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 : What is lost from amino acids in the formation of a peptide bond? -Biology
Last Answer : answer:
Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group
Last Answer : Answer : A
Description : Ninhydrin with evolution of CO2 forms a blue complex with (A) Peptide bond (B) α-Amino acids (C) Serotonin (D) Histamine
Last Answer : Answer : B
Description : What two elements are connected in a peptide bond of 2 amino acids? -Biology
Description : What is the peptide bond that connects amino acids in proteins? -Biology
Description : Chymotrypsin is specific for peptide bonds containing (A) Uncharged amino acid residues (B) Acidic amino acids (C) Basic amino acid (D) Small amino acid residues
Description : The enzyme trypsin is specific for peptide bonds of (A) Basic amino acids (B) Acidic amino acids (C) Aromatic amino acids (D) Next to small amino acid residues
Description : Protein is a polymer of (A) Sugars (B) Phenols (C) Amino acids (D) Carboxylic acids
Last Answer : Answer : C
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 : With regard to insulin: a. it is a 51 amino acid peptide b. it is formed by removal of C-chain from proinsulin c. it is produced by the alpha cells of the pancreas d. it alters the rate of enzyme synthesis
Last Answer : it alters the rate of enzyme synthesis
Description : Whcih of the following hormone is a peptide of less than ten amino acids? (A) Insulin (B) Growth hormone (C) Oxytocin (D) Parathyroid hormone 228 MCQs IN BIOCHEMISTRY
Description : All the following statements about proopiomelanocortin are true except (A) It is made up of 285 amino acids (B) It is synthesised in pars intermedia and anterior lobe of pituitary gland ... ) It is the precursor of corticotropin like intermediate lobe peptide and endorphins 218 MCQs IN BIOCHEMISTRY
Description : The number of amino acids in the peptide hormone calcitonin is (A) 16 (B) 24 (C) 32 (D) 40
Description : The only correct statement about chymotrypsin is (A) It is formed from trypsin (B) Carboxypeptidase converts trypsin into chymotrypsin (C) Its optimum pH is around 7 (D) It hydrolyses peptide bonds involving basic amino acids
Description : Assertion `:` Pancreatic amylase digest protein to amino acid. Reason `:` Pancreatic amylase breaks the peptide bond of protein.
Last Answer : Assertion `:` Pancreatic amylase digest protein to amino acid. Reason `:` Pancreatic amylase breaks the ... D. If both Assertion & Reason are false.
Description : The covalent bond that is repeatedly present between different amino acid residues in a protein is called (a) p-bond (b) hydrogen bond (c) peptide bond (d) metallic bond
Last Answer : Ans:(c)
Description : Glycine is a unique amino acid because it (a) has no chiral carbon (b) has a sulfur containing R group (c) cannot form a peptide bond (d) is an essential amino acid
Last Answer : has no chiral carbon
Description : The unwanted amino acids abstracted from the tissues are either used up by the tissue or in the liver converted into (A) Ammonia (B) Urea (C) Ammonium salts (D) Uric acid
Description : Most of the ammonia released from L-αamino acids reflects the coupled action of transaminase and (A) L-glutamate dehydrogenase (B) L-amino acid oxidase (C) Histidase (D) Serine dehydratase
Description : From dietary protein as well as from the urea present in fluids secreted into the gastrointestinal tract intestinal bacteria produce (A) Carbondioxide (B) Ammonia (C) Ammonium sulphate (D) Creatine
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 : A chain of amino acids joined by peptide bonds is called as (a) Peptide chain (b) Polypeptide chain (c) Polyamino acid chain (d) Nucleotide chain
Last Answer : Ans. ((b))
Description : The formation of a peptide bond during the elongation step of protein synthesis results in the splitting of how many high energy bonds? (A) 1 (B) 2 (C) 3 (D) 4
Description : After formation of a peptide bond, mRNA is translocated along the ribosome by (A) eEF-1 and GTP (B) eEF-2 and GTP (C) Peptidyl transferase and GTP (D) Peptidyl transferase and ATP
Description : Glycoproteins are marked for destruction by removal of their (A) Oligosaccharide prosthetic group (B) Sialic acid residues (C) Mannose residues (D) N-terminal amino acids
Last Answer : Answer : D
Description : Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3
Last Answer : cleavage of peptide linkages
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 : If the amino group and a carboxylic group of the amino acid are attached to same carbon atom, the amino acid is called as (A) Alpha (B) Beta (C) Gamma (D) Epsilon
Description : If the amino group and a carboxylic group of the amino acid are attached to same carbon atom, the amino acid is called (A) Alpha (B) Beta (C) Gamma (D) Delta
Description : Amino acid with side chain containing basic groups is (A) 2-Amino 5-guanidovaleric acid (B) 2-Pyrrolidine carboxylic acid (C) 2-Amino 3-mercaptopropanoic acid (D) 2-Amino propanoic acid
Last Answer : (A) 2-Amino 5-guanidovaleric acid
Description : Assertion `:` Removal of gall bladder does affect the protein digestion. Reason `:` Bile juice break the peptide bond.
