Question

In vitro clonal propagation in plants is characterized by

• A. PCR and RAPD
• B. northern blotting
• C. electrophoresis and HPLC
• D. microscopy.

Answer 1

The Correct Option is A

In vitro clonal propagation, commonly known as tissue culture, is a method used to produce plants in large numbers from a single explant. This technique leverages the concept of totipotency — the ability of a single cell to develop into an entire organism. It's widely used for plant multiplication, genetic modification, and conservation of species.

Let's analyze the given options to identify the correct answer:

1. PCR and RAPD:

   PCR (Polymerase Chain Reaction) and RAPD (Random Amplified Polymorphic DNA) are molecular biology techniques employed for DNA amplification and analysis, aiding in genetic analysis and ensuring clonal fidelity. PCR amplifies specific DNA sequences, and RAPD is used for generating DNA profiles or markers.

   This option is directly related to in vitro clonal propagation as it helps in examining the genetic consistency of cloned plants.

2. Northern Blotting:

   This technique involves the detection of RNA sequences and is not directly related to clonal propagation.

3. Electrophoresis and HPLC:

   Electrophoresis is used for separating DNA, RNA, or proteins based on size and charge. HPLC (High-Performance Liquid Chromatography) is used for separating and analyzing compounds. These methods are more related to chemical analysis than directly propagating plants.

4. Microscopy:

   While microscopy can be used to observe plant cells and structures at various stages of tissue culture, it is not directly involved in the clonal propagation process.

Thus, the best option that characterizes in vitro clonal propagation, considering its utility in confirming genetic fidelity and plant quality during tissue culture, is PCR and RAPD.