Description : An amino acid not involved in urea cycle is (A) Arginine (B) Histidine (C) Ornithine (D) Citrulline
Last Answer : Answer : B
Description : In urea synthesis, the amino acid functioning solely as an enzyme activator: (A) N-acetyl glutamate(B) Ornithine (C) Citrulline (D) Arginine
Last Answer : Answer : A
Description : Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood. (A) Calcium (B) Sodium (C) Ammonia (D) Lipid
Last Answer : Answer : C
Description : The metabolite which sustains urea cycle is (A) Ornithine (B) Citrulline (C) Carbamoyl phosphate (D) n-acetyl glutamate
Description : The amino acid which contains a guanidine group is (A) Histidine (B) Arginine (C) Citrulline (D) Ornithine
Description : ATP is required in following reactions of urea cycle: (A) Synthesis of carbamoyl phosphate and citrulline (B) Synthesis of citrulline and argininosuccinate (C) Synthesis of argininosuccinate and arginine (D) Synthesis of carbamoyl phosphate and argininosuccinate
Description : The following 4 amino acids are required for completion of urea cycle except (A) Aspartic acid (B) Arginine (C) Ornithine (D) Glycine
Last Answer : Answer : D
Description : The ornithine cycle removes two waste products from the blood in liver. These products are (a) CO2 and ammonia (b) ammonia and uric acid (c) CO2 and urea (d) ammonia and urea.
Last Answer : a) CO2 and ammonia
Description : In ornithine cycle, which of the following wastes are removed from the blood? (a) CO2 and urea (b) Ammonia and urea (c) CO2 and ammonia (d) Urea and urine
Last Answer : (c) CO2 and ammonia
Description : In Krebs’ cycle, the FAD precipitates as electron acceptor during the conversion of (a) fumaric acid to malic acid (b) succinic acid to fumaric acid (c) succinyl CoA to succinic acid (d) α-ketoglutarate to succinyl CoA.
Last Answer : (b) succinic acid to fumaric acid
Description : In ornithine cycle, enzyme arginase breaks down arginine into
Last Answer : In ornithine cycle, enzyme arginase breaks down arginine into A. Citrulline and ammonia B. Ornithine ... C. Ornithine and urea D. Citruline and urea
Description : Citrulline is an intermediate of (A) TCA cycle (B) Urea cycle (C) Pentose cycle (D) Calvin cycle
Description : Control of urea cycle involves the enzyme: (A) Carbamoyl phosphate synthetase (B) Ornithine transcarbamoylase (C) Argininosuccinase (D) Arginase
Description : In ureotelic animals, urea is formed by (a) Krebs’ cycle (b) EM pathway (c) Ornithine cycle (d) Cori cycle.
Last Answer : (c) Ornithine cycle
Description : Conversion of ammonia to urea is done by `…......................` Cycl -
Last Answer : Conversion of ammonia to urea is done by `…......................` Cycl - A. Ornithine cycle B. Arginine cycle C. Fumaric cycle D. Citrulline cycle
Last Answer : Conversion of ammonia to urea is done by `…......................` Cycl - A. Omithine cycle B. Arginine cycle C. Fumaric cycle D. Citrulline cycle
Description : The acid amide of Aspartic acid is (A) Glutamine (B) Arginine (C) Aspargine (D) Ornithine
Description : Sakaguchi reaction is answered by (A) Lysine (B) Ornithine (C) Arginine (D) Arginino succinic acid
Description : Hyperargininemia, a defect in urea synthesis develops due to deficiency of the enzyme: (A) Ornithine transcarbamoylase (B) Argininosuccinase (C) Arginase (D) Argininosuccinate synthetase ENZYMES 157
Description : Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done. (A) Increased biuret formation (B) High corrosion rate (C) Increased cost of equipment (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : (3) Conversion of ammonia to nitrites Explanation: Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The oxidation of ammonia ... -oxidizing archaea (AOA). Nitrification is an important step in the nitrogen cycle in soil.
Last Answer : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorous (4) None of these
Description : Dehydrogenation of succinic acid to fumaric acid requires the following hydrogen carrier: (A) NAD+ (B) NADP+ (C) flavoprotein (D) Glutathione
Last Answer : C
Description : Which one of the following pair of waste substances is removed from blood in ornithine cycle `:`
Last Answer : Which one of the following pair of waste substances is removed from blood in ornithine cycle `:` A. ` ... CO_(2)` and ammonia D. Urea and sodium salt
Description : Ornithine cycle performs
Last Answer : Ornithine cycle performs A. ATP synthesis B. Urea formation in spleen C. Urea formation in liver D. Urin formation in liver
Description : Ornithine cycle operates in
Last Answer : Ornithine cycle operates in A. Stomach B. Pancreas C. Liver D. Oral cavity
Description : Ornithine cycle is related to
Last Answer : Ornithine cycle is related to A. Respiration B. Excretion C. Digestion D. Nutrition
Description : The compound having the formula H2N—CO—NH—CH2—CH2—CH2—CH— COOH is | NH2 (A) Lysine (B) Glutamine (C) Serine (D) Citrulline
Description : By which enzyme is Urea converted into ammonia and carbon dioxide? -Do You Know?
