DNA & Protein Synthesis (AQA A-Level Biology): Flashcards

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Experimental Work Investigating the Role of Nucleic Acids
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Scientist who deciphered genetic code in 1960s

Nirenberg

Type of mRNA used to decipher genetic code

Synthetic mRNA

Purpose of DNase in cell extracts

Remove genomic DNA to prevent interference

Isotope used to label amino acids in experiment

Carbon-14

Amino acid coded by UUU codon

Phenylalanine

Poly U result (radioactivity counts/min)

39,800

Khorana's contribution to genetic code research

Created longer synthetic mRNA with repeating sequences

Total number of possible triplet codons

64

Number of stop codons

3

Degenerate genetic code meaning

Multiple codons can code for same amino acid

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