Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

11. Translation

The Genetic Code

Genetics

11. Translation

The Genetic Code

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Multiple Choice

Which of the following determines the reading frame of an mRNA during translation?

The position of the start codon (AUG)

The number of exons in the mRNA

The length of the poly-A tail

The presence of stop codons

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Verified step by step guidance

Understand that the reading frame of an mRNA during translation refers to how nucleotides are grouped into codons, which are sets of three nucleotides that code for amino acids.

Recognize that translation begins at a specific start codon, which is typically AUG, and this codon sets the initial point for reading the mRNA sequence in triplets.

Know that once the ribosome identifies the start codon, it reads the mRNA in consecutive groups of three nucleotides (codons) from that position onward, establishing the correct reading frame.

Realize that other features such as the number of exons, the length of the poly-A tail, or the presence of stop codons do not determine the initial reading frame; they have different roles in mRNA processing and translation termination.

Conclude that the position of the start codon (AUG) is the key determinant of the reading frame because it signals where translation should begin, ensuring the correct sequence of amino acids is produced.