How many different proteins may be present in normal LDH? 

(A) One 

(B) Two 

(C) Three 

(D) Four 

Trypsin has no action on 

(A) Hemoglobin 

(B) Albumin 

(C) Histone 

(D) DNA

Isoenzymes can be characterized by 

(A) Proteins lacking enzymatic activity that are necessary for the activation of enzymes 

(B) Proteolytic enzymes activated by hydrolysis 

(C) Enzymes with identical primary structure 

(D) Similar enzymes that catalyse different reaction

In non-competitive enzyme action 

(A) V_max is increased 

(B) Apparent k_m is increased 

(C) Apparent k_m is decreased 

(D) Concentration of active enzyme molecule is reduced

What are zymogens?

Which of the following is a substratespecific enzyme? 

(A) Hexokinase 

(B) Thiokinase 

(C) Lactase 

(D) Aminopeptidase

Coenzymes are required in which of the following reactions? 

(A) Oxidation-reduction 

(B) Transamination 

(C) Phosphorylation 

(D) All of these

An increase in LDH-5 enzyme is seen in the following except 

(A) Acute hepatitis 

(B) Muscular distrophies 

(C) Breast carcinoma 

(D) Pulmonary embolism 

Coenzymes combine with 

(A) Proenzymes 

(B) Apoenzymes 

(C) Holoenzymes 

(D) Antienzymes

Multiple forms of the same enzymes are known as 

(A) Zymogens 

(B) Isoenzymes 

(C) Proenzymes 

(D) Pre-enzymes