Biomolecules Test

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Biomolecules Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

Raffinose on hydrolysis forms_________

A
Glucose

B
Fructose

C
Galactose

D
All of these

Solution

Raffinose is a trisaccharide and consists of 1 unit of glucose, fructose and galactose each.

So on hydrolysis, it breaks into glucose, fructose and galactose.

So, D is correct.
Question 2
1 / -0

The sugar and purine rings are connected at which carbons?

A
$$1, 3$$

B
$$1, 6$$

C
$$1 , 9$$

D
$$5 , 9$$

Solution

The sugar and purine rings are connected at 1,6 position of carbon.
Question 3
1 / -0

The commonest disaccharide has the molecular formula______

A
$$C_{10}H_{18}O_{19}$$

B
$$C_{10}H_{20}O_{10}$$

C
$$C_{11}H_{22}O_{11}$$

D
$$C _{12}H_{22}O_{11}$$

Solution

Disaccharides are the carbohydrates which on hydrolysis gives two same or different carbohydrates.

Sucrose is the most common disaccharide.

It can be found in many fruits and is naturally occuring.

It has molecular formula $$C_{12}H_{22}O_{11}$$.

Option D is correct.
Question 4
1 / -0

Which of the following group/linkage is absent in adenine but present in guanine?

A
$$C-N$$

B
$$-NH_{2}$$

C
$$C=O$$

D
$$-CONH_{2}$$

Solution

The -C=O link is present in guanine but is not present in adenine.
So, C is correct.

Question 5

1 / -0

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

A-i; B-ii; C-iii; D-iv

A-ii; B-i; C-iii; D-iv

A-ii; B-iii; C-iv; D-i

A-iv; B-iii; C-i; D-ii

Solution

Sucrose is made up of two monomers $$\alpha$$-D-Glucose and $$\beta$$-D-Fructose.
Cellulose is made up of $$\beta$$ -D-Glucose.
Starch is made up of $$\alpha$$-D-Glucose.
Lactose is made up of two monomers $$\beta$$-D-Galactose and $$\beta$$-D-Glucose.

Question 6
1 / -0

Starch is converted into disaccharide in
presence of

A
Diastase

B
Maltose

C
Zymose

D
Lactose

Solution

In the presence of diastase, starch breaks down to maltose. Maltose is a disaccharide consisting of 2 glucose units. So, A is correct.
Question 7
1 / -0

Starch is used to test even the small amounts of:

A
sucrose in aqueous solution

B
glucose in aqueous solution

C
$$I_{2}$$ in aqueous solution

D
maltose in aqueous solution

Solution

Starch is used to test even the small amounts of glucose in aqueous solution. The glucose solution will turn violet in presence of starch.
Question 8
1 / -0

Combination of proteins with nucleic acids give

A
enzymes

B
polypeptides

C
nucleo proteins

D
dipeptides

Solution

Combination of proteins with nucleic acids gives nucleoproteins. Nucleic acids are the prosthetic group present in nucleoproteins. Nucleoproteins are proteins of cell nuclei and are main component of chromatin. They are present in every living cell a well as in virus and baceteria. Example -protamines, histones.
Question 9
1 / -0

Which of the following is/are pyrimidine derivatives?
1.Cytosine 2. Adenine 3. Uracil 4. Thymine

A
1 and 4 only

B
2 and 3 only

C
1 and 3 only

D
1, 3 and 4 only

Solution

Purine derivatives are adenine and guanine.

Pyrimidine derivatives are cytosine, thymine and uracil.

So, D is the correct answer.
Question 10
1 / -0

Which one of the following statements about starch is correct?

A
It occurs in the cell walls of plants

B
It is a disaccharide

C
It is present in roots and seeds of plants

D
It gives a red orange precipitate on boiling with Fehlings solution

Solution

Starch is the polysaccharide which is present in roots and seeds of plants. It is present in all photosynthesis plants. It is present is seeds in form of granules.

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Biomolecules Test - 35

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Biomolecules Test - 35

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Question 1

Glucose

Fructose

Galactose

All of these

Solution

Question 2

$$1, 3$$

$$1, 6$$

$$1 , 9$$

$$5 , 9$$

Solution

Question 3

$$C_{10}H_{18}O_{19}$$

$$C_{10}H_{20}O_{10}$$

$$C_{11}H_{22}O_{11}$$

$$C _{12}H_{22}O_{11}$$

Solution

Question 4

$$C-N$$

$$-NH_{2}$$

$$C=O$$

$$-CONH_{2}$$

Solution

Question 5

A-i; B-ii; C-iii; D-iv

A-ii; B-i; C-iii; D-iv

A-ii; B-iii; C-iv; D-i

A-iv; B-iii; C-i; D-ii

Solution

Question 6

Diastase

Maltose

Zymose

Lactose

Solution

Question 7

sucrose in aqueous solution

glucose in aqueous solution

$$I_{2}$$ in aqueous solution

maltose in aqueous solution

Solution

Question 8

enzymes

polypeptides

nucleo proteins

dipeptides

Solution

Question 9

1 and 4 only

2 and 3 only

1 and 3 only

1, 3 and 4 only

Solution

Question 10

It occurs in the cell walls of plants

It is a disaccharide

It is present in roots and seeds of plants

It gives a red orange precipitate on boiling with Fehlings solution

Solution

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