Question

An effective tool for screening a large number of genetic sequences at once is known as ) ______

A) gel electrophoresis.
B) cDNA synthesis.
C) microarray.
D) FISH.
E) restriction analysis.

Answer 1

The correct answer is microarray, which is a tool used for simultaneously screening a large number of genetic sequences. Gel electrophoresis separates DNA fragments by size but doesn't screen multiple sequences at once. PCR amplifies specific DNA sequences but also doesn't screen multiple sequences simultaneously.answer is option C.

Step-by-step explanation:

An effective tool for screening a large number of genetic sequences at once is known as microarray (option C). Microarray analysis allows researchers to simultaneously monitor the expression levels of thousands of genes, making it a powerful tool for genetic research and diagnosis. Other techniques such as gel electrophoresis, cDNA synthesis, and FISH (Fluorescence In Situ Hybridization) serve different purposes in genetic analysis.

Gel electrophoresis is a method used to separate DNA fragments based on size, and it can give information about the DNA sequence by generating a banding pattern downstream of processes like restriction enzyme digestion. However, it does not allow for the screening of large numbers of sequences simultaneously. PCR (Polymerase Chain Reaction) is another important technique which can amplify specific DNA sequences rapidly for further examination, but it does not perform screening of multiple sequences at the same time. Southern blot analysis involves hybridization but does not screen multiple genetic sequences simultaneously.