Previous year MCQs

UPPSC 2012 GS-1 General science
Question

Who had proposed for the first time the double helix model of DNA?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Watson and Crick

Detailed Solution:

The correct answer is “Watson and Crick”.
Double helical structure of DNA was proposed by James Watson and Francis Crick in 1953.

Similar Questions:

Bauxite is an ore of:
  1. A) Lead
  2. B) Aluminium
  3. C) Zinc
  4. D) Copper
Money Bill is introduced in
  1. A) Lok Sabha
  2. B) Rajya Sabha
  3. C) Joint sitting of both the Houses
  4. D) None of the above
Which color combination is best suited for umbrella to protect from sunlight (stinter)?
  1. A) White on the upper and black in the inner side
  2. B) Black on the upper and white in the inner side
  3. C) Only black
  4. D) Only white
Which is a celestial phenomenon occurring due to stars:
  1. A) Ozone hole
  2. B) Black hole
  3. C) Rainbow
  4. D) Comet
The first Indian State to pass the Lokayukta bill in 2011 is
  1. A) Uttar Pradesh
  2. B) Bihar
  3. C) Uttarakhand
  4. D) Jharkhand
The most important part of a computer is
  1. A) CPU
  2. B) Key Board
  3. C) Disc
  4. D) Printer
When a body is taken from the earth to the moon
  1. A) Its weight increases
  2. B) Its weight decreases
  3. C) Its weight remains unchanged
  4. D) It becomes completely weightless
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R)

Assertion (A) : Relative humidity decreases with increasing air temperature.
Reason (R) : Absolute humidity increases with increasing evaporation.

Select the correct answer from the codes given below:
  1. A) Both(A) and (R) are true, but (R) is not the correct explanation of(A).
  2. B) (A) is false, but (R) is true
  3. C) Both (A) and (R) are true and (R) is the correct explanation of (A)
  4. D) (A) is true, but (R)is false.
Which of the following is the main component of the natural gas?
  1. A) Ethane
  2. B) Butane
  3. C) Carbon mono-oxide
  4. D) Methane
Which one of the following diseases is not transmitted by tiger mosquitoes?
  1. A) Yellow fever
  2. B) Dengue
  3. C) Chikungunya
  4. D) Japanese Encephalitis
Pungency in chillies is due to the presence of
  1. A) Lycopine
  2. B) Capsaicin
  3. C) Carotene
  4. D) Anthocyanin
Chemical name of limestone is?
  1. A) Calcium carbonate
  2. B) Magnesium chloride
  3. C) Sodium chloride
  4. D) Sodium sulphide