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
Last Answer : Answer : B
Description : Which stop codon has been found to encode selenocysteine? A- UAA B- UAG C- UGA D-.AGA
Last Answer : UGA
Description : The codon which serves as translation start signal is (A) AUG (B) UAG (C) UGA (D) UAA
Last Answer : Answer : A
Description : The stretch of codons between AUG and a stop codon is called a) open reading frame b) TATA box c) colinearity d) degenerate
Last Answer : a) open reading frame
Description : If the codon UAC on mRNA changes into UAG as a result of a base substitution in DNA, it will result in (A) Silent mutation (B) Acceptable mis-sense mutation (C) Nonsense mutation (D) Frameshift mutation
Last Answer : Answer : C
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 : The nonsense codon(s) is/are A-UAG B-UAA C-UGA D-all of these
Last Answer : all of these
Description : Consider the following statements: The genetic code said to be degenerate and universal which means that, (1) Amino afids may have more than one codon (2) All amino acids have mo than one codon (3) Codons are common for higher and lower organism (4) Codons are not found in bacteria
Last Answer : Ans. ((d))
Description : The Shine-Dalgarno sequence is A- trailer sequence B- a stop codon C- the reading frame of a gene D- a short sequence that acts as a ribosomal binding site
Last Answer : a short sequence that acts as a ribosomal binding site
Description : Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid? (a) AUG, ACG - Start/methionine (b) UUA, UCA - Leucine (c) GUU, GCU - Alanine (d) UAG, UGA - Stop
Last Answer : (b) UUA, UCA - Leucine
Last Answer : (d) UAG, UGA - Stop
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 : 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 : In fern, vascular bundles are: (a) Radial (b) Hadrocentric (c) Open (d) Leptocentric
Last Answer : Ans. ((b))
Description : Flowers which never open are called as
Last Answer : Flowers which never open are called as – Cliestogamous flowers
Description : The process involving emasculation of the flower before anthesis and depositing pollen grains on the cut end of the ovary is called as
Last Answer : The process involving emasculation of the flower before anthesis and depositing pollen grains on the cut end of the ovary is called as – Intra-ovarian pollination
Description : Considering corms of natural vegetative propagation, buds are present at a) Front side of corm b) Backside of corm c) Top of corm d) End of corm
Last Answer : c) Top of corm
Description : Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) Phragmoplast comprises intrazonal microtubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
Last Answer : Ans. ((a))
Description : Difference between termination signal and stop codon. -Biology
Last Answer : answer:
Description : Where is the stop codon located? -Biology
Description : Is the stop codon an amino acid? -Biology
Description : What happens when the ribosome reaches a stop codon? -Biology
Description : In biosynthesis of proteins the chain terminating codons are (A) UAA, UAG and UGA (B) UGG, UGU and AGU (C) AAU, AAG and GAU (D) GCG, GCA and GCU
Description : The codons causing chain termination are (a) AGT, TAG, UGA (b) UAG, UGA, UAA (c) TAG, TAA, TGA (d) GAT, AAT, AGT
Last Answer : (b) UAG, UGA, UAA
Last Answer : b) UAG, UGA, UAA
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 : eIF-4 B (A) Binds to 3’ chain initiation codon on mRNA (B) Binds to 3’ end of mRNA (C) Binds to 5’ end of mRNA (D) Unwinds mRNA near its 5’ end
Last Answer : Answer : D
Description : All the following statements about tRNA are correct except (A) A given tRNA can be charged with only one particular amino acid (B) The amino acid is recognized by the anticodon of tRNA (C) The amino acid is attached to end of tRNA (D) The anticodon of tRNA finds the complementary codon on mRNA
Description : RNA is composed of strands of nucleotides that are read as a 3 nucleotide codon. These are distinguished by tRNAs that match the codons on one end and carry individual building blocks of a protein chain. What are these building blocks of protein that tRNAs bind?
Last Answer : Amino Acids
Description : What is the start codon? -Biology
Description : Where is the start codon located? -Biology
Description : Is AUG a start codon? -Biology
Description : Why is the start codon necessary? -Biology