I know that by definition metabolism is the sum of chemical reactions that happen within each living cell and that provide energy for vital processes. But I can't really understand what definition is trying to be given in the following explanation about one of the major functions of lipids:

* Lipids are precursors of metabolically important chemicals while others are metabolically important.

What exactly does metabolically mean here?

Does it mean that lipids are substances from which substances important for sustaining life are made?

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.

this is a good question! i'll do some research and come back when i have the answer!

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.