With reference to the latest developments in stem cell research consider the following statements 1 ...........

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With reference to the latest developments in stem cell research, consider the following statements

1.The only source of human stem cells are the embryos at blastocyst stage

2.The stem cells can be derived without causing destruction to blastocysts

3.The stem cells can regenerate themselves in vitro virtually forever

4.Indian research centres also created a few cell lines which can be developed into many types of tissues.

How many of the statements given above are correct?

Only One

Only Two

Only Three

All Four

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Explanation:

Incorrect: Human stem cells are not only sourced from embryos at the blastocyst stage. There are also adult stem cells and induced pluripotent stem cells (iPSCs), which are reprogrammed from adult cells.

Correct: Recent techniques allow for the derivation of stem cells without the destruction of blastocysts.

Correct: Stem cells, especially embryonic stem cells, can regenerate themselves in vitro for prolonged periods, often considered virtually forever under the right conditions.

Correct: Indian research centers have made progress in stem cell research, including the creation of various cell lines that can develop into many types of tissues.

Therefore, three statements (2, 3, and 4) are correct.