Description : Protein part of enzyme is know as (1) Isoenzyme (2) Holoenzyme (3) Apoenzyme (4) All the above
Last Answer : Apoenzyme
Description : An organic substance bound to an enzyme and essential for the activity of enzyme is called (A) Holoenzyme (B) Apoenzyme (C) Coenzyme (D) Isoenzyme
Last Answer : Answer : C
Description : Protein portion of an enzyme when it is combined with organic molecule is termed as A- apoenzyme B- co-enzyme C- holoenzyme D- co-factors
Last Answer : apoenzyme
Description : Combination of apoenzyme and coenzyme produces (A) Prosthetic group (B) Holoenzyme (C) Enzyme substrate complex (D) Enzyme product complex
Last Answer : Answer : B
Description : The active form of enzyme is A- apoenzyme B- coenzyme C- holoenzyme D- none of these
Last Answer : holoenzyme
Description : difference between apoenzyme and holoenzyme -Biology
Last Answer : answer:
Description : Which of the following statements is correct with reference to enzymes? (a) Holoenzyme = Apoenzyme + Coenzyme (b) Coenzyme = Apoenzyme + Holoenzyme (c) Holoenzyme = Coenzyme + Co-factor (d) Apoenzyme = Holoenzyme + Coenzyme
Last Answer : a) Holoenzyme = Apoenzyme + Coenzyme
Description : Which one of the following statements is correct , with reference to enzymes ? (1) Holoenzyme = Apoenzyme + Coenzyme (2) Coenzyme = Apoenzyme + Holoenzyme (3) Holoenzyme = Coenzyme + Co-factor (4) Apoenzyme = Holoenzyme + Coenzyme
Last Answer : (1) Holoenzyme = Apoenzyme + Coenzyme
Description : Consider the following statements. (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the ... ) (A) is true but (B) is false. (d) Both (A) and (B) are false
Last Answer : (d) Both (A) and (B) are false.
Description : Part of enzyme which combines with nonprotein part to form functional enzyme is (A) Apoenzyme (B) Coenzyme (C) Prosthetic group (D) None of these
Description : Cofactor (Prosthetic group) is a part of holoenzyme, it is (A) Inorganic part loosely attached (B) Accessory non-protein substance attached firmly (C) Organic part attached loosely (D) None of these
Description : Co-factor (prosthetic group) is a part of holoenzyme. It is (a) loosely attached organic part (b) loosely attached inorganic part (c) accessory non-protein substance attached firmly (d) none of these.
Last Answer : (c) accessory non-protein substance attached firmly
Description : The term ‘humulin’ is used for (a) hydrolytic enzyme (b) powerful antibiotic (c) human insulin (d) isoenzyme.
Last Answer : (c) human insulin
Description : Ribonucleotides of RNA primer are replaced by deoxyribonucleotides by the enzyme: (A) DNA polymerase I (B) DNA polymerase II (C) DNA polymerase III holoenzyme (D) All of these
Last Answer : Answer : A
Description : A Holoenzyme is (A) Functional unit (B) Apo enzyme (C) Coenzyme (D) All of these
Last Answer : Answer : D
Description : Lactose or its analogues act as positive regulators of lac operon by (A) Attaching to i gene and preventing its expression (B) Increasing the synthesis of catabolite gene activator protein (C) ... holoenzyme (D) Binding to repressor subunits so that the repressor cannot attach to the operator locus
Description : Binding of RNA polymerase holoenzyme to the promoter region of lac operon is facilitated by (A) Catabolite gene activator protein (CAP) (B) cAMP (C) CAP-cAMP complex (D) None of these
Description : Difference between apoenzyme and coenzyme -Biology
Description : Creatine phosphokinase isoenzyme is a marker for (A) Kidney disease (B) Liver disease (C) Myocardial infarction (D) None of these
Description : The abnormal isoenzyme need not (A) Be an oxidoreductase (B) Have any coenzyme (C) Require ATP (D) Be localized intracellularly (E) Be a catalyst
Description : Liver and skeletol measle disorders are characterized by on disk proportionate increase in which of the LDH isoenzyme fraction? (A) LDH-1 (B) LDH-1 and LDH-2 (C) LDH-3 and LDH-4 (D) LDH-2 and LDH-3 (E) LDH-5
Description : Which of the following is not having an apoenzyme and coenzyme? (A) Lactate dehydrogenase (B) Succinate dehydrogenase (C) Malate dehydrogenase (D) Pepsin
Description : Which of the following isoenzyme of lactate dehydrogenase is raised in serum in myocardial infarction: (A) LD1 (B) LD2 (C) LD1 and LD2 (D) LD5
Description : Apoenzyme + Prosthetic group
Last Answer : Ans. Holoenzyme
Description : The distinctive feature of the isoenzyme cyclooxygenase-2 is (a) It is not inhibited by indomethacin (b) It is inducible (c) It generates cytoprotective prostagladins in gastric mucosa (d) It is found only in foetal tissues
Last Answer : Ans: B
