Description : The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed
Last Answer : Answer : A
Description : What are Oxo-Acids?give ex .
Last Answer : Oxo-acids are those in which the acidic proton is on a hydroxyl group with an oxo group attached to the same atom e.g., carbonic acid, H2CO3 (OC(OH)2; sulphuric acid, H2SO4 (O2S(OH)2).
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
Last Answer : Ans:(c)
Description : Which of the following statements is not true about fatty acids? (a) Fatty acids are carboxylic acids with long hydrocarbon side chains. (b) The double bonds in unsaturated fatty acids are always ... contain even numbers of carbons and are unbranched. (d) Fatty acids can be saturated or unsaturated
Last Answer : The double bonds in unsaturated fatty acids are always conjugated
Description : Which of the following xenon-OXO compounds may not be obtained by hydrolysis of xenon fluorides?
Last Answer : Which of the following xenon-OXO compounds may not be obtained by hydrolysis of xenon fluorides? A. (1) `XeO_2F_2` ... C. (3) `XeO_3` D. (4) `XeO_4 `
Description : Which has maximum number of oxo groups ?
Last Answer : Which has maximum number of oxo groups ? A. `H_(2)SO_(4)` B. `H_(2)SO_(3)` C. `H_(3)PO_(3)` D. `H_(3)PO_(4)`
Description : Oxo process is related to?
Last Answer : Alcohol
Description : The immediate precursor for glumatic acid production by Corynebacterium glutamicumis A.lysine B.oxoacetate C.citrate D.2-oxo-glutarate
Last Answer : D.2-oxo-glutarate
Last Answer : .2-oxo-glutarate
Description : The active site of an enzyme is formed by a few of the enzymes: (A) R groups of the amino acids (B) Amino groups of the amino acids (C) Carboxyl group of the amino acids (D) Exposed sulfur bonds
Last Answer : Answer : C
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 : 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 : Tertiary structure of a protein describes (A) The order of amino acids (B) Location of disulphide bonds (C) Loop regions of proteins (D) The ways of protein folding
Last Answer : Answer : D
Description : Hydrophobic bonds are formed in protein be- tween which amino acids?
Last Answer : Valine, leucine and isoleucine residues.
Description : The number of S-S bonds in sulphur trioxide trimer `(S_(3)O_(9))` is
Last Answer : The number of S-S bonds in sulphur trioxide trimer `(S_(3)O_(9))` is A. three B. two C. one D. zero
Description : The number of S-S bonds in sulphur trioxide trimer `(gamma-form)` is:
Last Answer : The number of S-S bonds in sulphur trioxide trimer `(gamma-form)` is: A. three B. two C. zero D. one
Last Answer : The number of S-S bonds in sulphur trioxide trimer `(S_(3)O_(9))` is A. Three B. Two C. One D. Zero
Description : Number of `S-O-S` bonds and hybridisation of sulphur in `gamma`-form of sulphur trioxide?
