The rotary engine made of protein at the base of the flagella is driven by ______________(a) Vanderwaal’s foce(b) Proton- motive force(c) Electron passage(d) Exchange of sodium and potassium ionsThe question was asked at a job interview.My question is taken from Two Fundamentally Different Classes of Cells topic in chapter Introduction to Cell of Cell Biology

The rotary engine made of protein at the base of the flagella is drive

1.	The rotary engine made of protein at the base of the flagella is driven by ______________(a) Vanderwaal’s foce(b) Proton- motive force(c) Electron passage(d) Exchange of sodium and potassium ionsThe question was asked at a job interview.My question is taken from Two Fundamentally Different Classes of Cells topic in chapter Introduction to Cell of Cell Biology
Answer» The correct option is (b) Proton- MOTIVE force Easiest explanation: Proton motive force is the flow of protons or hydrogen ions across the bacterial cell MEMBRANE DUE to a concentration gradient set up by cell’s metabolism. This force drives the MOTOR engine at the base of the flagella and HELPS in flagellar movement.

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