Question

For the formation of oxytocin below, illustrate how a segment of DNA is expressed as a polypeptid sequence. Be sure that you clearly draw and label the DNA transcription, and translation. Amino acid sequence for oxytocin is Gly Leu Pro Cys Asn Glu ile Tyr Cys

Answer 1

Transcription is a process by which RNA is synthesized from DNA. There are two strands in DNA. One is the Template strand, from which the RNA is actually transcribed. This strand is also called an antisense strand. The other strand is called the Coding strand, which actually specifies the amino acid sequence in the protein. It is also called a Sense strand.

DNA dependent RNA polymerase is the enzyme involved in transcription. They can polymerize the RNA in the only direction 5' - 3'.

The translation is a process by which protein is synthesized from mRNA with the help of ribosome and tRNA. tRNA brings the correct amino acid. tRNA has the anticodon sequence with which they base pairs with the mRNA. The ribosome is the location where translation takes place.

Transcription Template strand Antisense stond 3CCTAAT GGA ACA TTA CTI TAA ATA ACA Ол бA TTA ccTTT AA ThPP Атт Төттопт Coding strona/sense strand 51 URNA Transcription. Anticodon CGA VUA CCOUOU AAU GAA AUU UAU UCUal 51 mRNA Translation: tRNA brings the correct camino acid according to the codons present in the mRNAI y GlyLea Poo Cys Asn Glu Ile Tyo Cys

Transcorption T 51 x - 31 Coding stramd. 5/ Template Strand 3) e RNA polymerase 57 Pre MRNA splicing 3) mature mRNA

o Translation TRNA Ribosome 3) There are three sites in ribosome. A site : Altachment site P site : Peptide foroming Ipolymerization site Esile: Exit site: