UPSC CSE Prelims
Question 56
With reference to 'stem cells', frequently in the news, which of the following statements is/are correct?
- Stem cells can be derived from mammals only.
- Stem cells can be used for screening new drugs.
- Stem cells can be used for medical therapies.
Select the correct answer using the codes given below:
View correct answer and explanation
Correct answer: B
Correct Option: B
Explanation: Stem cells are found beyond mammals and have applications in drug testing and regenerative medicine.
Statement/Item-wise Analysis:
1: Incorrect - Plant stem cells and stem-cell-like populations in other animals contradict the mammals-only claim.
2: Correct - Stem-cell-derived cells allow researchers to test candidate medicines.
3: Correct - Stem-cell therapies include haematopoietic stem-cell transplantation and other developing applications.
Option-wise Analysis:
A: Incorrect - includes incorrect item 1; omits correct item 3.
B: Correct - includes exactly the valid statements/items and excludes the invalid ones.
C: Incorrect - omits correct item 2.
D: Incorrect - includes incorrect item 1.