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Give one word for the following. a....

Give one word for the following.
a. Genes that are constantly requires for cellular activities.
b. Sequences of nitrogen bases in mRNA containing the information for protein synthesis.
c. Transcription of DNA from RNA
d. A segment of DNA
e. Synthesis of DNA from pre-existing DNA.
f. Small genetic unit that can mutate

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a. House keeping gene b. Genetic code c. Reverse transcription d. Gene e. Replication f. Muton
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