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 : Nonsense codons bring about (A) Amino acid activation (B) Initiation of protein synthesis (C) Termination of protein synthesis (D) Elongation of polypeptide chains
Last Answer : Answer : C
Description : ______ is used for making vinegar. (1) Tartaric acid (2) Malic acid (3) Oxalic acid (4) Acetic acid
Last Answer : (4) Acetic acid Explanation: Vinegar is a liquid consisting mainly of acetic acid (CH3COOH) and water.
Description : ____ is used for making vinegar. (1) Tartaric acid (2) Malic acid (3) Oxalic acid (4) Acetic acid
Last Answer : Acetic acid
Description : The primary structure of a protein refers to : (a) whether the protein is fibrous or globular (b) the amino acid sequence in the polypeptide chain (c) the orientation of the amino acid side chains in space (d) the presence or absence of an α-helix
Last Answer : the amino acid sequence in the polypeptide chain
Description : The number of polypeptide chains present in a molecule of haemoglobin is/are
Last Answer : The number of polypeptide chains present in a molecule of haemoglobin is/are A. 1 B. 3 C. 4 D. 2
Description : Each antibody molecule is made up of how many PAIR of polypeptide chains, joined together by disulfide bonds. a) 1 b) 2 c) 3 d) 4
Last Answer : ANSWER: B -- 2
Description : Name the acid present in lemon. (1) Phosphoric acid (2) Carbonic acid (3) Citric acid (4) Malic acid
Last Answer : (3) Citric acid Explanation: Lemons have significant concentrations of citric acid (about 47 g/l in juice). Citric acid occurs naturally in citrus fruits.
Description : Which acid is present in lemon – (1) malic acid (2) citric acid (3) lactic acid (4) tartaric acid
Last Answer : (2) citric acid Explanation: The main organic acids contained in the flesh of lemons are citric acid and malic acid. The sourness of citrus fruit is the taste of citric acid.
Description : The predominant organic acid present in grapes is. a. Tartaric acid b. Malic acid c. Citric acid d. None of these
Last Answer : a. Tartaric acid
Description : What is the chemical name of vinegar ? (1) Citric acid (2) Acetic acid (3) Pyruvic acid (4) Malic acid
Description : Assertion `:` Most of the human haemoglobin in our body has `2 alph` and `2 beta` polypeptide chains. Reason `:` Haemoglobin is a conjugate protein an
Last Answer : Assertion `:` Most of the human haemoglobin in our body has `2 alph` and `2 beta` polypeptide ... False. D. If both Assertion & Reason are false.
Description : The acid present in lemons and oranges is (a) acetic acid (b) hydrochloric acid (c) citric acid (d) oxalic acid
Last Answer : Ans:(c)
Description : The chemical name of vitamin C is (a) Citric acid (b) Ascorbic acid (c) Oxalic acid (d) Nitric acid
Last Answer : Ans:(b)
Description : Sour taste of lemon is due to the presence of which of the follow-ing? (1) Citric acid (2) Acetic acid (3) Oxalic acid (4) Formic acid
Last Answer : (1) Citric acid Explanation: Lemon juice is about 5% citric acid, which gives lemons a sour taste and a pH of 2 to 3. Citric acid is found in many fruits but lemon contains large quantity of ... of lemon juice makes it a key ingredient in drinks and foods such as lemonade and lemon meringue pie.
Description : The aqueous solution of which acids is called Vinegar - (1) Citric acid (2) Hydrochloric acid (3) Acetic acid (4) Oxalic acid
Last Answer : (3) Acetic acid Explanation: Vinegar is an aqueous solution of acetic acid and trace chemicals that may include flavorings. Vinegar typically contains 5–20% acetic acid by volume.
