Description : What is a section of DNA molecule that carries the genetic code for a particular trait?
Last Answer : Need answer
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
Last Answer : Answer : D
Description : Genetic code is said to be degenerate because (A) It can undergo mutations (B) A large proportion of DNA is non-coding (C) One codon can code for more than one amino acids (D) More than one codons can code for the same amino acids
Description : In the regulation of genes: a. more than 90% of the base sequences in human DNA have not known function b. extrons are the part of the gene that code for amino acids found in the final proteins. c. introns usually begins with the nucleotide sequence GT d. all above
Last Answer : all above
Description : The genetic code operates via (A) The protein moiety of DNA (B) The base sequences of DNA (C) The nucleotide sequence of mRNA (D) The base sequence of tRNA
Last Answer : Answer : C
Description : The genetic code operates through (A) The protein moiety of DNA (B) Cistrom of DNA (C) Nucleotide sequence of m RNA (D) The anticodons of tRNA
Description : The last step in synthesis of peptidoglycan is A- attachment of a peptide to muramic acid B- attaching two amino acids to form a cross-link C- attachment of a portion of peptidoglycan to a membrane lipid D- binding of penicillin to a membrane protein
Last Answer : attaching two amino acids to form a cross-link
Description : Degeneracy of the genetic code denotes the existence of (A) Base triplets that do not code for any amino acids (B) Codons consisting of only two bases (C) Codons that include one or more of the unusual bases (D) Multiple codons for a single amino acid
Last Answer : Answer : B
Description : Degeneracy of genetic code implies that (A) Codons do not code for specific amino acid (B) Multiple codons must decode the same amino acids (C) No anticodon on tRNA molecule (D) Specific codon decodes many amino acids
Description : Genetic code is (A) Collection of codon (B) Collection of amino acids (C) Collection of purine nucleotide (D) Collection of pyrimidine nucleotide
Last Answer : Answer : A
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 : How many different kinds of amino acids are specified by the genetic code? (a) 15 (b) 20 (c) 12 (d) 200
Last Answer : Ans:(b)
Description : .Because most of the amino acids are represented by more than one codon, the genetic code is(a) overlapping (b) wobbling (c) degenerate (d) generate.
Last Answer : a) overlapping
Description : .In the genetic dictionary, there are 64 codons as (a) 64 amino acids are to be coded (b) 64 types of tRNAs are present (c) there are 44 nonsense codons and 20 sense codons (d) genetic code is triplet.
Last Answer : (c) there are 44 nonsense codons and 20 sense codons
Description : In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids? (a) 20 (b) 64 (c) 61 (d) 60
Last Answer : b) 64
Description : Because most of the amino acids are represented by more than one codon, the genetic code is (a) overlapping (b) wobbling (c) degenerate (d) generate
Last Answer : (c) degenerate
Description : In the genetic dictionary, there are 64 codons as (a) 64 amino acids are to be coded (b) 64 types of tRNAs are present (c) there are 44 nonsense codons and 20 sense codons (d) genetic code is triplet
Last Answer : genetic code is triplet
Description : n the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids? (a) 20 (b) 64 (c) 61 (d) 60
Last Answer : c) 61
Description : Which of the following is the correct sequence of events in the origin of life? I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers IV. Formation of DNA-based genetic systems (a) I, II, III, IV (b) I, III, II, IV (c) II, III, I, IV (d) II, III, IV, I
Last Answer : c) II, III, I, IV
Description : Which statement about hormone types is correct? A) Non-steroid hormones activate an enzyme cascade. B) Steroid hormones regulate the production of a particular protein. C) Non-steroid hormones are ... all have four carbon rings with different side chains. E) All of the choices are correct.
Last Answer : E) All of the choices are correct.
Description : The primary structure of a protein refers to the sequence of amino acids that are linked together in a long chain. Which of the following common items would best represent the primary structure of a protein?
