Biochemistry Basics: Key Concepts and Practice

What is the primary focus of the 30-day biology study challenge?

• Mathematics

• Biology

• Chemistry

• Physics

Which of the following elements is not one of the six most important in biology?

• Hydrogen

• Calcium

• Oxygen

• Carbon

What is the atomic number of sulfur?

• 12

• 8

• 32

• 16

How many covalent bonds can carbon form?

• 4

• 5

• 3

• 2

What is an isotope?

• An element with a different number of protons

• An element with a different atomic number

• An element with a different number of neutrons

• An element with a different number of electrons

Which type of bond involves the sharing of electrons?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What type of molecule is water due to its charge distribution?

• Non-polar

• Polar

• Ionic

• Metallic

What is the pH range of acids?

• 0 to 7

• 0 to 6

• 7 to 14

• 8 to 14

What does the mnemonic 'LEO the lion says GER' help you remember?

• Loss of protons is oxidation, gain of protons is reduction

• Gain of electrons is oxidation, loss of electrons is reduction

• Loss of electrons is oxidation, gain of electrons is reduction

• Gain of protons is oxidation, loss of protons is reduction

What happens to oxygen in cellular respiration?

• It is neutralized

• It is oxidized

• It remains in its elemental form

• It is reduced