Question

Floridean starch is found in
A. Chlorophyceae
B. Rhodophyceae
C. Myxophyceae
D. Cyanophyceae

Answer 1

Hint: It is found in grains or granules in the cell's cytoplasm. It acts as the primary sink for fixed carbon from photosynthesis. It is stored as grains outside the chloroplast.

Complete Answer:
Floridian starch is found in glaucophytes and red algae. It is a type of storage glucan. It acts as a primary sink for fixed carbon from photosynthesis. Floridian starch is composed of -linked glucose polymers. Floridian starch is often described in contrast to starch and glycogen.

The correct option is, (B) Rhodophyceae (Red Algae).

Additional Information: It is a type of storage glucan and found in grains or granules in the cell's cytoplasm. The polymers that make up floridean starch are sometimes referred to as semi amylopectin.
Floridean starch has been described as lacking amylose. However, amylose has been identified as a component of floridean starch granule in some cases, particularly in unicellular red algae. The structure of floridean starch polymers is most similar to amylopectin. Floridean starch is found in Rhodophyceae or red algae.

The chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. Most Chlorophytes have one or more storage bodies called pyrenoids (central proteinaceous body covered with a starch) that are localized around the chloroplast. Pyrenoids are the sites of carbohydrate storage.
Myxophyceae is the class that contains only small, poorly organized plants, some consisting of only a single cell, while others are multicellular. The algae of this family is commonly known as blue green algae. Myxophyceae is also known as cyanophyceae. Reserve food materials are oil drops and a proteinaceous body called cyanophycean granules.

Note: Red algae is also known as Rhodophytes. Floridian starch is found in Rhodophyceae. It's the vital source of carbohydrate products used for storage purposes in floridian starch.