Compare cilia and flagella. Say how they differ in length and in what they move…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Compare cilia and flagella. Say how they differ in length and in what they move. Name the structure that forms the core of both, and the structure each grows from.
Need a reminder? The key ideaShow
Ribosomes: RNA and protein, no membrane; 80S = 60S + 40S, 70S = 50S + 30S; S is the Svedberg unit. Cytoskeleton: microtubules, microfilaments, intermediate filaments. Axoneme: nine doublets and a central pair (9 + 2). Centriole: nine triplets round a hub, no central pair. Centrioles form basal bodies and spindle fibres.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Cilia. They are short. They work like oars, moving the cell or the fluid around it.
Step 2. Flagella. They are longer, and they move the cell.
Step 3. The core. Both have an axoneme with the 9 + 2 array of microtubules, covered by the plasma membrane.
Step 4. The base. Both grow from a basal body, a centriole-like structure.
Answer: cilia are short and move the cell or the fluid; flagella are longer and move the cell; both have a 9 + 2 axoneme and grow from basal bodies.
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