Biology · BIOLOGICAL CLASSIFICATION

Refer to the structural representation of the bacteriophage in Figure 2.6(b). Which option correctly pairs the morphological region with its accurate biological role or molecular composition?

1. Head encloses double-stranded DNA; Tail fibres assist in attachment to the bacterial host cell wall
2. Collar contains peptidoglycan; Tail fibres inject viral protein into host cytoplasm
3. Sheath contains single-stranded DNA; Collar forms the primary chitin cell wall
4. Head contains single-stranded RNA; Sheath functions in photosynthetic light absorption