Previous year MCQs

General science UPPSC 1999 GS-I
Question

What is the function of a pace maker?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: It regulates the heart beat

Detailed Solution:

The correct answer is “It regulates the heart beat”.
A pacemaker is an electronic device that's implanted in the body to help regulate the heart's rate and rhythm. It sends electrical pulses to the heart to signal it to beat when it's too slow or irregular. Pacemakers can also help the heart's chambers beat in sync, which can help the heart pump blood more efficiently.

Similar Questions:

Consider the following statements:

Assertion (A): India's nuclear policy incorporates its unpreparedness to open its nuclear plants for international inspection.
Reason (R): India will not produce any nuclear bomb.

Select your answer from the code given below:
  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
  3. C) (A) is true and (R) is false
  4. D) (A) is false but (R) is true
According to the report of the World Tourist Organisation for the year 1997, the maximum number of tourist visited:
  1. A) France
  2. B) Switzerland
  3. C) Germany
  4. D) United states of America
Which one of the following compounds is used as a sedative?
  1. A) Potassium bromide
  2. B) Calcium chloride
  3. C) Ethyl alcohol
  4. D) Phosphorus trichloride
Which of the following is found in the composition of vitamin D?
  1. A) Retinal
  2. B) Folic acid
  3. C) Ascorbic acid
  4. D) Calciferol
When there is a decrease in the concentration of oxygen in the blood, the rate of breathing:
  1. A) decreases
  2. B) increases
  3. C) does not change
  4. D) first decreases, then increases
Consider the following statements:

Assertion (A): Only two major rivers of Peninsular India Narmada and Tapti flow in the Arabian Sea.
Reason (R): These rivers are fault-guided.

Select the correct answer from the code given below:
Code:
  1. A) Both A and R are correct and R is the correct explanation of A
  2. B) Both A and R are correct, But R is not the correct explanation of A
  3. C) A is correct but R is false
  4. D) A is false but R is correct
A Ball thrown outside from an artificial satellite revolving round the Earth will:
  1. A) Go on the Sun
  2. B) Go on the Moon
  3. C) Fall on the Earth
  4. D) Revolve round the Earth in the same orbit with the same time period as satellite
Which one of the following is a rich source of iron?
  1. A) Carrot
  2. B) Pea
  3. C) Rice
  4. D) Spinach
The Chitragupta Swami Temple considered to be the only temple of Chitragupta is situated in:
  1. A) Kanchi
  2. B) Mathura
  3. C) Puri
  4. D) Ujjain
Which of the following tree is suitable to prevent dust pollution?
  1. A) Sita Ashok
  2. B) Mahua
  3. C) Poplar
  4. D) Neem
Harmful ultra-violet radiation coming from the sun can cause:
  1. A) Liver cancer
  2. B) Brain cancer
  3. C) Oral cancer
  4. D) Dermal cancer
Human heart is made up of how many chambers?
  1. A) Only four
  2. B) Only one
  3. C) Only three
  4. D) Only two