Which final cytochrome in the respiratory chain donates electrons to oxygen?

The lines represented by the equation $x^2-y^2-x+3y-2=0$ are :

Given that $K_w$ for water is $10^{-13} \ M^2$ at $62 \ ^oC$,compute the sum of $pOH$ and $pH$ for a neutral aqueous solution at $62 \ ^oC$.

Acetaldehyde forms a white crystalline precipitate on mixing with a ...... solution of

$A$ straight line passing through the origin $O$ meets the parallel lines $4x + 2y = 9$ and $2x + y + 6 = 0$ at points $P$ and $Q$ respectively. In what ratio does the point $O$ divide the line segment $PQ$?

The strength of an acid depends on its tendency to