The stroma of a chloroplast contains enzymes required for the synthesis of carbohydrates and proteins. Which of the following correctly represents the type of genetic material and ribosomes present in the chloroplast stroma?

Step-by-step solution

The stroma of the chloroplast contains its own genetic machinery and protein-synthesizing apparatus. According to NCERT, the chloroplast stroma contains small, double-stranded circular DNA molecules. Additionally, the ribosomes present in the chloroplasts are of the 70S type, which are smaller than the 80S ribosomes found in the cytoplasm of eukaryotes. Thus, the correct combination is circular double-stranded DNA and 70S ribosomes. Answer: Circular double-stranded DNA and 70S ribosomes