Last Answer : answer:
Description : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the
Last Answer : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason ` ... . D. If both Assertion & Reason are false.
Description : Ammonia is converted into urea in
Last Answer : Ammonia is converted into urea in A. Heart B. Spleen C. Liver D. Brain
Description : In comparison to urea ammonia is
Last Answer : In comparison to urea ammonia is A. Less toxic B. Toxic C. Highly toxic D. None
Description : For formation of urea which one of the following is required alongwith ammonia
Last Answer : For formation of urea which one of the following is required alongwith ammonia A. Arginase, `CO_(2)` and `O_(2 ... D. Asparate, `CO_(2)` and `O_(2)`
Description : Ammonia is converted into urea in _____ and filtered from blood and excreted out by_____
Last Answer : Ammonia is converted into urea in _____ and filtered from blood and excreted out by_____
Description : Urea is prepared by the chemical reactions of (a) Ammonium sulphate and calcium chloride (b) Ammonia and carbon dioxide (c) Chlorine and water (d) Acetamide and ethyl alcohol
Last Answer : Ans: (b)
Description : Ammonia is excreted as ammonium salts during metabolic acidosis but the majority is excreted as (A) Phosphates (B) Creatine (C) Uric acid (D) Urea
Description : From dietary protein as well as from the urea present in fluids secreted into the gastrointestinal tract intestinal bacteria produce (A) Carbondioxide (B) Ammonia (C) Ammonium sulphate (D) Creatine
Description : The unwanted amino acids abstracted from the tissues are either used up by the tissue or in the liver converted into (A) Ammonia (B) Urea (C) Ammonium salts (D) Uric acid
Description : Cytosolic and mitochondrial carbamoyl phosphate synthetase have the following similarity: (A) Both use ammonia as a substance (B) Both provide carbamoyl phosphate for urea synthesis (C) Both require N-acetylglutamate as an activator (D) Both are allosteric enzymes
Description : The 2 nitrogen atoms in urea are contributed by (A) Ammonia and glutamate (B) Glutamine and glutamate (C) Ammonia and aspartate (D) Ammonia and alanine
Description : Which of the following is a balanced fertilizer for plants? (a) Urea (b) Ammonia sulphate (c) Nitrates (d) Compost
Last Answer : Ans:(d)
Description : Higher plants take up nitrogen as (a) Nitrites only (b) Nitrates only (c) Nitrates and ammonia (d) Urea
Last Answer : Ans:(c)
Description : Plants absorb dissolved nitrates from soil and convert them into (a) Free nitrogen (b) Urea (c) Ammonia (d) Proteins
Last Answer : Ans:(a)
Description : By which enzyme is Urea converted into ammonia and carbon dioxide?
Last Answer : Urease
Description : Nitrogenous waste products are eliminated mainly as (a) urea in tadpole and ammonia in adult frog (b) ammonia in tadpole and urea in adult frog (c) urea in both tadpole and adult frog (d) urea in tadpole and uric acid in adult frog.
Last Answer : (b) ammonia in tadpole and urea in adult frog
Description : Select the option which shows correct matching of animal with its excretory organ and excretory product. Animal Excretory Excretory organ product (a) Labeo (Rohu) Nephridial Ammonia tubes (b) Salamander Kidneys Urea (c) Peacock Kidneys Urea (d) Housefly Renal tubules Uric acid
Last Answer : (b) Salamander Kidneys Urea
Description : The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of (a) urea (b) calcium carbonate (c) ammonia (d) potassium urate.
Last Answer : (d) potassium urate.
Description : Which of the following fertilisers contains the least percentage of nitrogen? (A) Liquid ammonia (B) Urea (C) Ammonium phosphate (D) Ammonium sulphate
Last Answer : (C) Ammonium phosphate
Description : Urea (a nitrogenous fertiliser) is produced from carbon dioxide and (A) Nitric acid (B) Ammonia (C) Ammonium nitrate (D) Nitric oxide
Last Answer : (B) Ammonia