Last Answer : beads of different colors joined together on a piece of string
Description : Which of the following is the quaternary structure of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with ... (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone
Last Answer : description of the way the peptide chains are arranged with respect to each other
Description : The _______ structure of a protein is the sequence of amino acids. a. primary b. secondary c. tertiary d. quaternary
Last Answer : a. primary
Description : Agonists affect the receptor molecule in the following manner: A. Alter its amino acid sequence B. Denature the receptor protein C. Alter its folding or alignment of subunits D. Induce covalent bond formation
Last Answer : C. Alter its folding or alignment of subunits
Description : Which of the following statement(s) is/are true concerning translation of the mRNA message to protein synthesis? a. An adaptor molecule, tRNA, recognizes specific nucleic acid bases and unites them ... and the free amino acid occurs in the free cytoplasm d. Complete protein synthesis takes hours
Last Answer : Answer: a, b The synthesis of protein involves conversion from a four-letter nucleotide language to one of 20 chemically distinct amino acids. This process is referred to as ... translation and be moving down the mRNA molecules simultaneously, thus increasing the rate of protein synthesis
Description : If there are 999 bases in an RNA that code for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered? (a) 11 (b) 33 (c) 333 (d) 1
Last Answer : (d) 1
Last Answer : b) 33
Description : All of the following statements about nonsense codons are true except (A) They do not code for amino acids (B) They act as chain termination signals (C) They are identical in nuclear and mitochondrial DNA (D) They have no complementary anticodons
Description : What is sections of DNA that code for particular protein called?
Last Answer : Genes
Description : The α-amino group of the new amino acyl tRNA in the A site carries out a nucleophilic attack on the esterified carboxyl group of the peptidyl tRNA occupying the P site. This reaction is catalysed by (A) DNA polymerase (B) RNA polymerase (C) Peptidyl transferase (D) DNA ligase
Description : The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? - HN - CH - CO - NH - CH - CO - NH - CH - CO - ... -terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.
Last Answer : (a) D is the acidic amino acid-glutamic acid.
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 : How many amino acids are coded for by this sequence of nucleotides?
Description : What sequence of amino acids will correspond to this set of nucleotides AUGCCUACGUGGAC?
Last Answer : What is the answer ?
Description : The sequence of amino acids in human growth hormone and the synthesis were done by (A) Sanger (B) Krebs (C) Chah Holi (D) Molisch
Description : Amniocentesis is a method for : (1) determination of foetal health conditions (2) determination of the amino acids sequence (3) inducing abortion (4) artificial insemination
Last Answer : determination of foetal health conditions
Description : What is the change in DNA sequence that affects genetic information?
Last Answer : Mutation
Description : The restriction enzymes are used in genetic engineering, because (a) they can cut DNA at specific base sequence (b) they are nucleases that cut DNA at variable sites (c) they can degrade harmful proteins (d) they can join different DNA fragments.
Last Answer : (a) they can cut DNA at specific base sequence
Description : Identify the wrong statement with regard to restriction enzymes. (a) Each restriction enzyme functions by inspecting the length of a DNA sequence. (b) They cut the strand of DNA at palindromic sites. (c) They are useful in genetic engineering. (d) Sticky ends can be joined by using DNA ligases.
Last Answer : d) Sticky ends can be joined by using DNA ligases.
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 : The half-life of a protein depends upon its (A) Signal sequence (B) N-terminus amino acid (C) C-terminus amino acid (D) Prosthetic group
Description : What is lost from amino acids in the formation of a peptide bond? -Biology
Last Answer : answer:
Description : The amino acids required for creatine formation: (A) Glycine (B) Arginine (C) Methionine (D) All of these
Description : From two amino acids peptide bond formation involves removal of one molecule of (A) Water (B) Ammonia (C) Carbondioxide (D) Carboxylic acid
Description : Out of 64 codons, 61 codons code for 20 types of amino acid. It is called (a) degeneracy of genetic code (b) overlapping of gene (c) wobbling of codon (d) universility of codons.
Last Answer : (a) degeneracy of genetic code
Description : What protein must have its amino acids in correct order?
Last Answer : RNA is the most amino acids.
Description : The role of transfer RNS (IRNA) is to (a) Transfer mRNA from the nucleus to the cytoplasm (b) Carry amino acids from the cytoplasm to the nucleus (c) Carry the newly synthesised protein to its site of function in the cell (d) Transport amino acids to ribosomes
Last Answer : Ans:(d)
Description : Insertion of a base in a gene can cause (A) Change in reading frame (B) Garbled amino acid sequence in the encoded protein (C) Premature termination of translation (D) All of these
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