CSIR Lifesciences June 2011 part A solved

1.       The 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

1. 9.9 crores

2. 91 crores

3. 90 crores

4. 9.0 crores

2. Popular use of which of the following fertilizers increases the acidity of soil?

1. Potassium Nitrate

2. Ammonium sulphate

3. Urea

4. Superphosphate of lime

3. 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?

1. Mutation broke the protein

2. The organism could not make amino acids

3. Mutation created a terminator codon

4. The gene was not transcribed

4. A reference material is required to be prepared with 4 ppm calcium. The amount of CaCO3 (molecular weight = 100) required to prepare 1000 g of such a reference material is

1. 10 μg

2. 4 μg

3. 4 mg

4. 10 mg

5. Identify the figure which depicts a first order reaction

6. The speed of a car increases every minute as shown in the following Table. The speed at the end of the 19th minute would be

1. 26.5

2. 28.0

3. 27.0

4. 28.5

7. If the atmospheric concentration of carbon dioxide is doubled and there are favorable conditions of water, nutrients. light and temperature. What would happen to water requirement of plants?

1. It decreases initially for a short time and then returns to the original value

2. It increases

3. It decreases

4. It increases initially for a short time and then returns to the original value

8. If Vinput is applied to the circuit shown, the output would be

9. A physiological disorder X always leads to the disorder Y. However, disorder Y may occur by itself. A population shows 4% incidence of disorder Y. Which of the following inferences is valid

1. 4% of the population suffers from both X&Y

2. less than 4% of the population suffers from X

3. At least 4% of the population suffers from X

4. There is no incidence of X in the given population

10. Water is dropping out of a tiny hole at the bottom of three flasks whose base diameter ' is the same, and are initially filled to the same height,as shown

Which is the correct comparison of the rate of fall of the volume of water in the three flasks?

1. A fastest, B slowest

2. B fastest, A slowest

3. B fastest, C slowest

4. C fastest, B slowest

11. How many σ bonds are present in the following molecule?

HC≡CCH=CHCH3

1. 4

2. 10

3. 6

4. 13

12. The graph represents the depth profile 0f temperature in the open ocean; in which region this is likely to be prevalent

1. Tropical region

2. Equatorial region

3. Polar region

4. Sub-tropical region

13. The normal boiling point of a solvent (whose vapour pressure curve is shown in the figure) on a planet whose normal atmosphere pressure is 3 bar, is about

1. 400K

2. 273K

3. 100K

4. 500K

14. Diabetic patients are advised a low glycaemic index diet. The reason for this is

1. They require less carbohydrate than healthy individuals

2. They cannot assimilate ordinary carbohydrates

3. They need to have slow, but sustained release of glucose in their blood stream

4. They can tolerate lower, but not higher than normal blood sugar levels

15. Glucose molecules diffuse across a cell of diameter d in time τ. If the cell diameter is tripled, the diffusion time would

1. increase to 9τ

2. decrease to τ/3

3. increase to 3τ

4. decrease to τ/9

16. The reason for the hardness of diamond is

1. extended covalent bonding

2. layered structure

3. formation of cage structures

4. formation of tubular structures

17. Which of the following particles has the largest range in a given medium if their initial energies arc the same?

1. alpha

2. gamma

3. positron

4. electron

18. A ball is dropped from a height h above the surface of the earth. Ignoring air drag, the curve that best represents its variation of acceleration is

19. Among on a polished stone floor one feels colder than on a rough floor of the same stone. This is because

1. Thermal conductivity of the stone depends on the surface smoothness

2. Specific heat of the stone changes by polishing it

3. The temperature of the polished floor is lower than that of the rough floor

4. There is greater heat loss from the holes of the feet when in contact with the polished floor than with the rough floor

20. The acidity of normal rain water is due to

1. SO2

2. CO2

3. NO2

4. NO