Yeast produces an enzyme complex which is responsible for fermentation. Which is the enzyme complex?

The correct option is Zymase.

Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In yeast, the conversion of sugar (glucose) into ethanol and carbon dioxide is facilitated by a naturally occurring mixture of various enzymes.
This specific enzyme complex responsible for catalyzing the fermentation of sugar into alcohol and carbon dioxide is known as zymase.

Let's look at why the other options are not the primary enzyme complex for fermentation:
1. Invertase: This enzyme catalyzes the hydrolysis (breakdown) of sucrose into glucose and fructose, but it does not carry out the subsequent fermentation process itself.
2. Aldolase: This is an enzyme involved in glycolysis that splits fructose 1,6-bisphosphate into DHAP and GAP.
3. Dehydrogenase: This is a general class of enzymes that oxidize a substrate by transferring hydrogen to an electron acceptor, but it does not represent the overall complex responsible for yeast fermentation.