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Flagella and Cilia MCQ - NEET Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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Flagella and Cilia is considered one of the most asked concept.
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EASYThe arrangement of outer and central microtubular in a cilium is called the
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Flagella and Cilia
Flagella and Cilia
Cilia and flagella help in movement of the cell.
Flagella:
- Flagella are long and hair like structures that extend from the plasma membrane.
- They are used for the movement of the entire cell.
- A cell usually has a single flagellum or a few flagella.
Cilia:
- Cilia are short, hair-like structures that are used to move the entire cell.
- Many cilia extend along the entire surface of the cell.
Structure of Flagella and Cilia:
- Cilia and flagella have a similar structure made up of microtubules are arranged in a 9 + 2 format.
- At the core lie two pairs of microtubules that are encased within 9 pairs of microtubules.
Difference between Cilia and Flagella
|
Feature |
Cilia |
Flagella |
|
Appearance |
tiny hair-like structures protruding from the cell body |
whip-like extensions that grow outwards from the cell body |
|
Length |
significantly shorter; usually 5-6 um long |
can extend up to 10 times the cell length. Their length can go up to 1000 um |
|
Thickness |
though short, tend to have greater diameter; around 0.3 to 0.5 um thick |
around 20-25 nm (0.02 to 0.025 um) thin |
|
Density |
present in large numbers on the surface of the cell |
less in number |
|
Cell type |
fungi (yeast), macrophages (white blood cells), protozoa, and sperm cells, epithelial cells located in the respiratory tract also have cilia |
prokaryotic cells |
|
Motion |
produce forward and backward vibrations; movements are similar to a paddle stroke |
produce a whipping action, which means they have a rotatory behaviour |
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