Description : Which one of the following statements is not characteristic of allosteric enzymes? (A) They frequently catalyze a committed step early in a metabolic pathway (B) They are often composed of subunits (C) They follow Michaelis-Menten kinetics (D) They frequently show cooperativity for substrate binding
Last Answer : Answer : C
Description : Hemoglobin is a molecule made of four polypeptide chains, each bound to a iron-containing molecular group called a heme group. So the molecule contains four polypeptide chains and four ... depends upon the integrity of its quaternary structure. Blood Questions - Image Diversity: hemoglobin molecule
Last Answer : On average what is the life duration of the red blood cells?
Description : Which of the following statements is wrong for viroids? (a) They cause infections. (b) Their RNA is of high molecular weight. (c) They lack a protein coat. (d) They are smaller than viruses
Last Answer : (b) Their RNA is of high molecular weight.
Description : High acid value of an oil or fat is an indication of (A) Storage under improper conditions (B) Absence of unsaturation (C) Its smaller molecular weight (D) None of these
Last Answer : (A) Storage under improper conditions
Description : What are the subunits of prokaryotic ribosomes? -Biology
Last Answer : answer:
Description : What is elasticity in polymers generally related to amount of hydrogen bonding between different subunits number of subunits in the polymer chain its greater tensile strength the synthetic composure?
Last Answer : amount of hydrogen bonding between different subunitsnumber of subunits in the polymer chainits greater tensile strengththe synthetic composure
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
Last Answer : Answer : D
Description : Peptidyl transferase activity of 50 S ribosomal subunits is inhibited by (A) Rifampicin (B) Cycloheximide (C) Chloramphenicol (D) Erythromycin
Description : Tetracyclines inhibit binding of amino acyl tRNAs to (A) 30 S ribosomal subunits (B) 40 S ribosomal subunits (C) 50 S ribosomal subunits (D) 60 S ribosomal subunits
Last Answer : Answer : A
Description : Ribozymes are (A) Enzymes present in ribosomes (B) Enzymes which combine the ribosomal subunits (C) Enzymes which dissociate (D) Enzymes made up of RNA
Description : In prokaryotes, the ribosomal subunits are (A) 30 S and 40 S (B) 40 S and 50 S (C) 30 S and 50 S (D) 40 S and 60 S
Description : In the insulin receptor, tyrosine kinase domain is present in (A) α-Subunits (B) β-Subunits (C) γ-Subunits (D) δ-Subunits
Last Answer : Answer : B
Description : β-Subunits of insulin receptor are present (A) Outside the cell membrane (B) In the cell membrane (C) Across the cell membrane (D) In the cytosol
Description : α-Subunits of insulin receptor are present (A) Outside the cell membrane (B) In the cell membrane (C) Across the cell membrane (D) In the cytosol
Description : Insulin binding sites are present on the (A) α-subunits of insulin receptor (B) β-subunits of insulin receptor (C) γ-subunits of insulin receptor (D) α-and β−subunits of insulin receptor
Description : All the following statements about TSH are true except (A) It is a glycoprotein (B) It is made up of α- and β-subunits (C) Receptor recognition involves both the subunits (D) Its subunit is identical with those of FSH and LH
Description : Thyroid stimulating hormone is a dimer. The α-subunits of TSH, LH, FSH are identical. Thus the biological specificity must therefore be β subunit in which the number of amino acids is (A) 78 (B) 112 (C) 130 (D) 199
Description : Apoferritin molecule is made up of (A) Four subunits (B) Eight subunits (C) Ten subunits (D) Twenty-four subunits
Description : Allosteric enzymes contain (A) Multiple subunits (B) Single chain (C) Two chains (D) Three chains
Description : The shape of an enzyme and consequently its activity can be reversibly altered from moment to moment by (A) Heat (B) Amino acid substrate (C) Allosteric subunits (D) Sulfur substitutions
Description : Cyclic AMP binds to (A) Catalytic subunits of protein kinase (B) Regulatory subunits of protein kinase (C) Catalytic subunits of phosphorylase kinase (D) Regulatory subunits of phosphorylase kinase
Description : A molecule of phosphorylase kinase is made up of (A) 4 subunits (B) 8 subunits (C) 12 subunits (D) 16 subunits
Description : In quaternary structure, subunits are linked by (A) Peptide bonds (B) Disulphide bonds (C) Covalent bonds (D) Non-covalent bonds
Description : Lactate dehydrogenase has how many polypeptide subunits?
Last Answer : Four. It is a tetramer.
Description : .Polysome is formed by (a) a ribosome with several subunits (b) ribosomes attached to each other in a linear arrangement (c) several ribosomes attached to a single mRNA (d) many ribosomes attached to a strand of endoplasmic reticulum.
