Description : Citrulline is an intermediate of (A) TCA cycle (B) Urea cycle (C) Pentose cycle (D) Calvin cycle
Last Answer : Answer : B
Description : The integrator between the TCA cycle and urea cycle is (A) Fumarate (B) Malate (C) Pyruvate (D) Citrate
Last Answer : Answer : A
Description : Out of 24 mols of ATP formed in TCA cycle, 2 molecules of ATP can be formed at “substrate level” by which of the following reaction ? (A) Citric acid→ Isocitric acid (B) Isocitrate→ Oxaloacetate (C) Succinic acid→ Fumarate (D) Succinylcat→ Succinic acid
Last Answer : D
Description : All of the following compounds are intermediates of TCA cycle except (A) Maleate (B) Pyruvate (C) Oxaloacetate (D) Fumarate
Description : In TCA cycle, oxalosuccinate is converted to α-ketoglutarate by the enzyme: (A) Fumarase (B) Isocitrate dehydrogenase (C) Aconitase (D) Succinase
Description : The most important source of reducing equivalents for FA synthesis on the liver is (A) Glycolysis (B) HMP-Shunt (C) TCA cycle (D) Uronic acid pathway
Description : Most of the metabolic pathways are either anabolic or catabolic. Which of the following pathways is considered as “amphibolic” in nature? (A) Glycogenesis (B) Glycolytic pathway (C) Lipolysis (D) TCA cycle
Description : Before pyruvic acid enters the TCA cycle it must be converted to (A) Acetyl CoA (B) Lactate (C) α-ketoglutarate (D) Citrate
Last Answer : A
Description : One molecule of glucose gives ______ molecules of CO2 in EM-TCA cycle. (A) 6 (B) 3 (C) 1 (D) 2
Description : Substrate level phosphorylation in TCA cycle is in step: (A) Isocitrate dehydrogenase (B) Malate dehydrogenase (C) Aconitase (D) Succinate thiokinase
Description : The number of molecules of ATP produced by the total oxidation of acetyl CoA in TCA cycle is (A) 6 (B) 8 (C) 10 (D) 12
Description : Our body can get pentoses from (A) Glycolytic pathway (B) Uromic acid pathway (C) TCA cycle (D) HMP shunt
Description : Pentose production is increased in (A) HMP shunt (B) Uromic acid pathway (C) EM pathway (D) TCA cycle
Description : Why the bacterium Treponemapallidum is difficult to culture? A-.Because it requires a great deal of water to reproduce B- .Because it is unable to use carbohydrates as an energy source ... TCA cycle and oxidative phosphorylation D- Because it requires extremely low temperature at which water freezes
Last Answer : Because it lacks the genes needed for TCA cycle and oxidative phosphorylation
Description : In the synthesis of 1 molecule of urea in the Kreb’s Henseleit cycle the number of AMPs formed is (A) 1 (B) 2 (C) 3 (D) 4
Description : Why is the Krebs cycle called the TCA cycle ?
Last Answer : The first acid produced in the Krebs cycle is citric acid. Since citric acid contains three carboxylic (- COOH) radicals , the Krebs-cycle is called the TCA cycle or tri-carboxylic acid cycle.
Description : The best understood intracellular messenger is cyclic AMP (cAMP). Which of the following statement(s) concerning this intracellular messenger is/are correct? a. Intracellular cyclic AMP is constantly ... of adenylate cyclase d. cAMP is the only cyclic nucleotide active as an intracellular messenger
Last Answer : Answer: a, b The prototypic intracellular messenger is cAMP. To function as a mediator, the concentration of cAMP must change rapidly. In resting cells, cAMP is continuously being degraded by ... produce cGMP. Intracellular calcium ions also serve as second messengers in a large number of cells
Description : TCA cycle starts with the condensation of acetyl group with (A) _____ (B)_____ to yield citric acid.
Last Answer : TCA cycle starts with the condensation of acetyl group with (A) _____ (B)_____ to yield citric acid.
Description : All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase.
