Biochemistry

The basic unit of matter is:

• Atom

• Cell

• Compound

• Molecule

The positively charged particles in the nucleus of the atom are:

• Protons

• Neutrons

• Electrons

• Quarks

The neutrally charged particles in the nucleus of the atom are:

• Protons

• Neutrons

• Electrons

• Quarks

The negatively charged particles outside the nucleus of the atom are:

• Protons

• Neutrons

• Electrons

• Quarks

If an atom loses electrons it becomes:

• a positive ion

• a negative ion

• a neutral ion

• a different element

If an atom gains electrons it becomes:

• a positive ion

• a negative ion

• a neutral ion

• a different element

In a water molecule Hydrogen and Oxygen share pairs of electrons. This is an example of a(n)

• Hydrogen Bond

• Covalent Bond

• Ionic Bond

Sodium gives its one outer electron to Chlorine creating the compound Sodium Chloride or salt. This is an example of a(n)

• Hydrogen Bond

• Colvalent Bond

• Ionic Bond

Water molecules have the unique ability to stick together through what type of bond?

• Hydrogen Bond

• Covalent Bond

• Ionic Bond

What macromolecule is made of C, H, and O in a 1:2:1 ratio and is used as main source of energy? Ex: starch, sugar, cellulose

• Carbohydrate

• Protein

• Nucleic Acid

• Lipid