Chapter 2 - Chemical Basis of Life

What is the maximum number of electrons the first electron shell of an atom can hold?

• 4

• 6

• 2

• 8

What answer choice describes radioactive isotopes?

• They are unstable but become stable whenever they want.

• They are stable and participate in chemical bonding.

• They do whatever they want.

• They are unstable and will decompose, releasing energy.

RNA and DNA are examples of __________

What is the most abundant inorganic substance in the body?

• Air

• Water

• Fat

• Muscle

Which of the following is an element?

• Iron

• Sodium Chloride

• Glucose

• Fructose

Is it true that on the pH scale, the higher the number on the scale the greater the H^+ concentration is?

• Yes, it is true that the higher the number means a higher H^+ concentration

• No, the lower a number is on the scale, the greater the H^+ concentration is.

What building blocks form triglycerides?

• One fatty acid and three glycerol molecules.

• Three phosphate groups and three glycerol molecules.

• Five glucose molecules and one glycerol molecule.

• Three fatty acids and one glycerol.

Which of the following is NOT a Nucleic Acid?

• RNA

• DNA

• enzymes

Is it true that glucose is a monosaccharide?

• True

• False

What type of molecule undergoes replication?

• Carbohydrates

• Nucleic Acids

• Proteins

• Lipids