Indicate which of the following choices regarding types of f

Indicate which of the following choices regarding types of flagella matches each of the characteristics below:

A.)Prokaryotic flagella b.)Eukaryotic flagella or cilia C.) Both a and B

__ Axoneme __Basal body resembling __flagellin __tubulin __diameter 14nm __diameter 0.25 __reversable rotational motion

__surrounded by extension of plasma membrane __whip or wave like motion

Typical cilia are about the same length as typical prokaryptic flagella but are over 10 times as wide. True or False

Both cili and eukaryotic flagella are compose of nine fused pairs of microtubules surrounding two unfused pairs of microtublues. True or Flas

Regarding enrvionrmental regulation of cell movement, the migration of a cell in response to an increasing concentration of a nutreitn would be an example of

A.) active transport B.)faciliated diffusion C)homeostasis D)chemotaxis E)exocytosis F)dynamic instability

Solution

1.      Indicate which of the following choices regarding types of flagella matches each of the characteristics below:

A.)Prokaryotic flagella -(Flagellin, diameter 14nm, whip or wave like motion )

B.)Eukaryotic flagella or cilia - (Axoneme, Basal body, tubulin, diameter 0.25 µM (flagella of eukaryotic cell), surrounded by extension of plasma membrane, whip or wave like motion, reversible rotational motion (cilia))

C.) Both a and B – (whip or wave like motion (in both eukaryotic and prokaryotic flagella))

[Explaination: Axoneme : The inner core of eukaryotic cilia and flagella consists of a cytoskeletal structure called the axoneme.

Basal body resembling: A basal body is a protein structure found at the base of a eukaryotic cilium and flagellum. It is formed from a centriole and several additional protein structures.

Flagellin: Flagellin is a globular protein in bacterial flagellum.

Tubulin: Tubulin in a protein found in cytoskeleton and cilia and flagella of eukaryotic cell. ]

2.      Typical cilia are about the same length as typical prokaryotic flagella but are over 10 times as wide. False (bacterial flagella is longer then cillia)

3.      Both cili and eukaryotic flagella are composed of nine fused pairs of microtubules surrounding two unfused pairs of microtublues. True (Cillia and flagella have 9+2 arrangement of microtubules)

4.      Regarding environmental regulation of cell movement, the migration of a cell in response to an increasing concentration of a nutrient would be an example of chemotaxis.

[Chemotaxis is defined as directional movement of any organism (bacteria) in response to a chemical stimulus. All living cells (bacteria, somatic cell or multicellular organisms) show directional movement in environment in response to any chemical. It is important in bacteria to find food (glucose) by swimming to high concentration of nutrients.]