Last Answer : (c) succinate dehydrogenase
Description : Which of these statements is incorrect? (a) Enzymes of TCA cycle are present in mitochondrial matrix. (b) Glycolysis occurs in cytosol. (c) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Last Answer : (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Description : TCA cycle functions in A.catabolic reactions B.anabolic reactions C.amphibolic reactions D.none of these
Last Answer : C.amphibolic reactions
Description : Oxidative phosphorylation involves (A) Electron transport system (B) Substrate level phosphorylation (C) Reaction catalyzed by succinic thiokinase in TCA cycle (D) None of the above
Last Answer : (A) Electron transport system
Description : In the TCA cycle, at which of the following enzyme-catalyzed steps, incorporation of elements of water into an intermediate of the cycle takes place : (A) Citrate synthase (B) Aconitase (C) Maleate dehydrogenase (D) Succinyl Co-A synthase
Last Answer : (C) Maleate dehydrogenase
Description : Which of these statements is incorrect ? (1) Enzymes of TCA cycle are present in mitochondrial matrix. (2) Glycolysis occurs in cytosol. (3) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Last Answer : (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Description : TCA also known as a. Kreb’s Cycle b. Glycolysis c. Acetolysis d. None of the above
Last Answer : a. Kreb’s Cycle
Description : Synthesis of the following enzymes is increased during starvation. (A) Digestive enzymes (B) Gluconeogenic enzymes (C) Urea cycle enzymes (D) Glucokinase
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 : Cyclic AMP can be formed from (A) AMP (B) ADP (C) ATP (D) All of these
Last Answer : Answer : C
Description : Cyclic AMP is formed from ATP by the enzyme adenylate cyclase which is activated by the hormone: (A) Insulin (B) Epinephrine (C) Testosterone (D) Progesterone
Last Answer : B
Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons
Last Answer : there is delocalization of electrons
Description : During menstrual cycle, the cyclic changes take place in
Last Answer : During menstrual cycle, the cyclic changes take place in A. Myometrium B. Corpus luteum C. ... implanation -11 to 18 days D. Pertimetrium.
Description : Which layer of uterus undergoes cyclic changes during menstrual cycle
Last Answer : Which layer of uterus undergoes cyclic changes during menstrual cycle A. Myometrium B. Endometrium C. Perimetrium D. All the above.
Description : Retina contains this photo sensitive pigment. (A) Rhodopsin (B) Opsin (C) Retinol (D) Malanin
Description : Which of the following statements regarding Vitamin A is true? (A) It is not an essential Vitamin (B) It is related to tocopherol (C) It is a component of rhodopsin (D) It is also known as Opsin
Description : Retina contains this photosensitive pigment: (A) Rhodopsin (B) Opsin (C) Retinol (D) Melanin
Description : The non-protein part of rhodopsin is (A) Retinal (B) Retinol (C) Carotene (D) Repsin
Description : Retinoic acid is involved in the synthesis of (A) Rhodopsin (B) Iodopsin (C) Porphyrinopsin (D) Glycoproteins
Last Answer : Answer : D
Description : Rod cells possess a trans-membrane protein which is (A) Adenylate cyclase (B) Transducin (C) Rhodopsin (D) B as well as C
Description : Rhodopsin contains opsin and (A) 11-cis-retinal (B) 11-trans-retinal (C) All-cis-retinal (D) All trans-retinal
Description : On exposure to light rhodopsin forms (A) All trans-retinal (B) Cis-retinal (C) Retinol (D) Retinoic acid
Description : Retinoic acid participates in the synthesis of (A) Iodopsin (B) Rhodopsin (C) Glycoprotein (D) Cardiolipin
Description : Retinal is a component of (A) Iodopsin (B) Rhodopsin (C) Cardiolipin (D) Glycoproteins
Description : Non-protein part of rhodopsin is (A) Retinal (B) Retinol (C) Carotene (D) Repsin
Description : Inborn errors of urea cycle can cause all the following except (A) Vomiting (B) Ataxia (C) Renal failure (D) Mental retardation
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
Description : Clinical symptom in urea cycle disorder is (A) Mental retardation (B) Drowsiness (C) Diarrhoea (D) Oedema
Description : Along with CO2, NH3 and ATP, the amino acid that is needed in urea cycle is (A) Alanine (B) Isoleucine (C) Aspartate (D) Glycine
Description : Histidine is converted to histamine through the process of (A) Transamination (B) Decarboxylation (C) Oxidative deamination (D) Urea cycle