The following sequence represents the dsDNA code for a short peptide 5' -CTT TCC CAT CAC CGC ATG CAT CCT CCC TCC TTT CTT TAA TAT TGG-3' 3'-GAA AGG GTA GTG GCG TAC GTA GGA GGG ACC AAA GAA ATT ATA ACC-5' Transcribe the DNA strand given above to write the sequence of the mRNA strand in the 5’ to 3’ direction. (1) Use the table and write the sequence of the resulting peptide. (1) Is it possible for a codon to code for another amino acid? (1) What will be the effect if a mutation changes the codon UAU to UAA? (1) What is a reading frame? (1) If you are given a nucleotide sequence, how would you find Open Reading Frames? (1)
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
The following sequence represents the dsDNA code for a short peptide
5' -CTT TCC CAT CAC CGC ATG CAT CCT CCC TCC TTT CTT TAA TAT TGG-3'
3'-GAA AGG GTA GTG GCG TAC GTA GGA GGG ACC AAA GAA ATT ATA ACC-5'
- Transcribe the DNA strand given above to write the sequence of the mRNA strand in the 5’ to 3’ direction. (1)
- Use the table and write the sequence of the resulting peptide. (1)
- Is it possible for a codon to code for another amino acid? (1)
- What will be the effect if a mutation changes the codon UAU to UAA? (1)
- What is a reading frame? (1)
- If you are given a
nucleotide sequence, how would you find Open Reading Frames? (1)
DISCUSS the reason why there are leading and lagging strands in replication?
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