Biomolecules Test

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Biomolecules Test - 41

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Question 1
1 / -0

The ratio of the enzyme to substrate molecule can be as high as ___________.

A
1 : 1000

B
1 : 1,00,000

C
1 : 10,00,000

D
1 : 50,000

Solution

The enzyme attaches to the active site of the substrate. On attachment to the active site, the substrate is changed into the product. The active site has a residue that helps in the attachment of the substrate. The substrate molecules form a temporary bond with the enzyme at the active site. The ratio of enzyme to substrate molecules can be as high as 1 : 10,00,000. If the amount of substrate increases more than this, it will not get the vacant active site for attachment which terminates the reaction.
So, the correct answer is option C.
Question 2
1 / -0

Which is correct statement?

A
Starch is polymer of $$\alpha$$-glucose.

B
Amylose is a component of cellulose.

C
Proteins are composed of only one type of amino acid.

D
In cyclic structure of fructose, there are four carbons and one oxygen atom.
Solution
- Starch is a polymer of $$\alpha-D-Glucose$$, it is a branched structure that has $$1,4$$ and $$1.6$$ glycosidic bond.
- Starch is homopolysaccharide.
Question 3
1 / -0

Enzymes are found in all living cells. Their main function is

A
To help in the digestion of food

B
To allow chemical reaction to food

C
To speed up the breakdown of substance

D
To accelerate the rate of chemical reactions

E
To help in making new compounds

Solution

Enzymes are biocatalyst produced by living cells that is capable of speeding up specific chemical reaction.
Question 4
1 / -0

Which of the following enzyme was first isolated and purified in the form of crystals __________.

A
Amylase

B
Urease

C
Ribonuclease

D
Pepsin

Solution

In 1897, Eduard Buchner discovered that yeast extracts could ferment sugar to alcohol, proving that fermentation was promoted by molecules that continued to function when removed from cells. Frederick W. Kuhne called these molecules like enzymes. The isolation and crystallization of urease by James Sumner, in 1926, provided a breakthrough in early enzyme studies.
Sumner found that urease crystals consisted entirely of protein, and he postulated that all enzymes are proteins. In the absence of other examples, this idea remained controversial for some time.
Only in the 1930s, was Sumners conclusion widely accepted, after John Northrop and Moses Kunitz crystallized pepsin, trypsin, and other digestive enzymes and found them also to be proteins.
Question 5
1 / -0

Most of the biochemical reactions differ from those occurring in the non-living world in ________________.

A
Requiring energy

B
Releasing energy

C
Being enzymatic

D
Being spontaneous

Solution

C. Being enzymatic
Solution : Most of the biochemical reactions are enzymatic in nature unlike the chemical reactions in the nature that either release or require energy without catalysts.
So the correct answer is " Being enzymatic".
Question 6
1 / -0

Which of the following is not a fat soluble vitamin?

A
Vitamin A

B
Vitamin B complex

C
Vitamin D

D
Vitamin E

Solution

Fat-soluble vitamins are those which are similar to oil and they do not dissolve in water. Vitamin A, D, E, K are the fat soluble vitamins. Vitamin B complex is not a fat soluble vitamin because it is water soluble. It is a pack of all eight vitamins i.e vitamin B1, B2, B3, B5, B6, B7, B9 and B12. As it is water soluble our body doesn't store it and hence body must be served daily with vitamin B complex.
Question 7
1 / -0

Role of carbohydrates is to function as

A
Catalyst

B
Source of energy

C
Enzyme

D
Building material

Solution

Carbohydrates are more suitable for the production of energy in the body then proteins and fats. Carbohydrate are also stored in the body cells as glycogen and are used for the production of energy whenever required.
Question 8
1 / -0

Sugar obtained from sugarcane and sugarbeet is

A
Glucose

B
Fructose

C
Galactose

D
Sucrose

Solution

A typical sugar beetroot consists of 75.9% water, 2.6% non-sugars, 18.0% sugar and 5.5% pulp. In the sugar fraction, 83.1% is recovered as crystalline sucrose, 12.5% is recovered as molasses.
So the correct option is D.
Question 9
1 / -0

Cereals are major sources of?

A
Carbohydrates

B
Proteins

C
Fats

D
Vitamins

Solution

Cereals are a staple food and are an important source of energy, carbohydrates, protein, and fibre. Examples of cereals include wheat, oats, quinoa, maize, sorghum, etc.
So, the correct answer is 'Carbohydrates'
Question 10
1 / -0

$$6H_{2}O + 6CO_{2}\frac{sunlight} {Chlorophyll}$$ ?

A
$$C_{6}H_{12}O_{6} + 6O_{2}$$

B
$$C_{6}H_{6}O_{6} + 8O_{2}$$

C
$$C_{5}H_{12}O_{17} + CO_{2}$$

D
$$C_{6}H_{11}O_{17} + H_{2}O$$

Solution

It is the reaction of photosynthesis, that converts light energy into chemical energy as glucose that gives $$ATP$$ after oxidation.
$$6CO_2 + 6H_2O \overset{Sunlight}\longrightarrow C_6H_{12}O_6 + 6O_2$$

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Biomolecules Test - 41

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Biomolecules Test - 41

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Question 1

1 : 1000

1 : 1,00,000

1 : 10,00,000

1 : 50,000

Solution

Question 2

Starch is polymer of $$\alpha$$-glucose.

Amylose is a component of cellulose.

Proteins are composed of only one type of amino acid.

In cyclic structure of fructose, there are four carbons and one oxygen atom.

Solution

Question 3

To help in the digestion of food

To allow chemical reaction to food

To speed up the breakdown of substance

To accelerate the rate of chemical reactions

To help in making new compounds

Solution

Question 4

Amylase

Urease

Ribonuclease

Pepsin

Solution

Question 5

Requiring energy

Releasing energy

Being enzymatic

Being spontaneous

Solution

Question 6

Vitamin A

Vitamin B complex

Vitamin D

Vitamin E

Solution

Question 7

Catalyst

Source of energy

Enzyme

Building material

Solution

Question 8

Glucose

Fructose

Galactose

Sucrose

Solution

Question 9

Carbohydrates

Proteins

Fats

Vitamins

Solution

Question 10

$$C_{6}H_{12}O_{6} + 6O_{2}$$

$$C_{6}H_{6}O_{6} + 8O_{2}$$

$$C_{5}H_{12}O_{17} + CO_{2}$$

$$C_{6}H_{11}O_{17} + H_{2}O$$

Solution

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