EASY
Earn 100

Prosthetic group is organic or inorganic?

Important Questions on Chemical Constituents of Living Cell

MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Solid and dotted lines represent the activities of pepsin and salivary amylase enzymes of the digestive tract, respectively. Which one of the following graphs best represents their activity vs pH?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
The enzyme bearing E.C 2.7.1.2 is:
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Ethanol is used to treat methanol toxicity because ethanol
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Consider the following statements:
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.
HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes

Find out where transketolase and epimerase reactions occur among the following:

i) G-3-P+DHAP⟶ Fructose -1-6- bisphosphate

ii) Sedoheptulose- 7- Phosphate +G-3-P⟶ Xylulose -5-P+ Ribose -5- Phosphate

iii) Ribose -5- Phosphate ⟶Ribulose -5- Phosphate

iv) Xylulose -5 -Phosphate ⟶ Ribulose-5 - Phosphate

v) Fructose - 6 -Phosphate +G-3-P⟶ Xylulose- 5 -Phosphate + Erythrose -4-Phosphate

The correct combination is

HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Which one of the following statements is incorrect?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Proenzymes are also known as _____.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Antibodies having catalytic activity is known as _____ .
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Which of the followings is/are the class(s) of enzymes?
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
The enzyme hexokinase which catalysis glucose to glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of

I. Competitive inhibition

II. Non-competitive inhibition

III. Feedback allosteric inhibition

Which of the above statements is/are correct?
HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
The lock and key theory of enzyme action was postulated by Emil _____. (Fischer/Palade)
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
An enzyme that catalyzes the conversion of an aldose sugar to a ketose sugar would be classified as one of the _____.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
NAD+ is a _____ of dehydrogenase enzyme
MEDIUM
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
The concentration of substrate at a point half of the rate of the maximum velocity of enzyme reaction is known as _____.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Km is known as _____ constant.
HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Which of the followings are not the classes of enzymes?
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes

An organic substance bound to an enzyme and essential for its activity is called _____. (coenzyme/cofactor)

HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
Lactate dehydrogenase is an example of _____.
EASY
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
The enzyme that transfers any ion or group except hydrogen from the substrate to any other substrate belongs to the _____ class of enzymes.
HARD
Biology>Cell Structure and Function>Chemical Constituents of Living Cell>Enzymes
A prosthetic group is a non-amino acid component that is part of the structure of the heteroproteins being _____ linked to the apoprotein.