Description : Which of the following coenzyme takes part in oxidation-reduction reactions? (A) Pyridoxal phosphate (B) Lipoic acid (C) Thiamin diphosphate (D) None of these
Last Answer : Answer : B
Description : Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid
Last Answer : ANSWER: Z -- REACTION OF POTASSIUM HYDROXIDE WITH NITRIC ACID
Description : The reaction between an acid and a base to give a salt and water is known as a - (1) Neutralisation reaction (2) Reduction reaction (3) Oxidation reaction (4) Exothermic reaction
Last Answer : (1) Neutralisation reaction Explanation: The effect of a base is nullified by an acid and vice-versa. Example: Reaction of Sodium hydroxide with hydrochloric acidNaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
Description : The fundamental scientific principle in the operation of battery is – (1) acid-base interaction (2) dialysis (3) dissociation of electrolytes (4) oxidation-reduction
Last Answer : (3) dissociation of electrolytes Explanation: The electrolyte consists of a solvent (water, an organic liquid, or even a solid) and one or more chemicals that dissociate into ions in the solvent. These ... that contains ions and can be decomposed by electrolysis, e.g., that present in a battery.
Description : The fundamental scientific principle in the operation of battery is (1) acid-base interaction (2) dialysis (3) dissociation of electrolytes (4) oxidation-reduction
Last Answer : dissociation of electrolytes
Description : The common features of introns include all the following except (A) The base sequence begins with GU (B) The base sequence ends with AG (C) The terminal AG sequence is preceded by a purine rich tract of ten nucleotides (D) An adenosine residue in branch site participates in splicing
Last Answer : Answer : C
Description : Which of the following reactions involves neither oxidation nor reduction ?
Last Answer : Which of the following reactions involves neither oxidation nor reduction ? A. `CrO_(4)^(2-)rarrCr_(2)O_(7)^(2-)` ... 2)O_(3)^(2-)rarrS_(4)O_(6)^(2-)`
Description : Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these
Last Answer : Answer : D
Description : Retinoic acid participates in the synthesis of (A) Iodopsin (B) Rhodopsin (C) Glycoprotein (D) Cardiolipin
Description : The Golgi complex participates in (a) fatty acid breakdown (b) formation of secretory vesicles (c) respiration in bacteria (d) activation of amino acid
Last Answer : b) formation of secretory vesicles
Description : The Golgi complex participates in (1) Fatty acid breakdown (2) Formation of secretory vesicles (3) Respiration in bacteria (4) Activation of amino acid
Last Answer : (2) Formation of secretory vesicles
Description : Air over the oceans is colder in summer and warmer in winter compared with air over the continental regions. This is because (a) Water is translucent and has a relatively high heat capacity compared ... B are true (e) The effect is due to the changes in circulation between continents and oceans
Last Answer : (d) Both A and B are true
Description : A substance which readily forms colloidal solution in contact with water is called (1) Extrinsic colloid (2) Associated colloid (3) Hydrophobic colloid (4) Hydrophilic colloid
Last Answer : Hydrophilic colloid
Description : In most mammals, except primates, uric acid is metabolized by (A) Oxidation to allantoin (B) Reduction to NH3 (C) Hydrolysis to allantoin (D) Hydrolysis to NH3
Last Answer : Answer : A
Description : In mammals other than higher primates uric acid is converted by (A) Oxidation to allantoin (B) Reduction to ammonia (C) Hydrolysis to ammonia (D) Hydrolysis to allantoin
Description : Decomposition of the acetyl salicylic acid at room temperature most likely would occur by (a) Oxidation of the ester (b) Reduction of the carboxylic acid (c) Hydrolysis of the ester
Last Answer : Ans: C
Description : The action of concentrated sulfuric acid on sugar best described as: w) catalysis x) oxidation y) reduction z) dehydration
Last Answer : ANSWER: Z -- DEHYDRATION
Description : Which of the following most readily undergoes `E_(2)` elimination with a strong base?
Last Answer : Which of the following most readily undergoes `E_(2)` elimination with a strong base? A. 2- ... -Bromo-2,2-dimethylpropane D. 2-Bromo-3-methylbutane
Description : What is the name of the system that participates in digestion ?
Last Answer : The system that takes part in digestion is called digestive system.
Last Answer : South Korea has participated in the World Cup 10 times
Description : During gamete formation, the enzyme recombinate participates during
Last Answer : During gamete formation, the enzyme recombinate participates during A. Prophase-I B. Prophase-II C. Metaphase-I D. Anaphase-II
Description : The online persona of someone who participates online for social reasons is usually?
Last Answer : informal
Description : Which animals make tracheal respiration? Is there a blood-like fluid that participates in this process?
Last Answer : Insects and arachnids are the arthropod animals that make tracheal respiration. In the body surface of these animals there are many orifices called spiracles that communicate with small ... insects the blood only transports nutrients; gases are independently transported by the tracheal system.
