Experiments involving use of radioactive thymidine to detect distribution of newly synthesized DNA in the chromosome was performed on which plant?
- Vicia faba
- Pisum Satirum
- Cocus nucifera
- Antirrhinum
The Correct Option is A
Solution and Explanation
The question pertains to the use of radioactive thymidine to trace the synthesis of DNA within chromosomes. Let's analyze the given options and discern which plant species were used in such experiments:
- Understanding Radioactive Thymidine: Radioactive thymidine is a radioactive form of thymidine (a nucleoside component of DNA) used in scientific experiments to track DNA synthesis because it gets incorporated into new strands of DNA during replication.
- Choice Analysis:
- Vicia faba: Commonly known as the broad bean, Vicia faba was extensively used in cytogenetic studies, notably in experiments involving radioactive thymidine. Its larger chromosomes allow for easier observation under a microscope.
- Pisum satirum: Also known as the garden pea, it is famous for Mendel's genetic experiments, but not specifically known for studies involving radioactive thymidine.
- Cocus nucifera: The coconut plant, primarily used in studies related to tropical agriculture, does not have a significant history in chromosome marking experiments using radioactive thymidine.
- Antirrhinum: Known for its role in genetics as a model organism, particularly in studying flower development and mutations, but not inherently linked to radioactive thymidine experiments.
- Conclusion: The experiments involving radioactive thymidine for detecting new DNA synthesis in chromosomes were primarily performed on Vicia faba due to its cytogenetically favorable features.
Therefore, the correct answer is Vicia faba.
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Concepts Used:
DNA Replication
The process by which the genome’s DNA is copied in cells is called DNA Replication. It must first copy (or replicate) its entire genome before cell division so that each resulting daughter cell ends up with its own complete genome.
It is the natural cycle of creating two indistinguishable imitations of DNA from one unique DNA molecule. DNA replication happens to take all things together living creatures going about as the most core part for organic legacy. This is important for cell division during the development and fixation of harmed tissues, while it likewise guarantees that every one of the new cells gets its duplicate of the DNA. The phone has the unmistakable property of division, which makes replication of DNA fundamental.
The parental DNA stays together, and the recently shaped daughter strands are together in conservative replication. The semi-conservative strategy recommends that every one of the two parental DNA strands goes about as a format for new DNA to be integrated; after that each two-fold abandoned DNA incorporates one "old" strand (parental) and one "new" strand.