Last Answer : Assertion `:` Removal of gall bladder does affect the protein digestion. Reason `:` Bile juice break ... . D. If both Assertion & Reason are false.
Description : In brain, the major metabolism for removal of ammonia is the formation of (A) Glutamate (B) Aspartate (C) Asparagine (D) Glutamine
Description : The amino acids abstracted from the liver are not utilized for repair or special synthesis but are broken down to (A) Keto acids (B) Sulphur dioxide (C) Water (D) Ammonia
Description : What organelles form peptide bonds between amino acids?
Last Answer : Ribosomes. They are constructed from protein themselves, but, more germane to the question, they are also partially composed of catalytic RNA, which forges the peptide bonds.
Description : Enzymes contain 1. Peptide bonds 2. Amino acids 3. Halogens 4. Fatty acids The correct answers are: (a) 1 and 4 (b) 1,3 and 4 (c) 1 and 2 (d) 2, 3 and 4
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 : Which of the following is the first step in the determination of the primary structure of proteins? (a) determining the number and kind of amino acids in the peptide (b) reducing the disulfide bridges ... (c) protecting the N-terminal of the peptide (d) protecting the C-terminal of the peptide
Last Answer : reducing the disulfide bridges in the protein
Description : Which statement is NOT true about non-steroid (peptide) hormones? A) They are derived from peptides, proteins, polypeptides, and derivatives of amino acids. B) They bind to receptors on the cell surface. ... They create an enzyme cascade effect. E) They enter the cell in order to have an effect.
Last Answer : E) They enter the cell in order to have an effect.
Description : The third active process for amino acids transport involves (A) Acidic amino acids (B) Basic amino acids (C) Neutral amino acids (D) Sulphur containing amino acids
Description : A growing peptide in a ribosome can not be shifted to the adjacent ribosome because (A) It is firmly attached (B) It will get the amino acid cleaved (C) The gap between the ribosomes is too big for a shift (D) The adjacent ribosomes have different composition
Description : Edman’s reaction can be used to (A) Determine the number of tyrosine residues in a protein (B) Determine the number of aromatic amino acid residues in a protein (C) Determine the amino acid sequence of a protein (D) Hydrolyse the peptide bonds in a protein
Description : Hormonal activity of ACTH is completely lost on removal of (A) 5 C-terminal amino acids (B) 10 C-terminal amino acids (C) 15 C-terminal amino acids (D) None of these
Description : Complete hydrolysis of proteins produces : (a) Ammonia and carbon dioxide (b) Urea and uric acid (c) A mixture of amino acids (d) Glycogen and a fatty acid
Last Answer : A mixture of amino acids
Description : In very first stage of decomposition of the organic matter in sewage A. Nitrites are formed B. Nitrates are formed C. Carbondioxide is formed D. Ammonia is formed
Last Answer : ANS: D
Description : The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide
Last Answer : ANS: B
Description : Which antibiotic inhibits peptide bond formation
Last Answer : Which antibiotic inhibits peptide bond formation A. Streptomycin B. Tetracycline C. Chloramphenicol D. Neomycin