MCQOPTIONS
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MCQOPTIONS
This section includes 436 Mcqs, each offering curated multiple-choice questions to sharpen your Medical Subjects knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Key glycolytic enzymes_____________? |
| A. | Phosphofructokinase |
| B. | Hexokinase |
| C. | Pyruvate kinase |
| D. | Glucose 1,6 diphosphatase |
| Answer» B. Hexokinase | |
| 252. |
Key enzyme in urea synthesis is____________? |
| A. | Urease |
| B. | Carbamyl synthetase |
| C. | Arginase |
| D. | Ornithine |
| Answer» C. Arginase | |
| 253. |
Ketone body formation takes place in_______________? |
| A. | Liver |
| B. | Kidney |
| C. | Spleen |
| D. | Blood |
| Answer» B. Kidney | |
| 254. |
Ketone bodies are normally synthesized from______________? |
| A. | Acetyl-CoA |
| B. | Glucose |
| C. | Glycerol |
| D. | Acetone |
| Answer» B. Glucose | |
| 255. |
Ketone bodies are by products of metabolism of_____________? |
| A. | Carbohydrate |
| B. | Protein |
| C. | Fat |
| D. | All of the above |
| Answer» D. All of the above | |
| 256. |
Iron is present in all of the following except_______________? |
| A. | Myoglobin |
| B. | Cytochrome |
| C. | Catalase |
| D. | Pyruvate kinase |
| Answer» E. | |
| 257. |
Iron is present in all, EXCEPT______________? |
| A. | Myoglobin |
| B. | Cytochrome |
| C. | Catalase |
| D. | Pyruvate kinase |
| Answer» E. | |
| 258. |
Iron is complexed in haemoglobin to_______________? |
| A. | Leucine |
| B. | Histidine |
| C. | Isoleucine |
| D. | Valine |
| Answer» C. Isoleucine | |
| 259. |
Iron absorption is decreased in presence of all except____________? |
| A. | Phytates |
| B. | Ascorbic acid |
| C. | Tannins |
| D. | Phosphates |
| Answer» C. Tannins | |
| 260. |
Insulin increase the following pathways in liver EXCEPT____________? |
| A. | Fatty acid synthesis |
| B. | Glycogen synthesis |
| C. | Protein syntehsis |
| D. | Glucose synthesis |
| Answer» E. | |
| 261. |
Insulin caused lipogenesis by all except____________? |
| A. | Increasing acetyl-CoA corboxylase activity |
| B. | Increases the transport of glucose in to the cells |
| C. | Inhibits Pyruvate dehydrogenase |
| D. | Decreases intracellular cAMP level |
| Answer» D. Decreases intracellular cAMP level | |
| 262. |
Insulin acts on which enzyme in glycolysis ? |
| A. | Glucokinase |
| B. | Hexokinase |
| C. | Glucose 6 phosphatase |
| D. | Adenylate kinase |
| Answer» B. Hexokinase | |
| 263. |
Inside the cell, the substance, which contributes to most of the osmolality, is________________? |
| A. | Protein |
| B. | Potassium |
| C. | Urea |
| D. | Phosphate |
| Answer» C. Urea | |
| 264. |
Inhibition of glycolysis by O2 is known a_____________? |
| A. | Muni effect |
| B. | Pasteur effect |
| C. | Hill reaction |
| D. | Gluconeogenesis |
| Answer» C. Hill reaction | |
| 265. |
Indole ring is present in______________? |
| A. | Tryptophan |
| B. | Valine |
| C. | Methionine |
| D. | Histidine |
| Answer» B. Valine | |
| 266. |
Increase in pyruvate and lactate is seen in which of the following deficiency ? |
| A. | Thiamine |
| B. | Pyridoxine |
| C. | Niacin |
| D. | Vitamin C |
| Answer» B. Pyridoxine | |
| 267. |
Increase in lactate and pyruvate is seen in deficiency of_____________? |
| A. | Pyridoxin |
