Biomolecules Test

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Biomolecules Test - 74

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Weekly Quiz Competition

Question 1
1 / -0

Who discovered that the infective part of virus is nucleic acids?

A
De Herelle

B
Hershey and Chase

C
Stanley

D
Lederberg and Tatum
Question 2
1 / -0

Which one of the following enzymes is added in many detergents that help of remove proteinaceous stains from clothes?

A
Alcalase

B
Xylanase

C
Peroxidase

D
Catalase
Question 3
1 / -0

Consider the following compounds.
a. Pyridoxal phosphate
b. Tetrahydrofolate
c. Thiamine pyrophosphate
d. Lipoid acid
Which of the above belong to the coenzymes of Pyruvate dehydrogenase complex?

A
$$1$$ only

B
$$2$$ only

C
Both $$1$$ and $$2$$

D
Neither $$1$$ nor $$2$$
Question 4
1 / -0

$${Q}_{10}$$ value for enzyme is generally found to be____________.

A
$$1$$

B
$$2$$

C
$$4$$

D
$$5$$
Question 5
1 / -0

Which of the following statement is correct?

A
Acetophenone is an ether

B
Diastase is an enzyme

C
Cycloheptane is aromatic

D
All of the above

Solution

Acetophenone $$ \displaystyle (C_6H_5- \underset { \displaystyle { \underset { \displaystyle \text { O } }{ || } } }{C }-CH_3)$$ is a ketone.

Diastase is an enzyme that hydrolyses starch into maltose.

Cycloheptane is non-aromatic.

Option (B) is the correct statement.
Question 6
1 / -0

Which one of the following statement is incorrect about enzyme catalysis?

A
Enzymes are mostly proteinous in nature

B
Enzymes are least reactive at optimum temperature

C
Enzymes are denaturated by ultraviolet rays and at high temperature

D
Enzyme action is specific

Solution

Enzymes are most reactive at optimum temperature. The physiological temperature ($$37^o C$$) is the optimum temperature for most enzymes.
Question 7
1 / -0

Which of the following is not pyrimidine N-base?

A
Uracil

B
Thyamine

C
Adenine

D
Cytosine

Solution

A molecule that contains nitrogen and has the chemical properties of a base is called nitrogenous bases. There are two major types of nitrogenous bases that are the purine and the pyrimidine. Among them adenine and guanine is a purine base whereas cytosine and thymine or uracil is a pyrimidine base. So,adenine is a compound which is one of the four constituent bases of nucleic acids. It is a purine derivative, it is paired with thymine in double stranded DNA.
So, the correct option is (C).
Question 8
1 / -0

Glucose, galactose and fructose all have the same molecular size and composition, and their absorption through the mucosal cells takes place ______________.

A
At the same rate

B
Glucose is absorbed most rapidly

C
Fructose is absorbed most rapidly

D
Galactose is absorbed most rapidly

Solution

Carbohydrates are broken down and absorbed in the form of monosaccharides. Various kinds of monosaccharides are absorbed at different rates the rate of absorption of the different sugars has been found in the following decreasing order - galactose, glucose, fructose, mannose, xylose.
Question 9
1 / -0

Correct order of gross calorific value is:

A
carb> fat> protein

B
fat> carb> protein

C
protein> carb> fat

D
fat> protein> carb

Solution

Gross calorific value is the amount of energy produced when the unit quantity of a substance is burned at a constant volume under standard conditions in a bomb calorimeter.
For a given volume, fat has the highest gross calorific value followed by protein and carbohydrate

Question 10

1 / -0

Match the enzymes in column I with their respective biochemical reactions in column II. Choose the correct combination from.

Column I	Column II
(P) Transaminases acid	(i) removal of phosphoryl group from a specific amino
(Q) Protein Kinases acid	(ii) removal of $$\alpha$$-amino group from a specific amino
(R) Protein Phosphatases acid	(iii) addition of phosphoryl group to a specific amino
(S) Dehydrogenases	(iv) interconversion of optical isomers
	(v) oxidation and reduction of substrates

P-iv, Q-ii, R-iii, S-v

P-ii, Q-i, R-ii, S-iv

P-ii, Q-iii, R-i, S-v

P-v, Q-ii, R-iii, S-i

Solution

Transaminase enzyme is also called as aminotransferases. It catalyze the removal of an α-amino group from a specific amino acid and transfer it to an α-ketoacid. Protein kinase enzyme carries out phosphorylation process. It catalyzes the addition of phosphoryl group to a specific amino acid.Protein Phosphatases enzyme carries out opposite action to that of protein kinase. It catralyzes the removal of phosphoryl group from a specific amino acid. Dehydrogenase enzyme belongs to the group of oxidoreductases. It carries out oxidation of a substrate by reducing an electron acceptor like NAD, FAD.

Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 74

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Biomolecules Test - 74

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SHARING IS CARING

Question 1

De Herelle

Hershey and Chase

Stanley

Lederberg and Tatum

Question 2

Alcalase

Xylanase

Peroxidase

Catalase

Question 3

$$1$$ only

$$2$$ only

Both $$1$$ and $$2$$

Neither $$1$$ nor $$2$$

Question 4

$$1$$

$$2$$

$$4$$

$$5$$

Question 5

Acetophenone is an ether

Diastase is an enzyme

Cycloheptane is aromatic

All of the above

Solution

Question 6

Enzymes are mostly proteinous in nature

Enzymes are least reactive at optimum temperature

Enzymes are denaturated by ultraviolet rays and at high temperature

Enzyme action is specific

Solution

Question 7

Uracil

Thyamine

Adenine

Cytosine

Solution

Question 8

At the same rate

Glucose is absorbed most rapidly

Fructose is absorbed most rapidly

Galactose is absorbed most rapidly

Solution

Question 9

carb> fat> protein

fat> carb> protein

protein> carb> fat

fat> protein> carb

Solution

Question 10

P-iv, Q-ii, R-iii, S-v

P-ii, Q-i, R-ii, S-iv

P-ii, Q-iii, R-i, S-v

P-v, Q-ii, R-iii, S-i

Solution

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