Why do microbes need the following elements? In what molecules do you find these elements?    Nitrogen     Sulfur     Phosphorus   Carbon

х This biomolecule is typically used as a source of energy for cellular respiration. A -о OH О ор 0 O=P о ОН O OH N. N NH₂ NH₂ N NH x в I НО CH OH -I Н ОН Н I ОН Н ОН

organic compunds : 1. always contain oxygen 2. always contain nitrogen 3. always contain helium 4. always contain phosphrous 5. always contain carbon

1) If the pH of the rain drops from 6 to 5 due to air pollution, the rain has become: a) two time more acidic b) four-time more acidic c) ten time more acidic d) one thousand times more acidic 2) which of combination of statement is correct ? the denaturation of protein  1- causes changes in tertiary structure 2- is always an irreversible process 3-has no influence on the solubility 4-occurs only by interaction with heavy metals 5-does not influence covalent bonds and hydrogen bonds select one: a) only 1 is correct b) only 1 and 2 are correct  c) only 3 and 4 are correct d) only 3, 4 and 5 are correct  e) only 1, 2 and 5 are correct