Biomolecules Test

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Biomolecules Test - 59

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Weekly Quiz Competition

Question 1
1 / -0

Invert sugar is:

A
a type of cane sugar

B
optically inactive form of sugar

C
mixture of glucose and galactose

D
mixture of glucose and fructose in equimolar quantities

Solution

Sucrose which is an equimolar mixture of glucose and fructose on hydrolysis brings about a change in the sign of rotation from dextro (+) to laevo (-) and the product is named as invert sugar.
Hence, invert sugar is a mixture of glucose and fructose in equimolar quantities.
Question 2
1 / -0

Vitamin C must be supplied regularly in diet because ?

A
it is water soluble hence excreted in urine and can't be stored in the body

B
it is fat soluble hence stored in the body and cannot be used on regular basis

C
it is required in a large amount by the body hence supplied regularly

D
it is water soluble hence used by the body on daily basis and is to be suppled regularly

Solution

Vitamin C must be consumed regularly in diet because it is water soluble and cannot be stored in body. It get flushed from our body, hence must be consumed daily.
Question 3
1 / -0

Bases common to RNA and DNA are?

A
adenine, guanine, cytosine

B
adenine, uracil, cytosine

C
adenine, guanine, thymine

D
guanine, uracil, thymine

Solution

The purines adenine (A) and guanine (G) and the pyrimidine cytosine (C) are commonly present in both DNA and RNA. The pyrimidine thymine (T) present in DNA is replaced by the pyrimidine uracil (U) in RNA.
Question 4
1 / -0

What is the basic formula for starch?

A
$${ \left( { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 } \right) }_{ n }$$

B
$${ \left( { C }_{ 6 }{ H }_{ 10 }{ O }_{ 5 } \right) }_{ n }$$

C
$${ \left( { C }_{ 12 }{ H }_{ 22 }{ O }_{ 11 } \right) }_{ }$$

D
$${ \left( { C }_{ 6 }{ H }_{ 12 }{ O }_{ 4 } \right) }_{ n }$$

Solution

Starch is a polysaccharide comprising glucose monomers joined in $$\alpha$$-1,4 linkages. The basic chemical formula of the starch molecule is $${\left( {C}_{6}{H}_{10}{O}_{5} \right)}_{n}$$.

Hence, option $$B$$ is correct.
Question 5
1 / -0

Which of the following is not true about amino acids?

A
They are constituents of all proteins

B
Alanine having one amino and one carboxylic group

C
Most naturally occurring amino acids have D-configuration

D
Glycine is the only naturally occurring amino acid which is optically inactive

Solution

All naturally occurring proteins from all living organisms consist of L amino acids. Most naturally occurring chiral amino acids are S, with the exception of cysteine.
Hence, C is not true.

Question 6

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Match the name of vitamins in column I with their sources in column II and mark the appropriate choice.

Column I	Column II
(A) Vitamin $${B}_{1}$$	(i) Milk, yeast, cereals
(B) Vitamin $${B}_{12}$$	(ii) Meat, fish, egg
(C) Vitamin A	(iii) Carrots, butter, papaya
(D) Vitamin C	(iv) Citrus fruits, amla, green leafy vegetables

(A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (i), (D) $$\rightarrow$$ (ii)

(A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (i), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

(A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (i)

(A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

Solution

Vitamin $$B_1$$ is mostly found in meat, fish, and poultry products

Vitamin $$B_{12}$$ is found in cereals, yeast, and most of the milk and milk products

Orange and Yellow vegetables are the major source of Vitamin A. Carrots, butter, papaya are the source of Vitamin A.

Vitamin C is found naturally in fruits(citrus fruits and their juices) and green leafy vegetables
A-ii, B-i, C-iii, D-iv
Option B is correct.

Question 7
1 / -0

Vitamin $${B}_{2}$$, a water soluble vitamin is also known as:

A
ascorbic acid

B
riboflavin

C
thiamine

D
pyridoxine

Solution

Vitamin $${B}_{2}$$ is the only water-soluble vitamin which is used as a food coloring known as riboflavin. It is named for its color — the Latin word flavus means “yellow.”
Question 8
1 / -0

Which is a fat-soluble vitamin?

A
Vitamin A

B
Vitamin $${B}_{6}$$

C
Vitamin C

D
Vitamin $${B}_{2}$$

Solution

A vitamin that can dissolve in fats and oils. Fat-soluble vitamins are absorbed along with fats in the diet and can be stored in the body's fatty tissue. They come from plant and animal foods or dietary supplements. Vitamins A, D, E, and K are fat-soluble.
Question 9
1 / -0

Consider the given compound and arrange X, Y, Z in order of increasing acid strengths?

A
X> Z> Y

B
Z> X> Y

C
X> Y> Z

D
Y> X> Z

Solution

$$-COOH\rightarrow $$ more gives acidic as it gives $$H^+$$ easily.

Near to $$X$$ there is $$Z$$ which is more acidic than $$Y$$ because of $$-I$$ effect decrease with distance.
Question 10
1 / -0

Which of the following acids is a vitamin?

A
Aspartic acid

B
Ascorbic acid

C
Adipic acid

D
Saccharic acid

Solution

Vitamin C, also known as ascorbic acid is a vitamin found in food and used as a dietary supplement.

Option B is correct.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 59

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Biomolecules Test - 59

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SHARING IS CARING

Question 1

a type of cane sugar

optically inactive form of sugar

mixture of glucose and galactose

mixture of glucose and fructose in equimolar quantities

Solution

Question 2

it is water soluble hence excreted in urine and can't be stored in the body

it is fat soluble hence stored in the body and cannot be used on regular basis

it is required in a large amount by the body hence supplied regularly

it is water soluble hence used by the body on daily basis and is to be suppled regularly

Solution

Question 3

adenine, guanine, cytosine

adenine, uracil, cytosine

adenine, guanine, thymine

guanine, uracil, thymine

Solution

Question 4

$${ \left( { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 } \right) }_{ n }$$

$${ \left( { C }_{ 6 }{ H }_{ 10 }{ O }_{ 5 } \right) }_{ n }$$

$${ \left( { C }_{ 12 }{ H }_{ 22 }{ O }_{ 11 } \right) }_{ }$$

$${ \left( { C }_{ 6 }{ H }_{ 12 }{ O }_{ 4 } \right) }_{ n }$$

Solution

Question 5

They are constituents of all proteins

Alanine having one amino and one carboxylic group

Most naturally occurring amino acids have D-configuration

Glycine is the only naturally occurring amino acid which is optically inactive

Solution

Question 6

(A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (i), (D) $$\rightarrow$$ (ii)

(A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (i), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

(A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (i)

(A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

Solution

Question 7

ascorbic acid

riboflavin

thiamine

pyridoxine

Solution

Question 8

Vitamin A

Vitamin $${B}_{6}$$

Vitamin C

Vitamin $${B}_{2}$$

Solution

Question 9

X> Z> Y

Z> X> Y

X> Y> Z

Y> X> Z

Solution

Question 10

Aspartic acid

Ascorbic acid

Adipic acid

Saccharic acid

Solution

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