Last Answer : Number of `S-O-S` bonds and hybridisation of sulphur in `gamma`-form of sulphur trioxide? A. `3,sp^(2)` B. `2,sp^(2)` C. `3,sp^(3)` D. `0,sp^(3)`
Description : The side chain of which of the following amino acid contain sulphur atom? (A) Methionine (B) Threonine (C) Leucine (D) Tryptophan
Description : Sulphur is made available to the body by the amino acids: (A) Cystine and methionine (B) Taurine and alanine (C) Proline and hydroxyproline (D) Arginine and lysine MINERAL METABOLISM 191
Description : Xanthoproteic test is positive in proteins containing (A) Sulphur amino acids (B) α-Amino acids (C) Aromatic amino acids (D) Aliphatic amino acids
Description : Sulphur containing amino acids after catabolism produces a substance which is excreted: (A) SO2 (B) HNO3 (C) H2SO4 (D) H3PO4
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 : 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 : Maple syrup urine diseases is an inborn error of metabolism of (A) Sulphur-containing amino acids (B) Aromatic amino acids (C) Branched chain amino acids (D) Dicarboxylic amino acids
Description : All the following are sulphur containing amino acids found in proteins except (A) Cysteine (B) Cystine (C) Methionine (D) Threonine
Last Answer : (D) Threonine
Description : In fatty acids synthase of both bacteria and mammals, ACP (acyl carrier protein) contain the vitamin: (A) Thiamin (B) Pyridoxine (C) Riboflavin (D) Pantothenic acid
Description : Side chains of all following amino acids contain aromatic rings except (A) Phenyl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
Last Answer : Answer : B
Description : Side chains of all amino acids contain aromatic rings except (A) Pheynl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
Description : The true statement about solutions of amino acids at physiological pH is (A) All amino acids contain both positive and negative charges (B) All amino acids contain positively charged side chains ... amino acids contain only positive charge (D) All amino acids contain negatively charged side chains
Description : Proteins contain (A) Only L- α - amino acids (B) Only D-amino acids (C) DL-Amino acids (D) Both (A) and (B)
Description : All proteins contain the (A) Same 20 amino acids (B) Different amino acids (C) 300 Amino acids occurring in nature (D) Only a few amino acids
Description : Nucleic acids are unique among the biopolymers in that they contain phosphate. How has this property been exploited experimentally in studies of protein synthesis?
Last Answer : The use of 32P (radioactive) to label DNA and RNA for Southern and northern blotting was a major technical advance. One of the earliest exploitations of the unique phosphorus content of nucleic ... machinery to direct the synthesis of many copies of the virus, eventually leading to host cell.
Description : The true statement about solutions of amino acids at physiological pH is (A) All amino acids contain both positive and negative charges (B) All amino acids contain positively charged side chains ... amino acids contain only positive Charge (D) All amino acids contain negatively charged side chains
Last Answer : (A) All amino acids contain both positive and negative charges
Description : Proteins contain (A) Only L- - amino acids (B) Only D-amino acids (C) DL-Amino acids (D) Both (A) and (B)
Last Answer : (A) Only L- - amino acids
Last Answer : (A) Same 20 amino acids
Description : Oxygen is always divalent while sulphur can form 2, 4 and 6 bonds because
Last Answer : Oxygen is always divalent while sulphur can form 2, 4 and 6 bonds because A. High ... Vacant d-orbitals in the valency shell of Sulphur
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 : 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 : What happens at the ribosome in the production of a protein? a. mRNA brings the codon b. tRNA brings the anticodon c. the amino acids are linked by polypeptide bonds d. translation e. all the above
Last Answer : c. the amino acids are linked by polypeptide bonds
Description : What is the weak bond holding the nucleic acids together in DNA? a. ionic bonds b. covalent bonds bonds c. polar bond d. hydrogen bond
Last Answer : d. hydrogen bond
Description : Peptide bonds are found in: a) carbohydrates b) lipids c) nucleic acids d) proteins
Last Answer : ANSWER: D -- PROTEINS
Description : Which of the following petroleum products contain minimum sulphur? (A) Naphtha (B) Kerosene (C) LSHS (D) Furnace oil
Last Answer : (A) Naphtha
Description : A good metallurgical coke (A) Should have high porosity (B) Should be brittle (C) Must contain moderate quantities of ash, moisture, sulphur and volatile matters (D) Should have low fusion point of its ash
Last Answer : (A) Should have high porosity
Description : Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils (A) Cause cholesterol build up and blood clotting (B) Are prone to rancid oxidation (C ... (as their complete removal is very difficult) (D) Have affinity to retain harmful sulphur compounds
Last Answer : (A) Cause cholesterol build up and blood clotting
Description : A Mixture contain 88% of sulphur,another mixture contain 70% of sulphur.In order to get 84% of sulphur,in what ratio these two must be mixed. A) 2:7 B)7:2 C)7:4 D)4:5
Last Answer : B)7:2