Consider statements about scientists: 1. Robert Hooke discovered the cell. 2. Louis Pasteur disproved spontaneous generation. 3. Alexander Fleming discovered the structure of DNA. Which are correct? MCQ with Answer and Explanation

Explanation:
Light reactions occur in the thylakoid membranes, where photosystems I and II, electron transport chains, and ATP synthase are located. Light energy is captured to produce ATP and NADPH and split water. The Calvin cycle (light-independent) occurs in the stroma.

Explanation:
Iron is a trace mineral (micronutrient) needed in small amounts for hemoglobin and myoglobin function. Calcium and phosphorus are macro-minerals required in larger amounts for bones. Sodium is a major extracellular electrolyte. Trace elements include iron, zinc, copper, iodine, selenium, manganese, etc. Iron deficiency causes anemia. Iron is absorbed in duodenum and stored as ferritin.

Explanation:
Prokaryotic cells lack membrane-bound organelles such as mitochondria, ER, Golgi, etc. They have a nucleoid region, 70S ribosomes, and typically a single circular chromosome. Thus, the statement that they contain membrane-bound organelles is incorrect.