Last Answer : (c) several ribosomes attached to a single mRNA
Description : Polysome is formed by (a) a ribosome with several subunits (b) ribosomes attached to each other in a linear arrangement (c) several ribosomes attached to a single mRNA (d) many ribosomes attached to a strand of endoplasmic reticulum.
Description : Which of the following statements about nerve growth factor is not true a. it is made up of 3 polypeptide subunits b. it is found in high concentration in the submaxillary salivery gland c. it is picked up by nerves from the organs they innervate d. it is present in brain
Last Answer : it is found in high concentration in the submaxillary salivery gland
Description : The haemoglobin of a human fetus (a) has only 2 protein subunits instead of 4 (b) has a higher affinity for oxygen than that of an adult (c) has a lower affinity for oxygen than that of the adult (d) its affinity for oxygen is the same as that of an adult.
Last Answer : (b) has a higher affinity for oxygen than that of an adult
Description : What is the advantage of a recombinant subunit vaccine? a. it can't cause disease b. adverse reactions are rare because only the important subunits of the antigen are included c. the vaccine is not made from blood fragments d. A-C are correct
Last Answer : d. A-C are correct
Description : An attenuated vaccine contains a. Inactive toxins. b. Living, but slow growing (replicating) antigens. c. Killed bacteria. d. Noninfective antigen subunits.
Last Answer : b. Living, but slow growing (replicating) antigens.
Description : What are the Svedberg values for the subunits of the 70S ribosomes of E. colli? A- 40S and 30S B- 50S and 20S C- 50S and 30S D- .40S and 20S
Last Answer : 50S and 30S
Description : A block of related subject matter with several subunits and topics. (a) Rule (b) Unit (c) Concept (d) Fact
Last Answer : (b) Unit
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 : What are the names given to the basic subunits of a nucleic acid.
Last Answer : ANSWER: MONONUCLEOTIDES or NUCLEOTIDES
Description : Write the molecular formulae for the following compounds -Maths 9th
Last Answer : NEED ANSWER
Last Answer : molecular formulae of the following compounds.
Description : What is the difference in the molecular formula of any two consecutive members of a homologous series of organic compounds? -Chemistry
Last Answer : —CH2— is the difference in the molecular formula of any two consecutive members of a homologous series of organic compounds.
Description : Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is `C_(8)H_(8)O`. Q undergoes cannizzaro reactions b
Last Answer : Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is `C_(8) ... R , respectively is (are) A. B. C. D.
Description : Are covalent molecular compounds ductile?
Last Answer : What is the answer ?
Description : Is Ba(SCN)2(S) ionic or molecular compounds?
Last Answer : Need answer
Description : How compared with the melting points of ionic compounds the melting points of molecular solids tend to be?
Last Answer : Ionic compounds have a higher melting point.
Description : What statement about Arrhenius acids is FALSETheir aqueous solutions are electrolytesTheir water solutions are called aqueous acids They increase the concentration of hydroxide ions in aqueous solutionThey are molecular compounds with hydrogen ions?
Last Answer : The answer is: They increase the concentration of hydroxide ions in aqueous solution.
Description : Compounds with identical molecular formula but different structures are called - (1) Tetravalent compounds (2) Structural isomers (3) Covalent compounds (4) None of the above
Last Answer : (2) Structural isomers Explanation: Structures with identical molecular formula but different structures are called structural isomers. Eg: Butane.
Description : Asphalts are (A) Low molecular weight & low boiling point compounds present in petroleum (B) Desirable in catalytic cracking feedstock, because they produce coke (C) Readily oxidisable and form carbonaceous sludge (D) All (A), (B) & (C)
Last Answer : (C) Readily oxidisable and form carbonaceous sludge
Description : Compounds with same molecular for- mula but different structures are known as?
Last Answer : Isomers Eg: Glucose
Description : Organic compounds having same molecular formula with different structural arrangement of atoms in them is known as
Last Answer : isomerism.
Description : The general formula of a homologous series of carbon compounds is C n H 2n . Write the molecular formula of the second and fourth member of the series.
Last Answer : Second member is n=3, C 3 H 2x3 = C 3 H 6 Fourth member is n=5, C 5 H 2x5 = C 5 H 10
Description : Write the molecular formulae of the third and fifth member of homologous series of carbon compounds represented by the general formula C n H 2n+2
Last Answer : Third member n = 3, C 3 H 2x3+2 = C 3 H 8 Fifth member n = 5, C 5 H 2x5+2 = C 5 H 12
Description : What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
Last Answer : Isomers