dna, genes and chromosomes - 4 Flashcards

topic 2

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1
Q

what do histone proteins do

A

help support the dna

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2
Q

each amino acid is coded for by a sequence of 3 bases in a gene called what

A

a triplet or codon

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3
Q

what is the first step of protein synthesis

A

dna is copied into the messenger rna

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4
Q

what is functional rna

A

molecules other than mrna which perform special tasks during protein synthesis

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5
Q

what are introns

A

genes that code for polypeptides and don’t code for amino acids

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6
Q

what are exons

A

all the parts of a gene that do code for an amino acid

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