| B. | Niacin |
| C. | Thiamine |
| D. | Retinotic acid |
| Answer» D. Retinotic acid | |
| 268. |
Inactive precursors of enzymes are known as_______________? |
| A. | Apoenzymes |
| B. | Coenzymes |
| C. | Proenzymes |
| D. | Holoenzymes |
| Answer» D. Holoenzymes | |
| 269. |
In which type of glycogen storage disease is hyper uricemia a feature ? |
| A. | I |
| B. | II |
| C. | III |
| D. | IV |
| Answer» B. II | |
| 270. |
In vitamin A deficiency, patient complains of all of the following except___________? |
| A. | Night blindness |
| B. | Xerophthalmia |
| C. | Keratosis |
| D. | Phophoric calciuria |
| Answer» E. | |
| 271. |
In the physiological system, nitric oxide is known to act through_______________? |
| A. | Cyclic AMP |
| B. | Calcium ions |
| C. | Cyclic GMP |
| D. | Prostacyclins |
| Answer» D. Prostacyclins | |
| 272. |
In the body, metabolism of 10 g of protein would produce approximately____________? |
| A. | 1 Kcal |
| B. | 41 Kcal |
| C. | 410 Kcal |
| D. | 4100 Kcal |
| Answer» C. 410 Kcal | |
| 273. |
In TCA cycle substrate level phosphorylation occurs at____________? |
| A. | Succinate dehydrogenase |
| B. | Malonate reduction |
| C. | Thiokinase |
| D. | None of the above |
| Answer» D. None of the above | |
| 274. |
In TCA cycle, citrate is converted in to after losing a molecule of H2O_____________? |
| A. | Isocitrate |
| B. | Cisaconitate |
| C. | Oxalocetate |
| D. | Glutarate |
| Answer» C. Oxalocetate | |
| 275. |
In TCA, substrate level phospherylation takes place in______________? |
| A. | Alpha ketoglutrate to succinyl CoA |
| B. | Succinyl CoA to Succinate |
| C. | Succinate to fumarate |
| D. | Oxalocetate to citrate |
| Answer» C. Succinate to fumarate | |
| 276. |
In TCA cycle or tricarboxylic acid cycle, which is first formed________________? |
| A. | Isocitrate |
| B. | Citrate |
| C. | Succinate |
| D. | Fumarate |
| Answer» C. Succinate | |
| 277. |
In prolonged starvation the main nergy source of brain is_____________? |
| A. | Glucose |
| B. | Ketone bodies |
| C. | Fructose |
| D. | Fatty acids |
| Answer» C. Fructose | |
| 278. |
In Niemann-Pick’s disease the following substrance accumulate in CNS in excess______________? |
| A. | Glycerophosphatides |
| B. | Phosphoinositides |
| C. | Phosphosphingosides |
| D. | Glycerosphingosides |
| Answer» D. Glycerosphingosides | |
| 279. |
In mycocarrdial infarction the first enzyme to rise____________? |
| A. | CPK |
| B. | LDH |
| C. | SGOT |
| D. | Amylase |
| Answer» B. LDH | |
| 280. |
In molecular cloning, Blue White screening is used for_______________? |
| A. | To screen for recombinant vectors |
| B. | To detect gene mutations |
| C. | To identify desired chromosomal DNA insert in plasmid vectors |
| D. | To detect host DNA in situ |
| Answer» D. To detect host DNA in situ | |
| 281. |
In maple syrup urine disease the amino acids excreted in the urine are______________? |
| A. | Leucine |
| B. | Isoleucine |
| C. | Valine |
| D. | All of the above |
| Answer» E. | |
| 282. |
In humans and other primates as well as in guinea pigs, this vitamin cannot be synthesized because of the absence of the enzyme L-gulonolactone oxidase: the vitamin is_____________? |
| A. | Pantothenic acid |
| B. | Nicotinic acid |
| C. | Ascorbic acid |
| D. | Folic acid |
