Cell structures may be separated by centrifuging the cells in a sucrose density gradient. In this process, the cells are broken open and the cell structures are divided into fractions. The diagram shows where some of these fractions are found in a sucrose density gradient. Fraction 1: ribosomes; fraction 2: lysosomes; fraction 3: mitochondria; fraction 4: chloroplast. Which fractions contain cell structures that carry out protein synthesis?
- A1, 2 and 3
- B1, 3 and 4
- C1 only
- D2, 3 and 4