Which of the following is a unique feature of plant cells compared to animal cells? MCQ with Answer and Explanation

Explanation:
The stomach secretes gastric juice containing hydrochloric acid and the enzyme pepsin, which initiates the digestion of proteins into smaller peptides. The small intestine is the primary site for the final digestion of food and the absorption of most nutrients (amino acids, simple sugars, fatty acids, vitamins) into the bloodstream through its villi. The large intestine (colon) primarily absorbs water, electrolytes, and some vitamins produced by gut bacteria, forming solid feces. All statements are correct.

Explanation:
Biological nitrogen fixation, performed by bacteria (Rhizobium, Azotobacter) and cyanobacteria, reduces N₂ to NH₃. Nitrification oxidizes ammonia to nitrates, denitrification returns N₂, ammonification releases ammonia from organic matter.

Explanation:
Saccharomyces cerevisiae (baker's yeast) ferments sugars to ethanol and CO₂, a process used in biofuel production, brewing, and baking. Lactobacillus produces lactic acid, Aspergillus oryzae is used in soy sauce and sake fermentation, Rhizopus is a mold causing bread spoilage. Yeast can utilize various feedstocks like corn, sugarcane.