Concept explainers
(a)
Interpretation:
The sequence of the DNA template strand from which the mRNA was synthesized, and the peptide synthesized by the mRNA should be written considering the
Concept Introduction:
Conversion of genetic information in DNA into mRNA is called transcription. The DNA strand from the DNA double helix which is used for mRNA synthesis is the template strand. Transcription proceeds from 3' end to 5' end. Complementary base pairing determines which nucleotide should add to the growing chain of mRNA.
This mRNA strand provides code for the synthesis of polypeptide chain with 20 different amino acids. A sequence of three nucleotides which is called a codon codes for a specific amino acid. There are 4 types of nucleotides found in RNA strand which are A, C, G and U. These four nucleotides can be combined in 64 different ways to make codons with three nucleotides. From these, only 61 codes for amino acids. Other three does not correspond to any of the amino acid, so, they are called stop codons.
(b)
Interpretation:
The sequence of the DNA template strand from which the mRNA was synthesized, and the peptide synthesized by the mRNA should be written considering the nucleotide sequence given in the mRNA molecule.
Concept Introduction:
Conversion of genetic information in DNA into mRNA is called transcription. The DNA strand from the DNA double helix which is used for mRNA synthesis is the template strand. Transcription proceeds from 3' end to 5' end. Complementary base pairing determines which nucleotide should add to the growing chain of mRNA.
This mRNA strand provides code for the synthesis of polypeptide chain with 20 different amino acids. A sequence of three nucleotides which is called a codon codes for a specific amino acid. There are 4 types of nucleotides found in RNA strand which are A, C, G and U. These four nucleotides can be combinedin 64 different ways to make codons with three nucleotides. From these, only 61 codes for amino acids. Other three does not correspond to any of the amino acid, so, they are called stop codons.
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CONNECT IA GENERAL ORGANIC&BIO CHEMISTRY
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- Suppose that 28% of the nucleotides in a DNA molecule are deoxythymidine 5'-monophosphate, and that during DNA replication the percentage amounts of available nucleotide bases art 22% A, 22% C, 28% G. and 28% T. Which base would be depleted first in the replication process?arrow_forwardGiven the following nucleotide sequence in DNA: 5'ACGCGATTC3': (a) Determine the sequence of the complementary strand of DNA. Report this sequence by writing it from its 5' end to its 3' end. (b) Write the sequence (5'-3r) for the strand of mRNA that would be complementary to the original strand of DNA. (c) Assuming that this sequence is part of the coding sequence for a protein and that it is properly lined up so that the first codon of this sequence begins with the 5' nucleotide of the mRNA, write the sequences for the three anti- codons that would be complementary to this strand of mRNA. (d) What sequence of amino acids is selected by this mRNA? (The complete genetic code is listed in several sites on the Internet.)arrow_forwardGiven the following nucleotide sequence in DNA: 5' TCGTAGGAT 3': (a) Determine the sequence of the complementary strand of DNA. Report this sequence by writing it from its 5' end to its 3' end. (b) Write the sequence (5'-3') for the strand of mRNA that would be complementary to the original strand of DNA. (c) Assuming that this sequence is part of the coding sequence for a protein and that it is properly lined up so that the first codon of this sequence begins with the 5' nucleotide of the mRNA, write the sequences for the three anti- codons that would be complementary to this strand of mRNA. (d) What sequence of amino acids is selected by this mRNA? (The complete genetic code is listed in several sites on the Internet.)arrow_forward
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