Description : An acid derived from green leaves of chickpea prescribed for intestinal disorders is (A) Citric acid (B) Sulphuric acid (C) Oxalic acid (D) Prussic acid
Last Answer : (C) Oxalic acid
Description : Acid present in Tomato is (A)Lactic acid (B) Tartaric acid (C) Oxalic acid (D) Citric acid
Description : Tomato is a natural source of which acid? a) Acetic acid b) Citric acid c) Tartaric acid d) Oxalic acid
Last Answer : d) Oxalic acid
Description : Sour taste of lemon is due to the presence of which of the following ? (1) Citric acid (2) Acetic acid (3) Oxalic acid (4) Formic acid
Last Answer : Citric acid
Description : Which of these acids is not organic in origin? (1) Lactic acid (2) Sulphuric acid (3) Citric acid (4) Oxalic acid
Last Answer : Sulphuric acid
Description : ‘Vinegar’ is a commercial name of (1) Oxalic acid (2) Hydrochloric acid (3) Acetic acid (4) Citric acid
Description : Insulin is made up of (A) A single polypeptide chain having 51 amino acid residues (B) A single polypeptide chain having 84 amino acid residues (C) A-chain having 21 and B-chain having 30 amino acid residues (D) A-chain having 30 and B-chain having 21 amino acid residues
Description : Human growth hormone has (A) One polypeptide chain and one intra-chain disulphide bond (B) One polypeptide chain and two intra-chain disulphide bond (C) Two polypeptide chains joined by one disulphide bond (D) Two polypeptide chains joined by two disulphide bond
Last Answer : Answer : B
Description : When egg albumin is heated till it is coagulated, the secondary and tertiary structures of the proteins are completely lost resulting in a mixture of randomly arranged (A) Dipeptide chains (B) Tripeptide chains (C) Polypeptide chains(D) All of these
Description : Isoenzymes for a given reaction (A) Have different spedificities (B) Have identical affinities for the same substrate (C) Exhibit different electrophoretic motilities (D) Contain similar ratios of different polypeptide chains
Description : The minimum number of polypeptide chains in an immunoglobulin is (A) Two (B) Four (C) Five (D) Six
Description : The following protein/polypeptide has a quaternary structure : (A) cc-Chymotrypsin (B) Hemoglobin (C) Insulin (D) Myoglobin
Last Answer : (B) Hemoglobin
Description : The hydrogen bonds between peptide linkages of a protein molecules are interfered by (A) Guanidine (B) Uric acid (C) Oxalic acid (D) Salicylic acid
Last Answer : Answer : A
Description : The chief constituent of vinegar is – (1) Formic acid (2) Acetic acid (3) Salycylic acid (4) Oxalic acid
Last Answer : (2) Acetic acid Explanation: Vinegar is a liquid substance consisting mainly of acetic acid (CH3CO2H) and water, the acetic acid being produced through the fermentation of ethanol by acetic acid ... easily available mild acid, it had a great variety of industrial, medical, and domestic uses.
Description : The chief constituent of vinegar is (1) Formic acid (2) Acetic acid (3) Salycylic acid (4) Oxalic acid
Description : A carrier molecule in the citric acid cycle is (A) Acetyl-CoA (B) Citrate (C) Oxaloacetate (D) Malate
Description : This pancreatic hormone increases the blood-sugar level: (A) Insulin (B) Glucagon (C) Pancreozymin (D) Pancreatic polypeptide
Description : The α-cells of pancreas islets produce (A) Insulin (B) Glucagon (C) Somatostatin (D) Pancreatic polypeptide
Description : β-cells of islet of langerhans of the pancreas secrete (A) Insulin (B) Glucagon (C) Somatostatin (D) Pancreatic polypeptide
Description : The end product of protein digestion in G.I.T. is (A) Dipeptide (B) Tripeptide (C) Polypeptide (D) Amino acid
Last Answer : Answer : D
Description : The ratio that approximates the number of net molecule of ATP formed per mole of Glucose oxidized in presence of O2 to the net number formed in abscence of O2 is (A) 4 : 1 (B) 10 : 2 (C) 12 : 1 (D) 18 : 1
Last Answer : B
Description : The following are true about the sodium channels: a. they are made up of polypeptide chains b. have the highest densities at the nodes of Ranvier c. open in response to depolarization d. remain open as long as depolarization is maintained
Last Answer : have the highest densities at the nodes of Ranvier
Description : Consider the following statements: 1. Caffeine, a constituent of tea and coffee is a diuretic 2. Citric acid is used in soft drinks. 3. Ascorbic acid is essential for the formation of bones and teeth. 4. Citric Acid is a good ... 2 only (b) 1, 2 and 3 only (c) 3 and 4 only (d) 1, 2, 3 and 4
Last Answer : Ans:(a)
Description : Which one of the following is not likely to be a constituent of vegetable oils? (A) Citric acid (B) Oleic acid (C) Stearic acid (D) Glycerol
Last Answer : (A) Citric acid
Description : All the following statements about epidermal growth factor are true except (A) It is a protein (B) It possess quaternary structure (C) Its receptor is made up of a single polypeptide chain (D) Its receptor possesses tyrosine kinase domain
Description : In the B chain of insulin molecule, the C-terminal amino acid: (A) Threonine (B) Tyrosine (C) Glutamate (D) Valine
Description : In the B chain of insulin molecule, the Nterminal amino acid is (A) Proline (B) Threonine (C) Phenylalanine (D) Lysine
Description : In the A chain of insulin molecule the Cterminal amino acid is (A) Asparagine (B) Threonine (C) Valine (D) Tyrosine
Description : In A chain of the insulin molecule the Nterminal amino acid is (A) Glycine (B) Valine (C) Serine (D) Phenylalanine
Description : Malic enzyme convers malic acid, in the presence of NADP+ to Pyruvic acid. This reaction is a/an (A) Decarboxylation (B) Decarboxylation and Dehydrogenation (C) Dehydrogenation (D) Oxidation
Description : A biochemical indication of vitamin B12 deficiency can be obtained by measuring the urinary excretion of (A) Pyruvic acid (B) Malic acid (C) Methyl malonic acid (D) Urocanic acid
Description : Tricarboxylic acid cycle to be continuous requires the regeneration of (A) Pyruvic acid (B) oxaloacetic acid (C) α-oxoglutaric acid (D) Malic acid
Description : The portion of the immunoglobulin molecule that binds the specific antigen is formed by (A) Variable regions of H and L chains (B) Constant region of H chain (C) Constant region of L chain (D) Hinge region