Basic chem and Biomolecules

What makes a molecule polar?

• Equal sharing of valence electrons
• Unequal sharing of valence electrons
• Stealing of electrons
• Temporary charges that come and go

Covalently bonded molecules are made of atoms that

• share electorns
• shoot their electrons out into space
• move their electrons to the nucleus of the atom
• give electrons to and accept electrons from each other

Ionically bonded compounds are made of atoms that 

• share electrons
• shoot their electrons out into space
• move their electrons to the nucleus of the atom
• give electrons to and accept electrons from each other

Because water has a positively charged end and a negatively charged end, it can be described as

• amphipathic
• hydrophobic
• polar
• nonpolar

Which of the following is correctly defined as the attraction of the hydrogen from one molecule to the oxygen of a different molecule?

• amphipathic
• hydrophobic
• hydrogen bonding
• adhesion

Water molecules require a lot of energy to separate one from the others.  This gives water a high

• density
• polarity
• solvency
• specific heat

If an atom has an equal amount of Protons and electrons, what will its’ charge be?

• Positive
• Negative
• Neutral
• Infinite

What molecule may be formed by dehydration synthesis of fatty acid molecules and glycerol molecules?

• protein
• lipid
• carbohydrate
• nucleic acid

Proteins are synthesized from less complex organic compounds known as 

• starches 
• amino acids
• enzymes
• carbons

These organic molecules are used by the body to build structures and carry out metabolism.

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids