Q1: choose the letter of correct answer

1) which one of the following is not an organic compound?
a) methane b) carbon dioxide
c) oil. d) lactic acid
2) which of the following categories includes all others in the list ?
a) monosaccharides
b) Disaccharides
c) starch. d) carbohydrates
3) which one of the following properties does not give the water the ability to become a suitable medium for chemical reactions ?
a) Helps the ionization of salts
b) it is considered a good solvent for salts
c) Gives off the heat produced from the chemical reactions
d) it has a specific heat capacity
4) which of the following statements concerning unsaturated fats is true?
a) they are more common in animals than in plants
b) they have double bonds in the carbon chains of their fattyacids
c) they generally solidify at room temperature
d) they contain more hydrogen than do saturated fats having the same number of carbon atoms
5) which two elements are always found in amino acids?
a) Nitrogen and sulfur
b) carbon and oxygen
c) Hydrogen and phosphorus
d) sulfur and oxygen
6) which joins amino acids together?
a) peptide bonds. b) hydrogen bonds
c) van der waals forces
d) ionic bonds
7) which substance is not part of a nucleotide?
a) A phosphate. b) A base
c) A sugar. d) water
8) which of the following is a substance that lower the activation energy?
a) An ion b) A reactant
c) A catalyst. d) A substrate ​​