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UPSC Civil services Entrance exams General Studies test # General Science Cell Cycle and Cell Division Prepare / Learn

Q1. Which one is not a significance of meiotic cell division?

A. New recombination of genes

B. Number of chromosomes remain same

C. Number of chromosome reduced to half

D. Formation of spores and gametes

Answer : Option B
Explaination / Solution:

Meiosis cell division results in halving of chromosome number in daughter cells, recombination of genes and formation of spores and gametes.

UPSC Civil services Entrance exams General Studies test # General Science Surface Chemistry Prepare / Learn

Q2. Which type of a property is the Brownian movement of colloidal solution?

A. Electrical

B. Electrochemical

C. Mechanical

D. Optical

Answer : Option C
Explaination / Solution:

Movement is always a mechanical property.

UPSC Civil services Entrance exams General Studies test # General Science Electric Charges and Fields Prepare / Learn

Q3. Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm and have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B?

A. 6.7×10−3/N6.7×10−3/N

B. 3.7×10−3/N3.7×10−3/N

C. 5.7×10−3/N

D. 4.7×10−3/N

Answer : Option C
Explaination / Solution:

If A and B having charge

6.5 \times 10^{- 7} C

each and a third sphere C having charge=0 If C is in contact with A than new charge on A and C

q_{A} = q_{C} = \frac{6.5 \times 10^{- 7} + 0}{2} = 3.25 \times 10^{- 7} C

Now C is put in contact with B so new charge on C and B

Now new charge on A is

q_{A} = 3.25 \times 10^{- 7} C

and on B is

q_{B} = 4.875 \times 10^{- 7} C

and distance =50 cm So

UPSC Civil services Entrance exams General Studies test # General Science Mechanical Properties of Solids Prepare / Learn

Q4.

In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0 kg from a vertical steel wire 0.50 m long and 2.5

\times

1 0^{- 3}

c m^{2}

in cross-sectional area. On the bottom of the sphere he attaches a similar steel wire, from which he hangs a brass cube of mass 10.0 kg. Compute the elongation.

A. 1.4 mm upper, 1.0 mm lower

B. 1.5 mm upper, 1.1 mm lower

C. 1.7 mm upper, 1.0 mm lower

D. 1.6 mm upper, 1.0 mm lower

Answer : Option D
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Biotechnology Principles and Processes Prepare / Learn

Q5. Elution can be done by using the enzyme

A. Agarase

B. Pectinase

C. Cellulase

D. Chitinase

Answer : Option A
Explaination / Solution:

Elution is the process of extracting one material from another by washing with a solvent. Elution can be done by using enzyme agarase that can catalyze the hydrolysis of agar.

UPSC Civil services Entrance exams General Studies test # General Science Excretory Products and their Elimination Prepare / Learn

Q6. Rahul is anaemic and few days ago suffered from massive haemorrhage. Now what problems he may face :

A. accumulation of waste products in body

B. very low blood pressure

C. no glomerular filteration

D. all of these

Answer : Option D
Explaination / Solution:

If anemic person suffered from massive haemorrhage, the problem he may face includes, very low blood pressure, accumulation of wastes products in body and no glomerular filtration in kidney.

UPSC Civil services Entrance exams General Studies test # General Science Thermodynamics Prepare / Learn

Q7. A refrigerator is to maintain eatables kept inside at 9

^{\circ}

C. If room temperature is 36

^{\circ}

C, calculate the coefficient of performance.

A. 11.8

B. 11.4

C. 12.4

D. 10.4

Answer : Option D
Explaination / Solution:

K=TLTH−TL=282309−282=10.4

UPSC Civil services Entrance exams General Studies test # General Science Evolution Prepare / Learn

Q8. Some ancient organism still survive on earth but most of them have become extinct this is because of

A. All of these

B. Presence of special genes

C. Presence of characteristics which enable them to survive

D. Absence of senescence gene

Answer : Option C
Explaination / Solution:

Some ancient organism still survive on earth but most of them have become extinct this is because of presence of characteristic which enable them to survive better in natural conditions.

UPSC Civil services Entrance exams General Studies test # General Science States of Matter Prepare / Learn

Q9. The van der Waals Equation adjusts the measured volume

A. down by subtracting a factor from the entire container volume that accounts for the molecular volume

B. up by subtracting a factor from the entire container volume that accounts for the molecular volume

C. up by subtracting a factor from the entire container volume that accounts for the container volume

D. down by adding a factor from the entire container volume that accounts for the molecular volume