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Question:

Read the five statements below a, b, c, d and e. From the options given, select the one which includes the statement that is not representative of an argument presented in the passage.

A. Sperms use spring like engines made of actin filament.
B. Myosin and kinesin are unrelated.
C. Nanotechnology researchers look for ways to power molecule-sized devices.
D. Motor proteins help muscle contraction.
E. The dynein motor is still poorly understood.

Explanation:

Statement (a) appears in the sixth paragraph- Some sperm use spring like engines made of actin filaments to shoot out a barb that penetrates the layers that surround an egg. Therefore (a) is true and can be eliminated.
Statement (c) appears in the second paragraph- The ability of such engines to convert chemical energy into motion is the envy of nanotechnology researchers looking for ways to power molecule-sized devices. Therefore, (c) can be eliminated.
Statement (d) appears in the third paragraph- We wouldn't make it far in life without motor: proteins. Our muscles wouldn’t contract.
The fourth paragraph states- Myosin molecules, best known for their role in muscle contraction, form chains that lie between filaments of another protein called actin. (d) can be eliminated as well.
Statement (e) appears in the fourth paragraph- The dynein motor, on the other hand, is still poorly understood. Therefore, it is true and can be done away with.
Statement (b) does not appears in the fourth paragraph- But newly discovered similarities in the motors’ ATP-processing machinery now suggest that they (Myosin and Kinesin) share a common ancestor -molecule. Therefore, they are related. Only option (b) is not representative and it is only in option 1.
Hence, the correct answer is option 1.

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