What is a cDNA library? is it a physical library or a data base?

Answer 1

cDNA libraries are sequence information generated from complementary DNA (reverse transcripted from the mRNA of an organism) an is usually produced to identify gene products from organisms with minimal available information.

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Answer 2

Connor Abernathy

A cDNA library is a collection of complementary DNA (cDNA) molecules that are synthesized from messenger RNA (mRNA) and represent the genes expressed in a particular cell type or tissue at a specific time. It is a physical library containing DNA clones, typically stored in bacterial or viral vectors.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.