Which bacteria are used in a gobar gas plant?

If the angle between the pair of lines $2x^2 + 2hxy + 2y^2 - x + y - 1 = 0$ is $\tan^{-1}(3/4)$ and $h$ is a positive rational number,then the point of intersection of these two lines is

The smallest unit of life is...

What are $X$ and $Y$ respectively in the following reaction?
$Z$-product $\stackrel{Y}{\longleftarrow} 2$-butyne $\stackrel{X}{\longrightarrow} E$-product

Electrons from excited chlorophyll molecule of photosystem $II$ are accepted first by

Which of the following is an example of a ketohexose?