Question

Alloenzymes are
1. Enzyme precursors
2. Similar enzymes formed from different genes.
3. Different enzymes of an enzyme system.
4. Antienzymes

Answer 1

Hint:- Enzymes were discovered by R.L. Hunter and Clement Marker in the year 1957.
Alloenzymes are the common biological enzymes. They are used as phylogenetic molecular markers. Enzymes are classified in different categories on the basis of their activity.

Complete step-by-step solution:-
An enzyme is a substance that is produced by a living organism that acts as a catalyst and boosts the rate of reaction. According to the enzyme catalyzation, they are classified into seven types-oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases and translocases. The main properties of enzymes include speeding up of reaction rate, the transformation of one form to another which is much more useful and specificity towards the substrate.
Alloenzymes are a group of enzymes that are encoded by different alleles present on the same locus but catalyze different reactions. They can be separated from one another using capillary electrophoresis. They perform certain biological functions.
1. Enzyme precursors- They are the substances that help convert the inactivated form of an enzyme into its active state.
2. Similar enzymes formed from different genes - Certain enzymes appear similar in their structure but their gene composition is different or they are formed from different genes.
3. Different enzymes of an enzyme system - An enzyme system consists of a group of enzymes that perform the same function. They consist of more than one enzyme in an enzyme system.
4. Antienzyme - It consists of an agent that inhibits or stops the activity of an enzyme. It may be an inhibitory enzyme or an antibody to an enzyme. Alloenzyme is similar to enzymes formed from different genes.
The correct answer is option C.

Note:- Allozymes have different structures and catalyze different reactions. Isoenzymes differ in amino acid sequence but they catalyze the same chemical reaction.