Concept explainers
(a)
Interpretation: The validation of the given statement that all anticodons involve four bases has to be stated.
Concept introduction: A three-
(b)
Interpretation: The validation of the given statement that codons are found on tRNA molecules has to be stated.
Concept introduction: A three-nucleotide sequence in an mRNA molecule that codes for a specific amino acid is called as codon while an anticodon is a three nucleotide sequence on a tRNA molecule that is complementary to a codon on an mRNA molecule.
(c)
Interpretation: The validation of the given statement that the base U can be present in codons but not in anticodons has to be stated.
Concept introduction: A three-nucleotide sequence in an mRNA molecule that codes for a specific amino acid is called as codon while an anti codon is a three nucleotide sequence on a tRNA molecule that is complementary to a codon on an mRNA molecule.
(d)
Interpretation: The validation of the given statement that the interaction of a codon with an anticodon involves hydrogen bonding has to be stated.
Concept introduction: A three-nucleotide sequence in an mRNA molecule that codes for a specific amino acid is called as codon while an anti codon is a three nucleotide sequence on a tRNA molecule that is complementary to a codon on an mRNA molecule.
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Organic And Biological Chemistry
- What is a codon?arrow_forwardWhich of the following statements about the genetic code are true and which are false? Correct each false statement. a.Each codon is composed of four bases. b.Some amino acids are represented by more than one carbon. c.All codons represent an amino acid. d.Each living species is thought to have its own unique genetic code. e.The codon AUG at the beginning of a sequence is a signal for protein synthesis to begin at that codon. f.It is not known if the code contains stop signals for protein synthesis.arrow_forwardExplain why the base sequence ATC could not be a codon.arrow_forward
- a Describe the three components of a nucleotide. b How does the structure of an RNA nucleotide differ from that of a DNA nucleotide?arrow_forwardDraw the Lewis diagram for the DNA fragment that is complementary to the guanine-thymine-adenine DNA fragment.arrow_forwardHow does the DNA content determine what reactions occur within an organism?arrow_forward
- Describe the experiment that allowed researchers to first identify the codon for a specific amino acid.arrow_forwardIf a codon consists of four nucleotides, how many codons would be possible? Would this be workable as an amino-acid code?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
- In messenger RNA, a codon contains how many nucleotides? a.one b.two c.three d.fourarrow_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_forwardThe DNA template strand segment 3TTCAAACCGTAC5 upon transcription and translation produces the amino acid sequence Lys-Phe-Gly-Met. What is the amino acid sequence produced if a frameshift mutation occurs in which the third A base in the original DNA sequence is removed?arrow_forward
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