Previous year MCQs

General science UPPSC 2024 GS-I
Question

The only vein that carries oxygenated blood is:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Pulmonary vein

Detailed Solution:

The correct answer is “Pulmonary vein”.

The pulmonary vein is the only vein in the human body that carries oxygenated blood. It transports oxygen-rich blood from the lungs to the left atrium of the heart, in contrast to other veins that typically carry deoxygenated blood back to the heart.

Similar Questions:

Study of Zoology deals with:
  1. A) Living animals only
  2. B) Living plants only
  3. C) Both living and dead animals
  4. D) Both living and dead plants
Desert dwelling animals are called -
  1. A) Arboreal animals
  2. B) Terrestrial animals
  3. C) Fossorial animals
  4. D) Xericoles animals
When a glass rod is placed in steam, its length increases but its width:
  1. A) remains unchanged
  2. B) decreases
  3. C) increases
  4. D) becomes irregular
Thiamin is:
  1. A) Vitamin C
  2. B) Vitamin B2
  3. C) Vitamin B6
  4. D) Vitamin B1
Match List-I with List-il and choose the correct answer using the codes given below the lists:
List-I - List-il
(Coal Resources) (States)

A. Hutar - 1. Madhya Pradesh
B. Ib River - 2. Chhattisgarh
C. Tatapani - Ramkola - 3. Odisha
D. Umaria - 4. Jharkhand

Codes:
A B C D
  1. A) 3,2,4,1
  2. B) 2,1,3,4
  3. C) 4,3,2,1
  4. D) 4,2,3,1
The joint where the neck joins the head is:
  1. A) Pivotal joint
  2. B) Saddle joint
  3. C) Hinge joint
  4. D) Ball and socket joint
Consider the following statements with reference to cultivated area of some countries of the world:

1. In comparison to USA, China and Japan, India has highest geographical area under cultivation.
2. India's location in tropical monsoon, region helps diversified cropping all through the year.

Which of the above statements is/are correct?
  1. A) Both 1 and 2
  2. B) Neither 1 nor 2
  3. C) Only I
  4. D) Only 2
Photo chemical smog always contains
  1. A) Phosphorus
  2. B) Ozone
  3. C) Methane
  4. D) Aluminium ion
The energy of the sun is produced by?
  1. A) Ionisation
  2. B) Nuclear fusion
  3. C) Nuclear fission
  4. D) Oxidation
An artificial satellite can be tracked very precisely from the earth by using:
  1. A) Doppler effect
  2. B) Radar
  3. C) Sonar
  4. D) Pulsar
In National Parks, Genetic diversity is maintained by
  1. A) In-situ conservation
  2. B) Ex-situ conservation
  3. C) Genepool
  4. D) None of the above
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.