BIO202 Final Term Past Papers 2022 by Asmat Niazi

Crystalline derivatives of monosaccharide, formed from pheny hydrazine are known as… a. Cake c. sugar b. d. glucose Simplest carbohydrate is…. a. Glucose c. glycerine b. sucrose In Benedict`stest the…..are produced which form red precipitate a. Ferric ions c. b. cupric ions d. ferrous ions Monosaccharides can be subdivided further depending upon… a. Aldehyde groups b. number of carbon atoms c. none of given If the carbonyl group is at an end of carbon chain (that is in a….) the monosaccharides is an aldose. a. carboxyl group b. carbonyl group d. ketone group

The terminal methyl and…..carbon of glucose, galactose, or mannose-forms the corresponding aldaric acid. a. Ketone c. carboxyl b. d. aldehyde Carbohydrates are polyhydroxy….or substances that yield such compounds on hydrolysis. a. Ketones c. aldehydes b. all of given …..is commonly found in fruit juices, personal lubricants, and wine and is used to create tangy taste in food. a. Glucose c. salt b. honey ….is semi-quantitative test to detect presence of glucose in a solution a. ninhydrin test b. molisch`s test d. none of given In the open chain form of carbohydrates one of carbon atoms is double-bonded to an oxygen atom to form a…. a. c. carboxtl group b. ketone group d. aldehyde group Both glycogen and cellulose are made up of glucose subunits, however while glycogen is…., cellulose exists in the form of… a. Disaccharide, polysaccharide c. linear chains, branched b. polysaccharide, disaccharide d.

The designation of a sugar isomer as the D form or as the L form is determined by its spatial relationship to parent compound of carbohydrates which is….. a. Glucose c. b. glycogen d. glycerol

With reference to carbohydrate structure, which type of isomers has nearly identical chemical properties but differ in their interaction with plane-polarized light?

a. Anomers c. b. aldose-ketose isomerism d. epimers

Isomeric forms of monosaccharide that differ only in their configuration about hemiacetal or hemiketal carbon atom are called…. a. Epimers c. b. stereoisomers d. enantiomers

Among six membered cyclic carbohydrates, the….is much more stable than the aldofuranose ring. a. ketofuranose ring b. ketopyranose ring d. aldopentose ring

Sugars are classified on the basis of number of carbon atoms present. An example of a tetrose is: a. c. ribose b. glucose d. glyceraldehyde All of following statements about glucose are correct except: a. It is the precursor for all other carbohydrates in body b. it is chief physiological sugar present in normal blood at a fairly constant level c. it is present in fruit juices d. Glucose is excreted in urine in poorly controlled diabetes mellitus as a result of hyperglycemia. This medical condition is known as: a. glyceraldehyde 3 dehydrogenase deficiency c. Hypoglycemia b. hyperinsulinism Glucose and galactose are epimers which differ in configuration around carbon no. ….. a. c. 6 b. 2

The oxidation of carbonyl carbon in monosaccharide yield products known as: a. uronic acids b. furfurals d. aldoses ….is a levorotatory sugar and also known as levulose. a. Galactose c. mannose b. d. glucose Different sugars are utilized in various ways in human body and hence occur in varying amounts in body fluids, which fluid is rich in fructose? a. blood b. cerebrospinal fluid d. tissue fluid The oxidation of monosaccharide results in production of either aldonic acids or uronic acids depending on the carbon atoms oxidized. Both aldonic and uronic acids form stable intramolecular ester that are known as…. a. furfurals b. carboxylates d. aldoses The condition in which the body fails to metabolize galactose is known as: Hypoglycemia c. diabetes mellitus glucosuria d.

glucone delta-lactone (GDL) is a type of lactone, commonly found in honey, fruit juices, personal lubricants, and wine. It hydrolysis in water to form…..which has a….. PH a. glucurenic acid, acidic c. glucose, neutral b. glyceraldehyde, neutral glucuronide is a soluble, non-toxic compound that is excreted in urine. It is produced when….forms conjugates with toxic substances including drugs, hormones and bilirubin. Gluconic acid c. glucose glyceraldehyde d.

Carbohydrates are detected in laboratory based upon certain properties. Benedict`s test is routinely used to check for presence of…. a. Aldopentoses c. b. ketohexoses d. polysaccharides

In synthesis and metabolism of carbohydrates, the intermediates are very often not sugars themselves but their….derivatives. a. carboxylates c. b. oxidized d. methylated

Amino sugars are formed when hydroxyl group in sugar is replaced with an amino group. An amino sugar that is a constituent of chondroitin is…. a. c. D-mannosamine b. D-glucoasmine Many antibiotics, like erythromycin, contain sugar derivatives such as…..those are important for their antibiotic activity….