Previous year MCQs

General science UPPSC 2020 GS-I
Question

Change in the base sequence within a gene is called:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Mutation

Detailed Solution:

The correct answer is “Mutation”.
A mutation refers to a change in the base sequence within a gene. This alteration can lead to variations in the gene's function or expression.

Similar Questions:

Which one of the following is not infotech terminology?
  1. A) cyberspace
  2. B) upload
  3. C) optical storage
  4. D) modem
Who of the following was sent as representative of labourers by Indian Government in the Washington Summit of I.L.O. in the year 1919?
  1. A) VP Wadia
  2. B) NM Joshi
  3. C) CF Andrews
  4. D) Joseph Baptista
Which among the following hosted "Global Vaccine Summit" on 4th June, 2020 ?
  1. A) United Kingdom
  2. B) United States of America
  3. C) India
  4. D) China
Assertion (A): Lighting a candle in space does not produce a flame.
Reason (R): A flame exists due to the pull of gravity.

In the context of the above, which one of the following is correct?
  1. A) Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. B) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  3. C) A) is true, but (R) is false.
  4. D) (A) is false, but (R) is true.
Which one of the following is used as the coolant in the "Fast Breeder Test Reactor" at Kalpakkam?
  1. A) Carbon dioxide
  2. B) Heavy water
  3. C) Sea water
  4. D) Molten sodium
Which among the following became the first Arab Nation to launch the Mars Mission in July, 2020 ?
  1. A) Saudi Arabia
  2. B) Kuwait
  3. C) United Arab Emirates
  4. D) Qatar
Given:

1. Blood cells
2. Bone cells
3. Hair strands
4. Saliva

Samples taken for DNA testing in criminal investigation can be
  1. A) 1, 2 and 3 only
  2. B) 1 and 4 only
  3. C) 2 and 3 only
  4. D) 1, 2, 3 and 4
Match List I with List II and select the correct answer from the code given below:
List-I - List-II

A. Dry Ice - 1. Treatment of Cancer
B. Gene therapy - 2. Freezing living bodies to be revived later
C. Cryonics - 3. Solid carbon dioxide
D. Cobalt-60 - 4. Treatment of blood diseases

A B C D
  1. A) 1 2 3 4
  2. B) 4 3 2 1
  3. C) 3 4 2 1
  4. D) 2 1 4 3
With reference to the radioactivity, which of the following statements is/are correct ?

1. Radioactivity is a nuclear property.
2. Hydrogen bomb is prepared on the principle of nuclear fission.

Select the correct answer using the codes given below.
Codes :
  1. A) Only 1
  2. B) Only 2
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
The equator does NOT pass through which of the following Countries ?

1) Gabon
2) Somalia
3) Equatorial Guinea
4) Rawanda

Select the correct answer using the codes given below.
  1. A) 1 and 4
  2. B) 2 and 4
  3. C) 2 and 3
  4. D) 3 and 4
With reference to the electric potential which of the following statements is/are correct?

1. It is a scalar quantity.
2. It is a vector quantity.

Select the correct answer using the codes given below.
Codes :
  1. A) Only 1
  2. B) Only 2
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
Consider the following statements:

1. Scientific investigation depends on commitment to practical ideals.
2 Honesty is particularly important in science.

Select the correct answer from the codes given below:
  1. A) Both statements 1 and 2 are correct
  2. B) Both statements 1 and 2 are incorrect
  3. C) Statement 1 is correct, 2 is not correct
  4. D) Statement 1 is correct, 2 is unpredictable