marine biology (181.3.1)

marine biology (181.3.1)Instructions


Read the question below and the response:

After reading the response, write a reply to it. Do not paraphrase the response that was already given, just respond to it.


  1. Which organelle is the site for photosynthesis in eukaryotic cells? What organelle is a long-hair-like structure used in propulsion?



Photosynthesis occurs in organelles called chloroplasts in eukaryotic cells. Chloroplasts contain chlorophyll and undergo photosynthesis. The chlorophyll pigments found in the chloroplasts are the main pigments utilized in photosynthetic reactions. Chloroplasts contain an envelope, which is composed of an outer membrane, inner membrane and an intermembrane space between these layers. It also contains a stroma, which is located inside the envelope. A genome with ribosomes, RHA’s and chloroplasts DNA found in the stroma. When a chloroplast is exposed to light, that’s when photosynthesis starts. The light is absorbed by the chlorophyll and converted to chemical energy in the grana. Then enzymes in the stroma begin a series of reactions which use the chemical energy to convert carbon dioxide molecules into carbohydrate molecules. The plant then uses the carbohydrates for growth and respiration.

The flagellum is a hairlike structure that acts primarily as an organelle of movement. They are found in bacteria, archaea, and eukaryotes. All types of flagellum are used for movement, but they are structurally different. Eukaryota flagellum are long, rod-like structures that are surrounded by an extension of the cell membrane. Bacterial flagella are by the flow of ions, usually hydrogen, but sometimes sodium. Archaeal flagella are powered by ATP, which also powers eukaryotic flagella.

 (YOU NEED TO WRITE A REPLY (100-150 words) TO THIS RESPONSE and do not paraphrase or rewrite the given response)

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