Genes & the Genetic Code (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What two types of molecules do genes code for?
What two types of molecules do genes code for?
Polypeptides & functional RNA
What is the term for the specific position a gene occupies on a DNA molecule?
What is the term for the specific position a gene occupies on a DNA molecule?
Locus
How many different amino acids regularly occur in proteins?
How many different amino acids regularly occur in proteins?
20
How many triplet combinations are possible with four bases?
How many triplet combinations are possible with four bases?
Why is the genetic code described as degenerate?
Why is the genetic code described as degenerate?
Most amino acids coded by >1 triplet
Which amino acid is coded by the start triplet beginning polypeptide sequences?
Which amino acid is coded by the start triplet beginning polypeptide sequences?
Methionine
How many triplets function as stop codons that mark the end of a polypeptide chain?
How many triplets function as stop codons that mark the end of a polypeptide chain?
3
How are six bases numbered 123456 read as triplets in the non-overlapping genetic code?
How are six bases numbered 123456 read as triplets in the non-overlapping genetic code?
123 and 456
What does the universal nature of the genetic code provide indirect evidence for?
What does the universal nature of the genetic code provide indirect evidence for?
Evolution from common origin
What are exons?
What are exons?
Sequences within genes coding for AAs