The animal that has a closed circulatory system is: MCQ with Answer and Explanation

Explanation:
Vitamin K is a cofactor for γ-glutamyl carboxylase, which modifies glutamate residues in clotting factors, enabling calcium binding and coagulation.

Explanation:
Zymase is the enzyme complex in yeast (Saccharomyces cerevisiae) that catalyzes the anaerobic breakdown of glucose to ethanol and CO₂ (alcoholic fermentation). Invertase hydrolyzes sucrose to glucose and fructose. Urease acts on urea. Pepsin is a protease. Fermentation is used in baking and brewing industries. The overall equation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂.

Explanation:
The gall bladder, a small pear-shaped sac under the liver, stores and concentrates bile produced by the liver, releasing it into the duodenum in response to cholecystokinin (CCK). The liver makes bile, pancreas secretes enzymes, duodenum is the entry point.