Biomolecules Test

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Biomolecules Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

The best source of vitamin A is:

A
oranges

B
beans

C
carrots

D
wheat

Solution

The best source of vitamin $$A$$ is carrots. Other sources are milk, eggs, fortified cereals, cod liver oil, red peppers, darkly colored orange or green vegetables (such as carrots, sweet potatoes, pumpkin, and kale).

Option C is correct.
Question 2
1 / -0

Enzymes are different from inorganic catalysts in

A
Not being used up in reactions.

B
Being proteinaceous in nature.

C
Having high diffusion rate.

D
Working at high temperature.

Solution

Biochemically, enzymes are polymers of amino acids. They are not amino acids but are polymers of amino acids. Most of the enzymes barring a few exceptions are proteins. Few non-proteinaceous enzymes are catalytic RNAs.
Question 3
1 / -0

An enzyme can be synthesised by chemically bonding together molecules of

A
Carbohydrates

B
Amino acids

C
Lipases

D
CO$$_{2}$$

Solution

Biochemically enzymes are polymers of amino acids. Most of the enzymes, barring a few exceptions, are proteins. Few non-proteinaceous enzymes are catalytic RNAs.
Question 4
1 / -0

K$$_m$$ is related to

A
Morphology

B
ABO blood group

C
ES complex

D
Chromatography

Solution

A constant indicating the substrate concentration at which an enzyme catalysed reaction attains half its maximum velocity or 1/2 V$$_{max}$$ is known as Michaelis-Menten Constant or K$$_m$$. Thus, K$$_m$$ is related to enzyme kinetics.
Question 5
1 / -0

What is the generic name of riboflavin?

A
Vitamin $$B_{1}$$

B
Vitamin $$B_{2}$$

C
Vitamin $$B_{6}$$

D
Vitamin $$B_3$$

Solution

Generic name of riboflavin is vitamin $$B_{2}$$.

Riboflavin is used in combination with other $$B$$ vitamins in vitamin $$B$$ complex products.

It is also used for treating riboflavin deficiency, acne, muscle cramps, burning feet syndrome, carpal tunnel syndrome and blood disorders.

Some people use riboflavin for eye conditions including eye fatigue, cataracts, and glaucoma.

Option B is correct.
Question 6
1 / -0

In plants, enzymes are present

A
Only in flowers

B
Only in leaves

C
In all the living cells of plant body

D
Only in parenchyma

Solution

Enzymes are biocatalyst. These are proteinaceous substances that are capable of catalysing chemical reactions of biological systems without themselves undergoing any change. They are produced in all living cells. No life process can be carried out successfully in absence of enzymes.
Question 7
1 / -0

The enzymes act between the temperature range of

A
35- 40 degrees

B
30- 35 degrees

C
40- 45 degrees

D
50 degrees and above

Solution

Enzymes are biological catalysts which accelerate chemical reactions in organisms. Optimum temperature is the temperature at which enzyme activity is maximum. In humans, this temperature is 37.5$$^o$$C that is same as the normal body temperature. A rise in temperature above 40$$^o$$C results in denaturation of the proteins of enzyme. Thus the correct answer is option A.
Question 8
1 / -0

Amino acids are building blocks of:

A
carbohydrates

B
proteins

C
vitamins

D
fats

Solution

$$\alpha$$-amino acids are the monomers which on polymerization gives protein as a polymer.
Thus, they are the basic building block of the proteins.
Question 9
1 / -0

Which of the following is not a coenzyme?

A
NAD

B
NADP

C
FAD

D
ATP

Solution

Many enzymes consists of a protein and non-protein component, they are called as holoenzymes. The protein component of a holoenzyme is called as apoenzyme and the non-protein component may be inorganic ions such as Mg$$^{2+}$$ and Mn$$^{2+}$$. They are tightly attached to apoenzyme, they are called as activators. The non-protein components may be organic substances such as NAD+, NADP+ and FAD+. They are loosely attached to the apoenzyme. They are called coenzyme or cofactors.
Question 10
1 / -0

Which enzyme converts glucose to ethanol?

A
Diesterase

B
Invertase

C
Zymase

D
Both (2) and (3)

Solution

$$Glucose\underrightarrow { Zymase } Ethanal$$
Zymase converts glucose to ethanal

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 25

Result

Biomolecules Test - 25

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SHARING IS CARING

Question 1

oranges

beans

carrots

wheat

Solution

Question 2

Not being used up in reactions.

Being proteinaceous in nature.

Having high diffusion rate.

Working at high temperature.

Solution

Question 3

Carbohydrates

Amino acids

Lipases

CO$$_{2}$$

Solution

Question 4

Morphology

ABO blood group

ES complex

Chromatography

Solution

Question 5

Vitamin $$B_{1}$$

Vitamin $$B_{2}$$

Vitamin $$B_{6}$$

Vitamin $$B_3$$

Solution

Question 6

Only in flowers

Only in leaves

In all the living cells of plant body

Only in parenchyma

Solution

Question 7

35- 40 degrees

30- 35 degrees

40- 45 degrees

50 degrees and above

Solution

Question 8

carbohydrates

proteins

vitamins

fats

Solution

Question 9

NAD

NADP

FAD

ATP

Solution

Question 10

Diesterase

Invertase

Zymase

Both (2) and (3)

Solution

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