InterviewSolution

Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

51.	Which of the following is true?(a) Xylose is stereo chemically similar to glucose but one carbon shorter(b) Xylose binds to hexokinase in a position where it can be phosphorylated(c) Addition of xylose increases the rate of ATP hydrolysis(d) The binding of xylose is sufficient to induce a change in hexokinase to its active conformationI got this question during an interview.I'd like to ask this question from Examples Of Enzymatic actions in portion Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» The CORRECT option is (b) Xylose BINDS to hexokinase in a POSITION where it can be phosphorylated To ELABORATE: Xylose binds to hexokinase at a position where it cannot be phosphorylated.

52.	Which of the following is true about the structure of hexokinase?(a) U-shaped(b) T-shaped(c) E-shaped(d) G-shapedThe question was asked in exam.I'd like to ask this question from Examples Of Enzymatic actions in division Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» CORRECT ANSWER is (a) U-shaped The EXPLANATION is: HEXOKINASE has a U-shaped STRUCTURE.

53.	Which of the following are the storage polysaccharides?(a) Glycogen(b) Cellulose(c) Chitin(d) GlucoseI had been asked this question during a job interview.I would like to ask this question from Polysaccharides in division Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» Correct choice is (a) GLYCOGEN Explanation: Starch and glycogen are KNOWN as STORAGE POLYSACCHARIDES.

54.	What is the chemical difference between cellulose and chitin?(a) Replacement of the hydroxyl group at C2 with an acetylated amino group(b) Replacement of the hydroxyl group at C3 with an acetylated amino group(c) Replacement of the hydroxyl group at C4 with an acetylated amino group(d) Replacement of the hydroxyl group at C5 with an acetylated amino groupI had been asked this question during an online interview.Asked question is from Polysaccharides in portion Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» Correct choice is (a) REPLACEMENT of the hydroxyl GROUP at C2 with an acetylated amino group For explanation: Chitin is a linear homopolysaccharide composed of N-acetylglucosamine RESIDUES in β linkage.

55.	In the case of allosteric enzymes what is the graphical representation when initial velocity is plotted against substrate concentration?(a) Straight line with negative slope(b) Hyperbola(c) Sigmoid curve(d) ParabolaThe question was posed to me during an online exam.Question is taken from Regulatory Enzymes in section Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» The CORRECT choice is (c) Sigmoid curve For explanation I WOULD say: Allosteric ENZYMES do not OBEY Michaelis-Menten kinetics. So the curve is not hyperbolic.

56.	Which of the following is false?(a) Methyl, phosphoryl, adenyl, uridylyl and adenosine diphosphate ribosyl groups are the modifying groups(b) An example of an enzyme regulated by methylation is the methyl-donating chemo taxis protein of bacteria(c) The protein is a part of the system that permits a bacterium to swim towards attractant(d) The methylating agent is S- adenosylmethionineI got this question during an online interview.This intriguing question originated from Regulatory Enzymes in portion Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» The correct ANSWER is (b) An example of an ENZYME regulated by METHYLATION is the methyl-donating CHEMO TAXIS protein of bacteria The explanation is: An example of an enzyme regulated by methylation is the methyl-accepting chemo taxis protein of bacteria.

57.	Which of the following is false about allosteric feedback inhibition?(a) Bacterial enzyme system is the first known example(b) Conversion of L-leucine to L-isoleucine(c) Threonine dehydratase is inhibited by isoleucine(d) If the isoleucine concentration decreases, the rate of threonine dehydration increasesThis question was addressed to me in examination.Enquiry is from Regulatory Enzymes topic in division Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» The correct answer is (b) Conversion of L-leucine to L-isoleucine Easy explanation: The BACTERIAL enzyme system that CATALYSES L-threonine to L-isoleucine are the first known example of allosteric FEEDBACK INHIBITION.

58.	The protein core of proteoglycan is rich in ___________(a) Serine and threonine(b) Serine and methionine(c) Threonine and methionine(d) Alanine and serineI have been asked this question during a job interview.Origin of the question is Glycoconjugates: Proteoglycans, Glycoproteins and Glycolipids topic in section Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» CORRECT CHOICE is (a) SERINE and threonine For EXPLANATION: NONE.

59.	Which of the following are found in connective tissues?(a) Glycosaminoglycans(b) Proteoglycans(c) Glycoproteins(d) GlycolipidsThe question was asked during an interview.Question is from Glycoconjugates: Proteoglycans, Glycoproteins and Glycolipids topic in chapter Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» Correct CHOICE is (b) Proteoglycans To explain: Proteoglycans are found in all connective tissues, extracellular MATRIX and on the surface of MANY cell SURFACES.

60.	Which of the following is an example of disaccharide?(a) Glucose(b) Fructose(c) Galactose(d) MaltoseThis question was addressed to me in class test.This key question is from Monosaccharides and Disaccharides in section Enzymes, Carbohydrates and Gycobiology of Biochemistry
Answer» RIGHT choice is (d) Maltose The EXPLANATION: Maltose is a disaccharide with TWO monosaccharide GLUCOSE units.