Description : Select the antibiotic which inhibits drug metabolizing isoenzyme CYP3A4 resulting in potentially fatal drug interaction with terfenadine: A. Erythromycin B. Clindamycin C. Gentamicin D. Vancomycin
Last Answer : A. Erythromycin
Description : The following is not true of the cytochrome P450 isoenzyme CYP2D6: A. It generates the hepatotoxic metabolite N-acetyl benzoquinone immine from paracetamol B. It is involved in demethylation of ... for poor capacity to hydroxylate many drugs including metoprolol D. It is inhibited by quinidine
Last Answer : A. It generates the hepatotoxic metabolite N-acetyl benzoquinone immine from paracetamol
Description : The isoenzyme cyclooxygenase-2 (COX-2) is expressed constitutively at the following site: A. Gastric mucosa B. Neutrophils C. Blood platelets D. Juxtaglomerular apparatus
Last Answer : D. Juxtaglomerular apparatus
Description : The distinctive feature of the isoenzyme cyclooxygenase-2 is: A. It is not inhibited by indomethacin B. It is inducible C. It generates cytoprotective prostagladins in gastric mucosa D. It is found only in foetal tissues
Last Answer : B. It is inducible
Description : Select the antihistaminic which blocks cardiac K+ channels when given in high doses or along with drugs that inhibit CYP3A4 isoenzyme: A. Chlorpheniramine B. Promethazine C. Astemizole D. Loratadine
Last Answer : C. Astemizole
Last Answer : A. It generates the hepatotoxic metabolite N-acetyl benzoquinone immine from paracetamo
Description : What is a holoenzyme? -Biology
Last Answer : Holoenzymes are the active forms of enzymes. Enzymes that require a cofactor but are not bound by one are called apoenzymes. Holoenzymes represent the apoenzyme bound to its necessary cofactors or prosthetic groups.
Description : RNA polymerase holoenzyme binds to lac operon at the following site: (A) i gene (B) z gene (C) Operator locus (D) Promoter region
Description : DNA polymerase III holoenzyme possesses (A) Polymerase activity (B) 3’→5’ Exonuclease activity (C) 5’→3’ Exonuclease and polymerase activities (D) 3’→5’ Exonuclease and polymerase activities
Description : Negative supercoils are introduced in DNA by (A) Helicase (B) DNA ligase (C) DNA gyrase (D) DNA polymerase III holoenzyme
Description : Deoxyribonucleotides are added to RNA primer by (A) DNA polymerase I (B) DNA polymerase II (C) DNA polymerase III holoenzyme (D) All of these
Description : During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called? (a) AAAT box (b) TATA box (c) GGTT box (d) CAAT box
Last Answer : (c) GGTT box
Last Answer : (b) TATA box
Description : The transcription initiation factor associated with the RNA polymerase holoenzyme in prokaryotes is (a) β (b) ω (c) σ (d) αI
Last Answer : c) σ (
Description : Which enzyme take part in digestion of milk protein?
Last Answer : Rennin
Description : Non protein part of enzyme is called (a) Iso-enzyme (b) Holo-enzyme (c) Apo-enzyme (d)Prosthatic group
Last Answer : (d)Prosthatic group
Description : (a) What is the role of HCl in our stomach ? (b) What is emulsification of fats ? (c) Which protein digesting enzyme is present in pancreatic juice ? -Biology
Last Answer : (a)(i) It sterilises food by killing pathogens and other microbes. (ii) It has a pH of 2, which is perfect for entyaus such as pepsin to break down proteins as effectively as possible. ( ... as emulsification. (c) Trypsin is the enzyme secreted by the pancreas which aids in digestion of proteins.
Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides
Description : The enzyme amino acyl tRNA synthetase is involved in (A) Dissociation of discharged tRNA from 80S ribosome (B) Charging of tRNA with specific amino acids (C) Termination of protein synthesis (D) Nucleophilic attack on esterified carboxyl group of peptidyl tRNA
Description : An enzyme is a (A) Carbohydrate (B) Lipid (C) Protein (D) Nucleic acid ENZYMES 171
Description : Ribozymes: (A) RNA enzyme (B) Non-protein enzymes (C) Catalyst function (D) All of these
Description : Covalent modification of an enzyme generally requires a (A) Hormone (B) cAMP (C) Protein kinase (D) All of these
Description : The protein, which is in fact a multifunctional enzyme complex in higher organism is (A) Acetyl transacylase (B) Malonyl transacylase (C) 3-Hydroxy acyl-ACP dehyratase (D) Fatty acid synthase
Description : In biotin-containing enzymes, the biotin is bound to the enzyme by (A) An amide linkage to carboxyl group of glutamine (B) A covalent bond with CO2 (C) An amide linkage to an amino group of lysine (D) An amide linkage to α-carboxyl group of protein