How well do you remember chemistry? Take this quiz to find out!

 

 

 

 

 

 

 

 

 

 

 

True or false:

1. Elements are the simplest form of matter with unique chemical properties.

2. Ions only gain electrons.

3. The nucleus contains neutrons, protons, and electrons.

4. Isotopes differ in the number of neutrons.

5. Cations gain electrons and anions loose electrons.

6. The order from strongest to weakest bonds is covalent, ionic, hydrogen, and Van der Waals.

7. Acids are proton donors and bases are proton acceptors. They both depend on the concentration of H+ ions in solution or pH.

8. Membrane potentials are a form of kinetic energy.

9. Forms of energy include electrical, mechanical, radiant

or electromagnetic, and combinations.

10. Hydrophobic substances are nonpolar meaning they

do not dissolve in water easily; where as hydrophilic

substances are polar and dissolve easily in water.

 

Overview

Did you know 24 elements have a biological role in

the human body? Chemistry, especially organic

chemistry, plays an important role in our bodies

and the food we eat! Organic chemistry is the

study of compounds containing carbon. There are

four categories of carbon compounds:

carbohydrates, proteins, lipids, and nucleotides/

nucleic acids.

 

Carbohydrates

Carbohydrates or carbs for shot are organic

hydrophilic molecules. Most people associate carbs with breads and pastas, however carbs simply depend on how much carbon is in a substance.

For example glucose, a common for of carbs, contains 6 carbons. Carbs usually

come in the form of mono, di-, or polysaccharides.

 

Proteins

Proteins are made up of small units called amino acids. These amino acids take

on conformational four changes or structures before they are transformed into

a protein. Many proteins in the body are biological catalysts called enzymes,

which promote rapid reaction rates.

 

Lipids

Opposite of carbs, lipids or fats are hydrophobic molecules. In humans, there are

five types of fats: fatty acids, triglycerides, phospholipids, eicosanoids, and

steroids/cholesterol. Fats not only play a dietary role, but also function as many

structural components within the body, such as cell membranes.

 

Nucleotides

Nucleotides are special monosaccharides or sugars within the body attached to a

nitrous base and phosphate group. They play important physiological roles in DNA, RNA, ATP and cAMP.

 

 

 

 

 

 

 

 

 

 

Answers:

1. True

2. False; ions give or gain electrons

3. False; electrons surround the nucleus

4. True

5. False; reversed

6. True

7. True

8. False; potential energy

9. True

10. False; hydrophobic and hydrophilic are reversed