Biomolecules Test

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Biomolecules Test - 30

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a sugar?

A
Sucrose

B
Glucose

C
Fructose

D
Cellulose

Solution

Monosaccharides and disaccharides are generally considered as sugar, which is a term for soluble carbohydrates. Cellulose, being long and a polymer of saccharides is not soluble in humans, and is, therefore, not considered as a sugar.

Cellulose is also polysaccharide and amorphous. Thus it is tasteless and non-sugar.
Question 2
1 / -0

Which of the following carbohydrates is not a monosaccharide?

A
Glucose

B
Fructose

C
Galactose

D
Sucrose
Solution
- Sugars are categorized into monosaccharides or disaccharides.
- Monosaccharides are made up of one single unit of sugar and thus cannot be hydrolyzed further into simpler compounds. Examples:- galactose, glucose, and fructose.
- These are the building blocks of other carbohydrates like disaccharides and polysaccharides.
- Disaccharides are made up of two monosaccharides linked by glycosidic linkage and will be again broken back down into the latter during digestion
- Sucrose is the scientific name for table sugar and is a disaccharide.
So the correct answer is option D.
Question 3
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Carbohydrates containing more than $$10$$ simple units of sugar are called:

A
Monosaccharides

B
Disaccharides

C
Trisaccharides

D
Polysaccharides

Solution

Oligosaccharide gives three to ten (3-10) molecules of monosaccharides on hydrolysis.

Polysaccharides gives a large number of molecules of monosaccharides on hydrolysis.

Hence, the correct option is $$\text{D.}$$
Question 4
1 / -0

A dextrorotatory sugar, present in fruits, is:

A
glucose

B
fructose

C
cellulose

D
starch

Solution

The natural glucose obtained from fruits is dextrorotatory in nature (this is the reason it is called (+) glucose).

Fructose is ketohexose which occurs in sweet fruits.
Question 5
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Glucose is a/an:

A
oxidising sugar

B
reducing sugar

C
both reducing and oxidising sugar

D
none of the above

Solution

Glucose is an aldose, which means that its open-chain form contains an aldehyde group. Aldehydes are quite easily oxidized to carboxylic acids. So a mild oxidizing agent will be reduced by glucose.
Question 6
1 / -0

Which of the following is not a monosaccharide?

A
Glucose

B
Fructose

C
Glyceraldehyde

D
Sucrose

Solution

Sucrose consists of a glucose and a galactose unit. So, it is a disaccharide and not a monosaccharide.
Question 7
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Which carbohydrate is used in silvering of mirrors ?

A
Fructose

B
Glucose

C
Sucrose

D
Starch

Solution

Silvering is the chemical process of coating glass with a reflective substance. In this process glucose is used to reduce the silver into silver nitrate when it is added on to the mirror.
Question 8
1 / -0

A mixture of $$\alpha$$-amino acids is obtained when proteins are hydrolysed by:

A
acids

B
bases

C
enzymes

D
all of the above

Solution

A mixture of $$\alpha$$-amino acids is obtained when proteins are hydrolysed by acids, bases and enzymes. Proteins are hydrolysed and broken down into its component amino acids. While there are many means of achieving this, two of the most common are prolonged boiling in a strong acid or strong base or using an enzyme such as the pancreatic protease enzyme to simulate the naturally occurring hydrolytic process.
Question 9
1 / -0

The simplest carbohydrate is:

A
dihydroxyacetone

B
formaldehyde

C
glucose

D
sucrose

Solution
Question 10
1 / -0

Which one of the following is $$\alpha$$-amino acid?

A
$$NH_{2}-C_{6}H_{5}-CH-CH_{2}-COOH$$

B
$$NH_{2}-CH_{2}-CH_{2}-CH_{2}-CH_{2}-COOH$$

C
$$NH_{2}-CH_{2}-COOH$$

D
$$NH_{2}-C_{6}H_{5}-CH-CH_{2}-CH_{2}-COOH$$

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Biomolecules Test - 30

Result

Biomolecules Test - 30

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SHARING IS CARING

Question 1

Sucrose

Glucose

Fructose

Cellulose

Solution

Question 2

Glucose

Fructose

Galactose

Sucrose

Solution

Question 3

Monosaccharides

Disaccharides

Trisaccharides

Polysaccharides

Solution

Question 4

glucose

fructose

cellulose

starch

Solution

Question 5

oxidising sugar

reducing sugar

both reducing and oxidising sugar

none of the above

Solution

Question 6

Glucose

Fructose

Glyceraldehyde

Sucrose

Solution

Question 7

Fructose

Glucose

Sucrose

Starch

Solution

Question 8

acids

bases

enzymes

all of the above

Solution

Question 9

dihydroxyacetone

formaldehyde

glucose

sucrose

Solution

Question 10

$$NH_{2}-C_{6}H_{5}-CH-CH_{2}-COOH$$

$$NH_{2}-CH_{2}-CH_{2}-CH_{2}-CH_{2}-COOH$$

$$NH_{2}-CH_{2}-COOH$$

$$NH_{2}-C_{6}H_{5}-CH-CH_{2}-CH_{2}-COOH$$

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