Macromolecules like carbs, protein and lipids (fats) are made of smaller molecules like simple sugars (carbs), amino acids (protein), or fatty acids (lipids). These molecules must be broken down to be used.
Let me know if you need further elaboration, I took human nutrition last semester. :)
The air can be considered polluted once harmful or toxic substances are being released and introduced into the air and can bring many types of diseases or health problems to the living organisms in it. Some actions can be done in order to remedy air pollution and these include: government passing regulatory laws, testing for car emissions and carpooling so there will be less driving.
According to the cell theory all living cells come from living cells by multiplying. The cell theory states that: All living things are made up of cells. Cells are the basic unit of living things.
<span>If rna polymerase is missing sigma then transcription initiation would not occur but elongation could.</span>
