Q.17.56 - An Introduction to General, Organic, and Biological Chemistry

Question

The following sequence is a portion of the DNA template strand:

TGT GGG GTT ATT

a. Write the corresponding mRNA segment.

b. What are the anticodons of the tRNAs?

c. Write the three-letter and one-letter abbreviations for this segment in the peptide chain.

Step-by-Step Solution

Answer

a. UGU GGG GUU AUU

b. ACA CCC CAA UAAA

c. Cys-Gly-Val-Iso and C-G-V-I

Part (a) Step 1: Given Information

DNA template strand:

TGT GGG GTT ATT

Finding the corresponding mRNA segment. 

Part (a) Step 2: Explanation

T is transformed to U when transcription takes place from the DNA template strand to mRNA.

Hence the corresponding mRNA segment is - UGU GGG GUU AUU 

Part (b) Step 1: Given Information

DNA template strand:

TGT GGG GTT ATT

Finding the anticodons of the tRNAs 

Part (b) Step 2: Explanation

The anticodons of the tRNAs are complementary to mRNA

Hence the anticodons of the tRNAs - ACA CCC CAA UAAA 

Part (c) Step 1: Given Information

DNA template strand:

TGT GGG GTT ATT

Writing the three-letter and one-letter abbreviations for this segment in the peptide chain. 

Part (c) Step 2: Explanation

The three-letter and one-letter abbreviations for this segment in the peptide chain is Cys-Gly-Val-Iso and C-G-V-I