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

Your answers are correct! Well done!

1. Your answer is correct! The main components of our body cells are indeed carbohydrates and proteins. These two macromolecules play essential roles in various cellular processes such as energy production, structural support, and cell signaling.

2. Your answer is correct! Organic compounds always contain carbon. Carbon is the backbone of organic molecules and is involved in forming the diverse structures and functions found in living organisms.

3. Your answer is correct! H20 (water) is a compound. A compound is a substance composed of two or more different elements chemically bonded together. In the case of water, it consists of two hydrogen atoms chemically bonded to one oxygen atom.

4. Your answer is correct! Water is such a vital part of an organism's existence because it functions in all the ways listed. Water serves as a medium for chemical reactions to occur within cells, it transports materials such as nutrients and waste products, and it acts as an insulator, helping to regulate and maintain body temperature.

5. Your answer is correct! Calcium is an inorganic molecule found in bones. It plays a crucial role in providing structural support and strength to bones and teeth. In addition, calcium is involved in various physiological functions like muscle contraction, nerve transmission, and blood clotting.