Description : Substitution of a base can result in a (A) Silent mutation (B) Mis-sense mutation (C) Nonsense mutation(D) All of these
Last Answer : Answer : D
Description : A silent mutation is most likely to result from (A) Substitution of the first base of a codon (B) Substitution of the third base of a codon (C) Conversion of a nonsense codon into a sense codon (D) Conversion of a sense codon into a nonsense codon
Last Answer : Answer : B
Description : In the following partial sequence of mRNA, a mutation of the template DNA results in a change in codon 91 to UAA. The type of mutation is 88 89 90 91 92 93 94 GUC GAC CAG UAG GGC UAA CCG (A) Missene (B) Silent (C) Nonsense (D) Frame shit
Description : Haemoglobin S is an example of a/an (A) Silent mutation (B) Acceptable mis-sense mutation (C) Unacceptable mis-sense mutation (D) Partially acceptable mis-sense mutation
Description : Amino acid sequence of the encoded protein is not changed in (A) Silent mutation (B) Acceptable mis-sense mutation (C) Both (A) and (B) (D) None of these
Last Answer : Answer : A
Description : Substitution of a thymine base by adenine in DNA is known as ((A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
Last Answer : Answer : C
Description : Substitution of an adenine base by guanine in DNA is known as (A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
Description : The effect of a mis-sense mutation can be (A) Acceptable (B) Partially acceptable (C) Unacceptable (D) All of these
Description : The nonsense codon(s) is/are A-UAG B-UAA C-UGA D-all of these
Last Answer : all of these
Description : Which of the statements give below is correct with respect to frameshift mutation a) a single nucleotide base change, insertion, or deletion of the genetic material b) Glutamine is replaced by valine c) ... or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Last Answer : d) insertions or deletions of a number of nucleotides in a DNA sequence that is not divisible by three.
Description : A frameshift mutation changes the reading frame because the genetic code (A) Is degenerate (B) Is overlapping (C) Has no punctuations (D) Is universal
Description : The terminal codons are (a) AUG, GUG, GUC (b) UAG, UAA, AGA (c) UAA, UAC, AUG (d) UAA, UAG, UUA
Last Answer : (b) UAG, UAA, AGA
Description : .If the DNA codons are ATG ATG ATG and a cytosine base is inserted at the beginning, then which of the following will result? (a) CAT GAT GAT G (b) A non-sense mutation (c) C ATG ATG ATG (d) CA TGA TGA TG
Last Answer : (a) CAT GAT GAT G
Description : Why does frameshift mutation result in a nonfunctional protein?
Last Answer : What is the answer ?
Description : A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.
Last Answer : c. Has Acquired Dna From The Environment.
Description : Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it? 5′ _____ GAATTC _____ 3′ 3′ _____ CTTAAG _____ 5′ (a) ... completed (b) Deletion mutation (c) Start codon at the 5′ end (d) Palindromic sequence of base pairs
Last Answer : (d) Palindromic sequence of base pairs
Description : Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as ‘start’ or ‘stop’ codon? (a) UCG – Start (b) UUU – Stop (c) UGU – Leucine (d) UAC – Tyrosine
Last Answer : (d) UAC – Tyrosine
Description : A point mutation results from (A) Substitution of a base (B) Insertion of a base (C) Deletion of a base (D) All of these
Description : All the following statements about recognition of a codon on mRNA by an anticodon on tRNA are correct except (A) The recognition of the third base of the codon is not very precise (B) ... degeneracy of the genetic code (D) Wobble results in incorporation of incorrect amino acids in the protein
Description : The codon which serves as translation start signal is (A) AUG (B) UAG (C) UGA (D) UAA
Description : Nonsense codons are present on (A) mRNA (B) tRNA (C) rRNA (D) None of these
Description : What is the Effect of substitution of base and codon?
Last Answer : A substitution is a mutation that exchanges one base for another. Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.
Description : Explain Frameshift mutation? -Biology
Last Answer : answer:
Description : who wants to write an example of a frameshift mutation using the following sentence: THE CAT SAW THE RAT. Which sentence best shows a frameshift mutation?
Last Answer : A. THC ATS AWT HER AT.
Description : Can point mutation be a frameshift mutation?
Last Answer : No
Description : Why does a Frameshift mutation usually cause more defeats during protein synthesis than a point mutation?
Last Answer : Need answer
Description : Which of the following serves as a terminal codon? (a) UAG (b) AGA (c) AUG (d) GCG
Last Answer : b) AGA
Description : .Initiation codon in eukaryotes is (a) GAU (b) AGU (c) AUG (d) UAG
Last Answer : d) UAG
Description : Which of the following is initiation codon? (a) UAG (b) AUC (c) AUG (d) CCU
Last Answer : b) AUC
Description : Which one of the following is the starter codon? (a) UAA (b) UAG (c) AUG (d) UGA
Last Answer : (c) AUG
Last Answer : a) UAG
Description : Initiation codon in eukaryotes is (a) GAU (b) AGU (c) AUG (d) UAG
Description : .Which of the following is initiation codon? (a) UAG (b) AUC (c) AUG (d) CCU
Description : Which of the termination codon is called amber? A- UAA B- UAG C- UGA D- AUG
Last Answer : UAG
Description : Which stop codon has been found to encode selenocysteine? A- UAA B- UAG C- UGA D-.AGA
Last Answer : UGA
Description : UAG is a. Start codon b. Stop codon c. Open frame d. End frame
Last Answer : b. Stop codon
Description : Which one of the following could NOT cause a change in the mRNA ―reading frame‖? a. Insertion Sequence b. Base-Pair Substitution c. Base Addition d. Base Deletion
Last Answer : b. Base-Pair Substitution
Description : .The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon
Last Answer : (d) recognition of an anti-codon.
Description : The first phase of translation is (a) binding of mRNA to ribosome (b) recognition of DNA molecule (c) aminoacylation of tRNA (d) recognition of an anti-codon.
Last Answer : c) aminoacylation of tRNA
Description : A part of an mrna has the base sequence gca. which change to this sequence would indicate a missense mutation?
Last Answer : A missense mutation is the change in a single nucleotide that results in a different amino acid being coded for. GCA codes for the amino acid Alanine. Therefore any of the following changes would be missense ... acid GUA -> Valine GGA -> Glycine CCA -> Proline UCA -> Serine ACA -> Threonine
Description : Which enzyme will be produced in a cell if there is a nonsense mutation in the lac Y gene? (a) Transacetylase (b) Lactose permease and transacetylase (c) β-galactosidase (d) Lactose permease
Last Answer : β-galactosidase
Description : Which one of the following causes frame shift mutation? (A) Transition (B) Transversion (C) Deletion (D) Substitution of purine to pyrimidine
Description : The most likely lethal mutation is (A) Substitution of adenine for cytosine (B) Insertion of one nucleotide (C) Deletion of three nucleotides (D) Substitution of cytosine for guanine