Description : All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phopholipids (D) Rotation of phospholipids around their long axes
Last Answer : C
Description : Which of the following phospholipids is localized to a greater extent in the outer leaflet of the membrane lipid bilayer? (A) Choline phosphoglycerides (B) Ethanolamine phosphoglycerides (C) Inositol phosphoglycerides (D) Serine phosphoglycerides
Last Answer : A
Description : Which of the following statement(s) is/are true concerning the cell plasma membrane? a. The plasma membrane is composed of amphipathic molecules b. The hydrophobic core of the lipid bilayer of the ... contribute to the cell coat d. The membrane proteins of nerve cells are highly voltage-dependent
Last Answer : Answer: a, b, d The plasma membrane defines the boundary of the cell and serves to contain and concentrate enzymes and other macromolecule constituents. The plasma membrane is ... and bear carbohydrate moieties primarily as oligosaccharide chains that contribute to the cell coat or glycocalyx
Description : The basic structure of cell membranes (a) Is a lipid bilayer that serves as a barrier to water soluble molecules (b) Differs ultra structurally for internal and external membranes ... dispersed within a protein bilayer (d) Is visualised as bilaminar structure with transmission electron microscopy
Last Answer : Ans:(a)
Description : According to widely accepted fluid mosaic model cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several ... domains of the membrane. (d) Many proteins remain completely embedded within the lipid bilayer.
Last Answer : (b) Proteins can also undergo flip-flop movements in the lipid bilayer.
Description : The membrane protein that extend through both sides of lipid bilayer. (a) Acidic protein (b) Glycoprotein © Intrinsic protein (d) Glycolic acid
Last Answer : Answer: c Intrinsic protein
Description : All the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains (B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phospholipids (D) Rotation of phospholipids around their long axes
Last Answer : (C) Transbilayer diffusion of phospholipids
Last Answer : (A) Choline phosphoglycerides
Description : Seminal plasma in human males is rich in (a) fructose and calcium (b) glucose and calcium (c) DNA and testosterone (d) ribose and potassium.
Last Answer : (a) fructose and calcium
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 plasma membrane consists mainly of (a) phospholipids embedded in a protein bilayer (b) proteins embedded in a phospholipid bilayer (c) proteins embedded in a polymer of glucose molecules (d) proteins embedded in a carbohydrate bilayer
Last Answer : (b) proteins embedded in a phospholipid bilayer
Description : Which of the following organ prefers fructose to glucose (A) Liver (B) Testes (C) Pancreas (D) Heart
Last Answer : Answer : B
Description : Glucocorticoids increase the synthesis of all of the following except (A) Glucokinase (B) Glucose-6-phosphatase (C) Fructose-1, 6-biphosphatase (D) Pyruvate carboxylase
Last Answer : Answer : A
Description : A substrate for the enzyme aldolase is (A) galactose-6-phosphate (B) isocitric acid (C) Glucose-1-phosphate (D) Fructose 1, 6 diphosphate
Last Answer : Answer : D
Description : Hemolytic anemia is caused by the deficiency of certain enzymes of the pentose phosphate pathway, the principal enzyme involved is (A) Glucose-6-phosphate dehydrogenase (B) Aldolase (C) Fructose 1, 6-bisphosphatase (D) Phosphohexose isomerase
Description : Pentose phosphate pathway is of significance because it generates (A) NADPH for reductive synthesis (B) Regenerates glucose 6-phosphate (C) Generates fructose 6-phosphate (D) Forms glyceraldehyde 3-phosphate
Description : A reaction which may be considered an isomerisation is (A) Glucose 6-Phosphate fructose 6 phosphate (B) 3-Phosphoglycerate 2-phosphoglycerate (C) 2-phosphoglycerate phosphoenolpyruvate (D) Pyruvate Lactate
Description : Hexokinase is inhibited in an allosteric manner by (A) Glucose-6-Phosphate (B) Glucose-1-Phosphate (C) Fructose-6-phosphate (D) Fructose-1, 6-biphosphate
Description : In the intestine the rate of absorption is highest for (A) Glucose and galactose (B) Fructose and mannose (C) Fructose and pentose (D) Mannose and pentose
Description : The sugar absorbed by fac i l itated diffusion and requiring Na independent transporter is (A) Glucose (B) Fructose (C) Galactose (D) Ribose
Description : Spermatozoa in seminal fluid utilises the following sugar for metabolism: (A) Galactose (B) Glucose (C) Sucrose (D) Fructose
Description : Selwanof’s test is positive in (A) Glucose (B) Fructose (C) Galactose (D) Mannose
Description : Milk sugar is known as (A) Fructose (B) Glucose (C) Sucrose (D) Lactose
Description : Fatty acids can not be converted into carbohydrates in the body, as the following reaction is not possible: (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1, 6 diphosphate to ... phosphate (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids
Description : Starch and glycogen are polymers of (A) Fructose (B) Mannose (C) α−D-Glucose (D) Galactose
Description : Epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose
Last Answer : B
Description : Which of the following reactions is unique to gluconeogenesis? (A) Lactate Pyruvate (B) Phosphoenol pyruvate pyruvate (C) Oxaloacetate phosphoenol pyruvate (D) Glucose-6-phosphate Fructose-6-phosphate
Description : Which one of the following statements concerning glucose metabolism is correct? (A) The conversion of Glucose to lactate occurs only in the R.B.C (B) Glucose enters most cells by a mechanism in ... ) An elevated level of insulin leads to a decreased level of fructose 2, 6-bisphosphate in hepatocyte
Description : Which of the following is a substrate for aldolase activity in Glycolytic pathway? (A) Glyceraldehyde-3-p (B) Glucose-6-p (C) Fructose-6-p (D) Fructose1, 6-bisphosphate
Last Answer : D
Description : The 4 rate limiting enzymes of gluconeogenesis are (A) Glucokinase, Pyruvate carboxylae phosphoenol pyruvate carboxykinase and glucose-6-phosphatase (B) Pyruvate carboxylase, phosphoenol ... fructokinase, pyruvate carboxylase, phosphoenol pyruvate carboxykinase and fructose 1, 6 diphosphatase
Description : Fatty acids cannot be converted into carbohydrates in the body as the following reaction is not possible. (A) Conversion of glucose-6-phosphate into glucose (B) Fructose 1,6-bisphosphate to fructose- ... (C) Transformation of acetyl CoA to pyruvate (D) Formation of acetyl CoA from fatty acids
Description : Cane sugar (Sucrose) injected into blood is (A) changed to fructose (B) changed to glucose (C) undergoes no significant change (D) changed to glucose and fructose
Description : Cerebrosides consist of mostly of this sugar: (A) Glucose (B) Fructose (C) Galactose (D) Arabinose
Description : The epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose
Description : Which of the following is an epimeric pair? (A) Glucose and fructose (B) Glucose and galactose (C) Galactose and mannose (D) Lactose and maltose
Description : The smallest monosaccharide having furanose ring structure is (A) Erythrose (B) Ribose (C) Glucose (D) Fructose
Description : A carbohydrate, known commonly as invert sugar, is (A) Fructose (B) Sucrose (C) Glucose (D) Lactose
Description : A carbohydrate, commonly known as dextrose is (A) Dextrin (B) D-Fructose (C) D-Glucose (D) Glycogen
Description : Osazones are not formed with the (A) Glucose (B) Fructose (C) Sucrose (D) Lactose
Description : A positive Seliwanoff’s test is obtained with (A) Glucose (B) Fructose (C) Lactose (D) Maltose
Description : The constituent unit of inulin is (A) Glucose (B) Fructose (C) Mannose (D) Galactose
Description : Sucrose consists of (A) Glucose + glucose (B) Glucose + fructose (C) Glucose + galactose (D) Glucose + mannose
Description : The sugar found in milk is (A) Galactose (B) Glucose (C) Fructose (D) Lactose
Description : The most important epimer of glucose is (A) Galactose (B) Fructose (C) Arabinose (D) Xylose
Description : Glucose and fructose are reducing sugars, but sucrose (containing glucose and fructose) is a non-reducing sugar, why?
Last Answer : Because the glycosidic linkage in sucrose involves 1st carbon of glucose and 2nd carbon of fructose, so both reducing groups are masked.
Description : Glucose and fructose will form identical osazones, why?
Last Answer : The difference in glucose and fructose is dependent on the first and second carbon atoms, and this is masked by the osazone formation.
Description : What is the difference between glucose and fructose?
Last Answer : Glucose is an aldohexose, and fructose is a ketohexose.
Last Answer : (A) Galactose
Description : A 19 year-old female is referred following a visit to the dentist where marked erosion of her teeth was noted. She was entirely asymptomatic and her only medication was the oral contraceptive pill ... ) Bulimia nervosa 2) Conn's syndrome 3) Laxative abuse 4) Pregnancy 5) Primary hypoparathyroidism
Last Answer : Answers-5 This patient has tooth erosion associated with hypokalaemic metabolic alkalosis and hypocalcaemia. This suggests a diagnosis of hypoparathyroidism. Conn's is unlikely in this age group, is ... raised alkaline phosphatase would not be expected. Early pregnancy would not fit this picture.
Description : A 15-year-old girl was seen by her family physician because of increasing lethargy. She had a recent history of the "flu". Biochemistry tests show that she has renal impairement. ... will likely develop a restrictive lung disease 5) She will probably improve with additional corticosteroid therapy
Last Answer : Answers-2 The findings point to focal segmental glomerulosclerosis (FSGS), which leads to chronic renal failure in half of cases. The lack of resolution with corticosteroid therapy and the progression to chronic renal failure is what sets FSGS apart from minimal change disease.