Multiple Choice QuestionsThe cumulative profits of a company since its inception are shown in the diagram. If the net worth of the company at the end of 4th year is 99 Crores, the principal it had started with was:
9.0crores
99 crores
90 crores
9.9 crores
Popular use of which of the following fertilizers increase the acidity of soil?
Potassium nitrate
Ammonium sulphate
Urea
Superphoshate of lime
Exposing an organism to a certain chemical can change nucleotide bases in a gene, causing mutation. In one such mutated organism if a protein had only 70% of the primary amino acid sequence, which of the following is likely?
Mutation broke the protein
The organism could not make amino acid
Mutation created a terminator codon
The gene was not transcribed
The speed of a car increases very minute as shown in the following table. The speed at the end of the 19th minute would be
| Times (minutes) | Speed(m/sec) |
| 1 | 1.5 |
| 2 | 3.0 |
| 3 | 4.5 |
| - | - |
| - | - |
| 24 | 36.0 |
| 25 | 37.5 |
26.5
28.0
27.0
28.5
If the atmospheric concentration of carbon dioxide is doubled and there are favourable conditions of water, nutrients, light and temperature, what would happen to water requirement of plants?
It decrease initially for short time and then return to original value
It increases
It decreases
It increases initally for short time and then return to orginal value.
C.
It decreases
The increased atmospheric CO2 concentration can have a direct effect on the growth. This effect that increases CO2 has on the closure of stomata small openings in leaf surface through which CO2 is absorbed and through which water vapour is released by transpiration. This tends to reduce the water requirements of plant by reducing the transpiration.
Diabetic patients are advised a low glycaemic index diet. The reason for this is:
They requires less carbohydrate than healthy individuals
They cannot assimilate ordinary carbohydrates
They need to have slow, but sustained release of glucose in their blood stream.
They can tolerate lower, but not higher than normal blood sugar level.
Glucose molecules diffuse across a cell of diameter d in time τ. If the cell diameter I tripled, the diffusion time would
Increase to 9 τ
Decrease to τ/3
Increase to 3 τ
Decrease to τ/9
The reason for the hardness of diamond is
Extended covalent bonding
Layered structure
Formation of cage structure
Formation of tubular structure
Which of the following particles has the largest range in a given medium if their initial energies are the same?
Alpha
Gamma
Positron
Electron
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