With reference to the recent developments in science, which one of the following statements is not correct?
A
Functional chromosomes can be created by joining segments of DNA taken from cells of different species.
B
Pieces of artificial functional DNA can be created in laboratories.
C
A piece of DNA taken out from an animal cell can be made to replicate outside a living cell in a laboratory.
D
Cells taken out from plants and animals can be made to undergo cell division in laboratory petri dishes.
Correct Answer: Option A
Explanation
1. Statement (A) is likely *not correct* in the sense of creating stable, fully functional chromosomes by simply joining segments of DNA from different species. While genetic engineering allows for gene transfer, creating entirely new, viable chromosomes by mixing DNA from different species in this manner is highly complex and generally not a standard achievable outcome, especially regarding full functionality.
2. Statement (B) is correct. Synthetic biology enables the creation of artificial functional DNA segments in laboratories through processes like gene synthesis.
3. Statement (C) is correct. Techniques like the Polymerase Chain Reaction (PCR) allow a specific piece of DNA to be amplified (replicated) millions of times outside a living cell in a laboratory.
4. Statement (D) is correct. Cell culture techniques are well-established, allowing cells taken out from plants and animals to be grown and made to undergo cell division in vitro (e.g., in laboratory petri dishes) under appropriate conditions.
5. Therefore, statement (A) represents the least feasible or accurate claim among the options regarding recent developments in science.