| Answer» D. Folic acid | |
| 283. |
In human body which of the following trace element is next to iron_______________? |
| A. | Ca++ |
| B. | Zn++ |
| C. | Cu++ |
| D. | Selenium |
| Answer» C. Cu++ | |
| 284. |
In Hartnup’s disease _______ is excreted in the urine? |
| A. | Ornithine |
| B. | Glutamine |
| C. | Tryptophan |
| D. | Phenylalanine |
| Answer» D. Phenylalanine | |
| 285. |
In glycolysis ATP is produced by the following enzyme______________? |
| A. | Hexokinase |
| B. | Phosphoglycerate kinase |
| C. | Enolase |
| D. | Phosphohexose isomerase |
| Answer» C. Enolase | |
| 286. |
In ECF main electrolyte is_______________? |
| A. | Na+ |
| B. | K+ |
| C. | Cl |
| D. | Proteins |
| Answer» B. K+ | |
| 287. |
In Cytochrome p450, P stands for____________? |
| A. | Structural proteins |
| B. | Substrate protiens |
| C. | Pigment |
| D. | Polymer |
| Answer» D. Polymer | |
| 288. |
In all the following RNA participates directly except________________? |
| A. | Post translation modification |
| B. | Post transcriptional modification |
| C. | DNA replication |
| D. | Splicing |
| Answer» B. Post transcriptional modification | |
| 289. |
If bile acid recycling time is short, then bile salt reservoir pool will be______________? |
| A. | Increased |
| B. | Decreased |
| C. | Uchanged |
| D. | Has no effect |
| Answer» C. Uchanged | |
| 290. |
Hyponatremia is defined as a serum Na+ level ____________________? |
| A. | < 135 mmol/L |
| B. | >135 mmol/L |
| C. | < 160 mmo/L |
| D. | < 100 mmo/L |
| Answer» B. >135 mmol/L | |
| 291. |
Hydroxylation of proline require the following except____________? |
| A. | Fe+2 |
| B. | O2 |
| C. | Ascorbic acid |
| D. | Succinate |
| Answer» E. | |
| 292. |
HMP shunt is of great importance in cellular metabolism because its produces_____________? |
| A. | ATP |
| B. | ADP |
| C. | Acetyl CoA |
| D. | NADPH |
| Answer» E. | |
| 293. |
HMG CoA reductase is inhibited by_____________? |
| A. | Clofibrate |
| B. | Gemfibrosil |
| C. | Lovastatin |
| D. | cholestyramine |
| Answer» D. cholestyramine | |
| 294. |
HMG-CoA is formed during metabolism of all except______________? |
| A. | Cholesterol |
| B. | Leucine |
| C. | Ketone bodies |
| D. | Bile acids |
| Answer» E. | |
| 295. |
Histidine is converted to histamine by_____________? |
| A. | Transamination |
| B. | Hydroxylation |
| C. | Decarboxylation |
| D. | Reduction |
| Answer» D. Reduction | |
| 296. |
Highest binding of iron in plasma is seen with___________? |
| A. | Transferrin |
| B. | Ferritin |
| C. | Hemoglobin |
| D. | Ceruloplasmin |
| Answer» B. Ferritin | |
| 297. |
High content of cholesterol is present in_______________? |
| A. | Coconut oil |
| B. | Egg yolk |
| C. | Hydrogenated fat |
| D. | Ghee (unsaturated) |
| Answer» C. Hydrogenated fat | |
| 298. |
Hexokinase is a______________? |
| A. | Transferase |
| B. | Reductase |
| C. | Oxidoreductase |
| D. | Oxidase |
| Answer» B. Reductase | |
| 299. |
Heme is converted to bilirubin mainly in_____________? |
| A. | Kidney |
| B. | Liver |
| C. | Spleen |
| D. | Bone marrow |
| Answer» D. Bone marrow | |
| 300. |
Heme in haemoglobin is____________? |
| A. | Between Helix C and D |
| B. | Surrounded by non polar environment |
| C. | Bonded to E7 histidine |
| D. | Protoporophyrin IX |
| Answer» E. | |