Disaccharide

Q.

Lactose is made up of alpha or beta glucose?

Q.

1, 4 - β - glycosidic linkages are present in:

I) Starch II) Cellulose
III) Lactose IV) Maltose

1. I, III
2. I, IV
3. II, III
4. II

Q.

Inulin is a polymer of:

1. (a) Glucose

2. (b) Fructose

3. (c) Galactose

4. (d) Arabinose

Q.

In disaccharides, if the reducing groups of monosaccharides, i.e., aldehydic or ketonic groups are bonded, these are non-reducing sugars. Which of the following disaccharide is a non-reducing sugar?

Q.

β- D - Galactose is represented as

1. 

2. 

3. 

4. 

Q.

Which of the following is not the example of carbohydrate?

1. Fructose

2. Glucose

3. Glycine

4. Maltose

Q.

Lactose molecule is made up of β-d (-) galactopyranose and β-d (+) gluco pyraonose. The number of - OH groups present in it are

1. 10

2. 8

3. 6

4. 4

Q.

The two functional groups characteristic of sugars are:

1. Carbonyl and methyl

2. Carbonyl and phosphate

3. Carbonyl and hydroxyl

4. Hydroxyl and methyl

Q. On heating glucose with Fehling's solution we get a precipitate whose colour is

1. White
2. Black
3. Yellow
4. Red

Q.

Is glucose an oxidizing agent?

Q.

Regarding lactose, some statements are given below

A) On hydrolysis, lactose gives β-D-galactose and β-D-glucose

B) In lactose C₁ of β-D-galactose has acetal structure and C₁ of β-D-glucose has hemiacetal structure

C) In lactose molecule, β-D-galactose is a non-reducing unit and β-D-glucose is reducing unit

The correct statements are

1. B, C

2. A, C

3. A, B

4. A, B, C

Q.

Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called?

Q. Maltose consists of:

1. α-glucose and α-fructose
2. α-sucrose and β-glucose
3. α-glucose and α-glucose
4. β- glucose and β-galactose

Q.

$Glucose\stackrel{A{g}_{2}O}{\to }X$

$Glucose\stackrel{Conc.HN{O}_3}{\to }Y$

X. Y and X respectively are:

1. HOOC - (CHOH)₄ - CH₂OH, HOOC - (CHOH)₄ - CHO

2. HOOC - (CHOH)₄ - COOH, HOOC - (CHOH)₄ - CH₂OH

3. HOOC - (CHOH)₄ - CHO, HOOC - (CHOH)₄ - COOH

4. HOOC - (CHOH)₄ - CH₂OH, HOOC - (CHOH)₄ - COOH

Q.

Correct statements among the following is / are

A.D - Glucose and L - glucose are enantiomers

B.α- D - Glucose and β- D - Glucose are anomers

C.Glucose and fructose are functional group isomers

D.D - glucose has 2R, 3R, 4S, 5R configuration

1. A & B

2. A, B, C
3. A, C, D
4. A, B, C, D

Q. Glucose is oxidised by nitric acid and produce

1. sorbitol
2. saccharic acid
3. glucocyanohydrin
4. gluconic acid

Q.
On acid hydrolysis of above disaccharide, we get:

1. Two moles of glucose
2. One mole of glucose
3. One mole of glucose and one mole of galactose
4. One mole of galactose

Q.

1, 4 - β - glycosidic linkages are present in:

I) Starch II) Cellulose
III) Lactose IV) Maltose

1. I, III
2. I, IV
3. II, III
4. II

Q. Which of the following is the structure of D-xylose?

1. 
2. 
3. 
4. 

Q.

$Glucose\stackrel{A{g}_{2}O}{\to }X$

$Glucose\stackrel{Conc.HN{O}_3}{\to }Y$

X. Y and X respectively are:

1. HOOC - (CHOH)₄ - CH₂OH, HOOC - (CHOH)₄ - CHO

2. HOOC - (CHOH)₄ - COOH, HOOC - (CHOH)₄ - CH₂OH

3. HOOC - (CHOH)₄ - CHO, HOOC - (CHOH)₄ - COOH

4. HOOC - (CHOH)₄ - CH₂OH, HOOC - (CHOH)₄ - COOH

Q. An example of disaccharide, made up of two units of the same monosaccharide, is:

1. maltose
2. sucrose
3. lactose
4. none

Q. Which of the following is not a disaccharide?

1. Lactose
2. Cane sugar
3. Maltose
4. Raffinose

Q. Identify the product(s) in the following reaction:

1. All of these
2. $C{H}_{3}COOH$
3. $C{H}_{3}C{H}_{2}C{H}_{2}COOH$
4. $C{H}_{3}C{H}_{2}COOH$

Q. Match the following.

List-I	List-II (Monomer)
A) Sucrose	i) $\beta$-D-Galactose and $\beta$-D-Glucose
B) Cellulose	ii) $\alpha$-D-Glucose and $\beta$-D-Fructose
C) Starch	iii) $\beta$-D-Glucose
D) Lactose	iv) $\alpha$-D-Glucose

1. A-ii; B-i; C-iii; D-iv
2. A-i; B-ii; C-iii; D-iv
3. A-ii; B-iii; C-iv; D-i
4. A-iv; B-iii; C-i; D-ii

Q. Which reagent gives saccharic acid by reacting with glucose?

1. Fehling solution
2. $B{r}_2$ water
3. $HN{O}_3$
4. $N{H}_{2}OH$

Q. Same osazone derivative is obtained in case of D-glucose, D-mannose and D-fructose, due to:

1. the same configuration at C-5
2. the same constitution.
3. the same constitution at C-1 and C-2
4. the same constitution and same configuration at C-3, C-4, C-5 and C-6, but different constitution and configuration at C-1 and C-2, which becomes identical after osazone formation.

Q.

β- D - Galactose is represented as

1. 

2. 

3. 

4. 

Q. Maltose consists of:

1. $\beta -$ glucose and $\beta -$ galactose
2. $\alpha -$glucose and $\alpha -$fructose
3. $\alpha -$sucrose and $\beta -$glucose
4. $\alpha -$glucose and $\alpha -$glucose

Q. Which of the following is the sweetest sugar?

1. Glucose
2. Lactose
3. Fructose
4. Sucrose

Q. Identify disaccharides among the following:

1. $a,b$
   
2. $d,e$
3. $b,e$
4. $b,c$