A mutation inserts two nucleotides in the 23rd codon of a bacterial gene encoding a 60-amino acid protein, eliminating the protein function. Which of these additional changes to the mutant gene is most likely to suppress the effect of the first mutation? O Deletion of two nucleotides from the 3rd codon. Insertion of two nucleotides from the corresponding tRNA anticodon. Insertion of a single nucleotide in the 21st codon. O Deletion of a single nucleotide from the 51st codon. Deletion of a single nucleotide from the 24th codon.

A mutation inserts two nucleotides in the 23rd codon of a bacterial gene encoding a 60-amino acid protein, eliminating the protein function. Which of these additional changes to the mutant gene is most likely to suppress the effect of the first mutation? O Deletion of two nucleotides from the 3rd codon. Insertion of two nucleotides from the corresponding tRNA anticodon. Insertion of a single nucleotide in the 21st codon. O Deletion of a single nucleotide from the 51st codon. Deletion of a single nucleotide from the 24th codon.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter11: Genome Alterations: Mutation And Epigenetics

Section: Chapter Questions

Problem 14QP: In the gene-coding sequence shown here, which of the following events will produce a frameshift...

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A certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).
Which of the following is/are not found in a bacterial mRNA molecule? (a) stop codon (b) upstream leader sequences (c) downstream trailing sequences (d) start codon (e) promoter sequences
The genetic code is defined as a series of _______________ in _______________. (a) anticodons; tRNA (b) codons; DNA (c) anticodons; mRNA (d) codons; mRNA (e) codons and anticodons; rRNA
Which of the following regions on the tRNA are composed of a sequence of nucleotides? a. anticodon that binds to codon in mRNA b. anticodon that binds to codon in ribosomes c. anticodon that binds to codon in tRNA synthetase d. none of the above
Which of the following types of mutation that changes the mRNA sequence after the codon that initiates translation is likely to have the most detrimental effect on the polypeptide product? Group of answer choices a substitution of the first nucleotide of a GGG codon a substitution of the third nucleotide in an ACC codon an insertion of a codon a deletion of two nucleotides a deletion of a codon
What happens when a stop codon is reached by a ribosome? A termination tRNAter binds to the codon and the growing peptide is transferred to it. When the peptidyl-tRNAter reaches the P site, the ribosome dissociates. A separate peptidyl transferase then releases the protein from tRNAter. A termination tRNAter binds to the codon and the growing peptide is transferred to it. When the peptidyl-tRNAter reaches the P site, the ribosome is signaled to release the protein. The ribosome then is likely to dissociate. A release factor binds to the codon and is used to release the growing peptide from the P site tRNA. A termination tRNAter binds to the codon and is used to release the growing peptide from the P site tRNA. The ribosome then is likely to dissociate.
Which 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 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.
Each time a new tRNA is added to the A site, it adds its amino acid to the bottom of the growing chain. Then the ribosome moves to the next codon. Now, this tRNA is in the ________ site, and it is holding the chain of _________________ on top. When the next tRNA is added, the one in the P site will move to the ______ site and it will _______?
Which of the following describes a silent mutation that is undetectable in the final protein sequence? Group of answer choices A base change that codes for a chemically different amino acid A base change that results in a different codon for the same amino aci A base change that codes for a stop codon A base change that codes for a chemically similar amino acid
Which of the following describes the interactions between a codon and an anticodon? A. A codon and an anticodon become covalently bonded together due to the activity of the ribosome. B. A codon and anticodon do not come into direct contact because codons are in the nucleus but anticodons are in the cytoplasm. C. A codon and anticodon are attracted to each other due to hydrogen bonding. D. A codon and an anticodon are linked together by an amino acid. ..
A mutation occurs within a gene sequence but no change is detected in the amino acid sequence. What is the most likely explanation? Mutation occurred in the exon which is spliced out Mutation occurred in the third nucleotide of a codon Mutation occurred in the second nucleotide of a codon Mutation occurred in the first nucleotide of a codon
A gene is a piece of DNA that codes for a protein. Genes are transcribed into mRNA and are on the antisense strand of DNA. A gene contains the following nucleotide sequence: TAC GGC ACC GTA ATT If the following changes occurred in the gene, identify the type of mutation and how it would affect the protein made (amino acid) Changes: Second codon change from GGC to AGC Third adenine base changed to a guanine base Ninth nucleotide changes from C to T Nucleotide with adenine (A) base inserted between 3rd and 4th nucleotide