Chemistry of Life

Multiple Choice
1.
Which of the following form the main components of our body cells?

carbohydrates and proteins
fat and phosphorous
proteins and iron
nucleic acids and calcium

2.
Organic compounds always contain______.

water
oxygen
nitrogen
carbon

3.
Which of these is a compound?

Ca
Mg
Na
H20

4.
Water is such a vital part of an organism’s existence because

all the chemical reactions take place in water.
water is used to transport materials.
water acts as an insulator.
all of the above

5.
_______ is an inorganic molecule found in bones.
Salt
Calcium
Nucleic acid
Lipids

My Answer: PLEASE BE HONEST PLEASE THANKS =)

1 carbohydrates and proteins
2 carbon
3 H20
4 all of the above
5 Calcium

Anybody ? Please =(

Please, Never Mind I Got Thanks Any Way =(!!! .

Why are you calling chemistry questions math?

Your answers are correct:

1. The main components of our body cells are carbohydrates and proteins.
2. Organic compounds always contain carbon.
3. H20 is a compound (water).
4. Water is a vital part of an organism's existence because it is used to transport materials, acts as an insulator, and all chemical reactions take place in water. Therefore, the correct answer is "all of the above."
5. Calcium is an inorganic molecule found in bones.

Well done!