Description : During gamete formation, the enzyme recombinase participates during (a) metaphase I (b) anaphase II (c) prophase I (d) prophase II
Last Answer : (c) prophase I
Description : In which of the following cell mediated immunity (CMI) participates? A.Delayed hypersensitivity reaction B.Graft versus host reaction C.Allograft rejection D.All of the above
Last Answer : D.All of the above
Last Answer : .All of the above
Description : Montgomery Transport, a freight carrier, serves as __________ in the marketing channels in which it participates. A)a drop shipper B)a rack jobber C)a sales office D)an agent E)a facilitating agency
Last Answer : E)a facilitating agency
Description : During gamete formation, the enzyme recombinase participates during (1) Prophase-II (2) Metaphase-I (3) Anaphase-II (4) Prophase-I
Last Answer : (4) Prophase-I
Description : _______ organ participates maximum in cholesterol Biosynthesis. a. Liver. b. Intestine. c. Skin. d. Adrenal Cortex
Last Answer : a. Liver.
Description : A Teacher Can Get Important Place In Society If He Options: A) Performs The Role Of An Active Member The Political Party In Power B) Is Scholar And In Power C) Participates Actively In Social Activities D) Performs His Responsibility Honestly
Last Answer : D) Performs His Responsibility Honestly
Description : Which is the substance which can act both as an acid and a base? -Do You Know?
Last Answer : answer:
Description : Which is the substance which can act both as an acid and a base?
Last Answer : Amphoteric
Description : hich is the substance which can act both as an acid and a base?
Description : Rancidity in sunflower oil is due to — reaction. a. Reduction b. Oxidation c. Both a & b d. None of these
Last Answer : b. Oxidation
Description : In the treatment of chronic inflammatory diseases, the most important limitation of aspirin is (a) Acid – base and electrolytc disturbances (b) Hypersensitivity and idiosyncratic reactions (c) Gastric mucosal damage (d) Salicylism
Description : Which one of the following statements about buffers is false? a. They work inside cells. b. They consist of a weak acid and weak base. c. They prevent pH shifts. d. They enhance chemical reactions.
Last Answer : d. They enhance chemical reactions.
Description : In the treatment of chronic inflammatory diseases, the most important limitation of aspirin is: A. Acid-base and electrolyte disturbances B. Hypersensitivity and idiosyncratic reactions C. Gastric mucosal damage D. Salicylism
Last Answer : C. Gastric mucosal damage
Description : In protolytic reactions in which the reactants are much stronger as an acid and a base than the products, the proton transfer reaction: w) does not occur x) approaches completeness y) produces a much stronger acid and a much weaker base z) produces a much weaker acid and a much stronger base
Last Answer : ANSWER: X -- APPROACHES COMPLETENESS
Description : Which of the following chemical reactions does not lead to formation of a salt? w) Reaction of salts with acids. x) The reaction of base anhydrides with acid anhydrides. y) Action of water on oxides of nonmetals. z) Reaction of acid with base.
Last Answer : ANSWER: Y -- ACTION OF WATER ON OXIDES OF NONMETALS. (If water reacts with oxides of nonmetals, an acid is formed.)
Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl
Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid
Description : Aniline undergoes oxidation with Na2Cr2O7/H2SO4 to give (a) Schiff's base (b) p-Benzoquinone (c) Phenol (d) Benzoic acid
Last Answer : p-Benzoquinone
Description : A substance that accepts an electron pair is classified as a: w) bronsted-lowry acid x) bronsted-lowry base y) lewis acid z) lewis base
Last Answer : ANSWER: Y -- LEWIS ACID
Description : Which of the following reduction reactions does not give an amine as product?
Last Answer : Which of the following reduction reactions does not give an amine as product? A. `R-NO_(2) underset(" ... (2)underset(Delta)overset(Zn//NH_(4)Cl)rarr`
Description : Which of the following reduction reactions are actually employed in commercial extraction of metals ?
Last Answer : Which of the following reduction reactions are actually employed in commercial extraction of metals ? A. `Fe_(2 ... + 2CuO rarr 3Cu + SO_(2) uparrow `
Description : Which of the following reduction reactions are actually employed in commercial extraction of metals?
Last Answer : Which of the following reduction reactions are actually employed in commercial extraction of metals? A. `Fe_(2)O_(3 ... (2)S + 2CuO rarr 6Cu + SO_(2)`
Description : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?
Last Answer : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron ... CO` D. `CO_(2)+C rarr 2CO`
Description : Fight-or-flight reactions cause activation of (a) the parathyroid glands, leading to increased metabolic rate (b) the kidney, leading to suppression of renin- angiotensin-aldosterone pathway (c) ... epinephrine and norepinephrine (d) the pancreas leading to a reduction in the blood sugar levels.
Last Answer : (c) the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine
Description : Which of the following reactions is suitable for the preparation of α-amino acids? (a) Schmidt reaction (b) Hofmann's degradation of amides (c) Strecker's synthesis (b) Reduction of nitro compounds
Last Answer : Strecker's synthesis
Description : Which of the following reactions can be used to prepare alkanes? (a) Wurtz reaction (b) Wolf-kishner reduction (c) Kolbe's electrolysis (d) All of these
Last Answer : All of these