Red algae (Rhodophyta) are photosynthetic protists that primarily live in marine environments, often at greater depths than green plants.
Outline the role of named photosynthetic pigments in the light-dependent stage of photosynthesis.
Suggest why red algae require accessory pigments, such as phycoerythrin, which absorb blue and green light.
Unlike chloroplasts of flowering plants which have thylakoids stacked into grana, the chloroplasts of red algae contain unstacked, individual thylakoids lying parallel to each other. Describe two structural differences between the chloroplast of a red alga described here and a typical chloroplast found in flowering plants.
The figure below shows a diagram of a section of the cell surface membrane of a red alga.
State and explain how one property of region B contributes to the stability or barrier function of the plasma membrane.
Outline two roles of membranes within eukaryotic cells.
