Biology · CELL THE UNIT OF LIFE

Consider the following statements regarding the ultrastructure of chloroplasts: 1. The inner chloroplast membrane is relatively less permeable than the outer membrane. 2. The stroma contains enzymes required for the synthesis of carbohydrates and proteins, as well as 70S ribosomes and small double-stranded circular DNA. 3. The chlorophyll pigments are present in the stroma lamellae exclusively. Which of the above statements are correct?

1. 1 and 3 only
2. 2 and 3 only
3. 1, 2 and 3
4. 1 and 2 only