Consider statements about cell biology: 1. The plasma membrane is selectively permeable. 2. The nucleolus is the site of protein synthesis. 3. Lysosomes contain digestive enzymes. Which are correct? MCQ with Answer and Explanation

Explanation:
The Golgi apparatus forms the acrosomal vesicle, which contains hydrolytic enzymes for penetrating the egg during fertilization.

Explanation:
Gel electrophoresis, especially agarose gel electrophoresis, separates DNA, RNA, or protein fragments based on size and charge under an electric field. Smaller fragments move faster through the gel matrix. Centrifugation separates by density, chromatography by differential partitioning, spectrophotometry measures light absorption. Electrophoresis is a fundamental tool in molecular biology.

Explanation:
Due to the rigid cell wall, plant cells form a cell plate at the equator, which develops into a new cell wall separating daughter cells. Animal cells form a cleavage furrow.