convoluted tubule
4. Descending limb of the loop of Henle
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
| 1. | Sympathetic nervous system activated releasing epinephrine and norepinephrine from adrenal medulla |
| 2. | Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse |
| 3. | Hypothalamus activates the parasympathetic division of the brain |
| 4. | Sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal cortex |
Which one of the following is not a gaseous biogeochemical cycle in the ecosystem?
1. Sulphur cycle
2. Phosphorus cycle
3. Nitrogen cycle
4. Carbon cycle
1. Vector
2. Selectable marker
3. Plasmid
4. Probe
© 2026 GoodEd Technologies Pvt. Ltd.