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Consider the following statements about stem cells :
1. Stem cells have the potential for self-renewal via mitotic cell division.
2. In 1908, James Thomas and his colleagues first derived human embryonic stem cells from donated blastocysts through in vitro fertilization.
Which of the statements given above is/are correct?
Explanation
Statement 1 is correct: Stem cells are characterized by their ability to undergo self-renewal, where they divide via mitosis to produce more stem cells of the same type, thereby maintaining the stem cell pool. They also possess the unique ability to differentiate into specialized cell types.
Statement 2 is incorrect: Human embryonic stem cells (hESCs) were first isolated and grown in a lab by James Thomson (not Thomas) and his team at the University of Wisconsin-Madison in 1998, not 1908. These cells were derived from the inner cell mass of blastocysts produced through in vitro fertilization (IVF) for clinical purposes and donated for research. While the term "stem cell" was proposed by Alexander Maximow in 1908 in the context of hematology, the actual derivation of human embryonic stem cells is a modern biotechnological achievement.
SIMILAR QUESTIONS
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 a 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 Which of these statements are correct?
Consider the following statements : 1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent. 2. A person's genome can be edited before birth at the early embryonic stage. 3. Human induced pluripotent stem cells can be injected into the embryo of a pig. Which of the statements given above is/are correct ?
Consider the following statements regarding osmosis in animal cells : 1. If the water potential of the solution surrounding the cell is too high, the cell shrinks. 2. If the water potential of the solution surrounding the cell is too low, the cell swells and bursts. 3. It is important to maintain a constant water potential inside the animal body. 4. In animal cells, water potential far exceeds the solute potential. Which of the statements given above is/are correct?
Consider the following statements in respect of cell and its structure :
I. All cells possess cell wall.
II. All cells have ribosomes present inside.
III. All cells have well-organized nucleus.
IV. All cells have linear DNA molecules present in them.
Which of the statements given above is/are correct?