Multiple choice

A gene is a

  1. a type of body cell

  2. sleep inducing drug

  3. a kind of vitamin

  4. unit of heredity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A gene is a molecular unit of heredity of a living organism. It is a name given to some stretches of DNA and RNA that code for a polypeptide or for an RNA chain that has a function in the organism. Living beings depend on genes, as they specify all proteins and functional RNA chains.

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