CHEMISTRY-STD.GDE.W/SOLN.MAN.(LOOSE)
CHEMISTRY-STD.GDE.W/SOLN.MAN.(LOOSE)
12th Edition
ISBN: 9780134024332
Author: Timberlake
Publisher: PEARSON
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Question
Chapter 17, Problem 17.77CQ
Interpretation Introduction

To determine: The number of nucleotides that are present in the mRNA, such that a polypeptide oxytocin containing 9 amino acids is formed.

Expert Solution & Answer
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Answer to Problem 17.77CQ

Solution:

A peptide chain of 9 amino acids have amino acids linked to each other. Each amino acid is encoded by a triplet of nucleotide known as codon.

For initiating the protein formation, a start codon is required and for termination, a stop codon is required.

For 9 amino acids: 9×3 + 3 (start codon) + 3 (stop codon) = 33 nucleotides .

Explanation of Solution

For initiation of protein synthesis, a start codon (AUG) is required so that the first amino acid is methionine. After that tRNA comes with amino acid and base pairs with mRNA to form a polypeptide chain. For the termination of peptide chain, stop codon (UAA, UAG and UGA) is required to stop the peptide formation or translation.

Each amino acid is coded by 3 bases due to which 9 amino acids are coded by 27 bases and for a peptide chain again 3 bases are required which are start codon (AUG) and for terminating the chain, a stop codon is also required and 3 bases are required for that as well. So, total of 33 nucleotide bases are required.

Conclusion

Hence, for 9 amino acids: 9×3 + 3 (start codon) + 3 (stop codon) = 33 nucleotides .

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Chapter 17 Solutions

CHEMISTRY-STD.GDE.W/SOLN.MAN.(LOOSE)

Ch. 17.2 - Prob. 17.11QAPCh. 17.2 - Prob. 17.12QAPCh. 17.2 - Prob. 17.13QAPCh. 17.2 - Prob. 17.14QAPCh. 17.3 - Prob. 17.15QAPCh. 17.3 - Prob. 17.16QAPCh. 17.3 - Write the base sequence in a complementary DNA...Ch. 17.3 - Prob. 17.18QAPCh. 17.4 - Prob. 17.19QAPCh. 17.4 - Prob. 17.20QAPCh. 17.4 - Prob. 17.21QAPCh. 17.4 - Prob. 17.22QAPCh. 17.4 - Write the corresponding section of mRNA produced...Ch. 17.4 - Write the corresponding section of mRNA produced...Ch. 17.4 - What is a codon?Ch. 17.4 - Prob. 17.26QAPCh. 17.4 - Prob. 17.27QAPCh. 17.4 - Prob. 17.28QAPCh. 17.4 - Prob. 17.29QAPCh. 17.4 - Prob. 17.30QAPCh. 17.5 - Prob. 17.31QAPCh. 17.5 - Why are there at least 20 different tRNAs?Ch. 17.5 - Prob. 17.33QAPCh. 17.5 - Prob. 17.34QAPCh. 17.5 - Prob. 17.35QAPCh. 17.5 - Prob. 17.36QAPCh. 17.5 - Prob. 17.37QAPCh. 17.5 - Prob. 17.38QAPCh. 17.6 - Prob. 17.39QAPCh. 17.6 - Prob. 17.40QAPCh. 17.6 - Prob. 17.41QAPCh. 17.6 - Prob. 17.42QAPCh. 17.6 - How is protein synthesis affected if the normal...Ch. 17.6 - Prob. 17.44QAPCh. 17.6 - Prob. 17.45QAPCh. 17.6 - Prob. 17.46QAPCh. 17.6 - Prob. 17.47QAPCh. 17.6 - Prob. 17.48QAPCh. 17.7 - Prob. 17.49QAPCh. 17.7 - Prob. 17.50QAPCh. 17.7 - Prob. 17.51QAPCh. 17.7 - Prob. 17.52QAPCh. 17.7 - Prob. 17.53QAPCh. 17.7 - Prob. 17.54QAPCh. 17.7 - Prob. 17.55UTCCh. 17.7 - Suppose a mutation occurs in the DNA section in...Ch. 17.7 - Prob. 17.57AQAPCh. 17.7 - Prob. 17.58AQAPCh. 17.7 - Prob. 17.59AQAPCh. 17.7 - Prob. 17.60AQAPCh. 17.7 - Prob. 17.61AQAPCh. 17.7 - Prob. 17.62AQAPCh. 17.7 - Prob. 17.63AQAPCh. 17.7 - Prob. 17.64AQAPCh. 17.7 - Prob. 17.65AQAPCh. 17.7 - Prob. 17.66AQAPCh. 17.7 - Prob. 17.67AQAPCh. 17.7 - Prob. 17.68AQAPCh. 17.7 - Prob. 17.69AQAPCh. 17.7 - Prob. 17.70AQAPCh. 17.7 - Prob. 17.71AQAPCh. 17.7 - Prob. 17.72AQAPCh. 17.7 - Prob. 17.73AQAPCh. 17.7 - Prob. 17.74AQAPCh. 17.7 - Prob. 17.75AQAPCh. 17.7 - Prob. 17.76AQAPCh. 17 - Prob. 17.77CQCh. 17 - A polypeptide contains 36 amino acids. How many...Ch. 17 - Prob. 17.79CQCh. 17 - Prob. 17.80CQCh. 17 - Prob. 17.81CQCh. 17 - Prob. 17.82CQ
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