AP Biology 6.4 Translation and Phenotype
Practise AP Biology 6.4 questions by connecting codons, tRNA, ribosomes and translation with protein sequences, phenotype and information flow.
- Syllabus
- Effective Fall 2025
- Course
- AP Biology
Exam points
- explain how codons, tRNA and ribosomes determine an amino-acid sequence
- calculate amino-acid number from mRNA length and account for start and stop codons
- interpret codon usage, tRNA abundance, mRNA stability and translation-rate data as controls of protein output
- compare prokaryotic cotranscriptional translation, the shared genetic code and reverse-transcription information flow
Covered syllabus points
6.4 Translation question 1
[Maximum number: 1]
Most proteins that are secreted from a cell must be transported to the endoplasmic reticulum
(ER) either during translation or after translation.
C.
Protein 1 is encoded by 234 nucleotides, while protein 2 is encoded by 495 nucleotides.
Assuming all nucleotides for both proteins encode amino acids, calculate the difference
in the number of amino acids between the two proteins.
Protein 1 is encoded by 234 nucleotides, while protein 2 is encoded by 495 nucleotides. Assuming all nucleotides for both proteins encode amino acids, calculate the difference in the number of amino acids between the two proteins.
- 87 (amino acids) [(495/3)-(234/3)]
Point C3
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