Which of the following organisms lacks a cell wall? MCQ with Answer and Explanation

Explanation:
Mitochondria are known as the powerhouse of the cell because they are the site of aerobic respiration and ATP production. They are semi-autonomous because they possess their own circular DNA, RNA, and 70S ribosomes, allowing them to synthesize some of their own proteins and replicate independently of the nucleus.

Explanation:
Ion exchange chromatography separates proteins based on their net surface charge; positively charged proteins bind to cation exchangers, negatively to anion exchangers. Gel filtration separates by size, affinity by specific binding, SDS-PAGE by molecular weight.

Explanation:
Essential amino acids (like lysine, tryptophan) cannot be synthesized by the human body and must be obtained through the diet. Dietary fiber (roughage) is indigestible plant material that adds bulk to stool, promotes peristalsis, and aids in digestion and preventing constipation. Saturated fats have no double bonds between carbon atoms, making them solid at room temperature (like butter); unsaturated fats are liquid (like oils). Thus, statements 1 and 3 are correct.