10. The green algae Chlamydomonas reinhardtii (see image below) uses flagella to

Question

10. The green algae Chlamydomonas reinhardtii (see image below) uses flagella to move about. Your friend has carried out a screen to identify immobile Chlamydomonas mutants. One of the mutants is particularly interesting because in spite for being able to form fagella, it is unable to move Which of the following proteins is most likely to be affected by a mutation that inactivates the function of this protein? (1 point) O cytoplasmic kinesin O axonemal dynein a component of the intraflagellar transport (FT) complex, which is critical for cilla formation appendage protein of the mother centriole alpha tubulin

Explanation / Answer

Answer: Choice 3

Reason: The motion of unicellular microbes is brought about by the rhythmmic motion of the flagella. The flagella contains flagellar proteins including secondary proteins such as dynein, annexin etc. However, the movement and locotion of the whole body is based upon the ciliar proteins and intraflagellar proteins since they are most extensively involved in the formation and function of flagella. The cytoplasmic skeleton, ciliar proteins and the alpha tubulin etc play a role in assisting the motion executed by the flagella, but do not initiate the movement on their own. Thus, failure of movement must have been arisen due to fault in any component of IFT complex.

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