BIOLOGY 121 EXAM SCRIPT 2026 DETAILED
Q&A RESOURCE WITH COMPLETE
SOLUTION GRADED A+
⩥ The molecular mass of Na2CO3 is...
Answer: 106
⩥ In the equation 2H2 + 02 ---> 2H2O....
A. H2, O2, and H2O are all compounds
B. H2, O2, and H2O are all elements
C. Only H2 and O2 are compounds
D. Only H2O is a compound
Answer: D. Only H2O is a compound
⩥ The tendency of water molecules to stick with another molecule other
than water is....
Answer: Adhesion
⩥ Which is less dense, solid water or liquid water?
Answer: Liquid water-the molecules can fit closer together because they
are breaking and reforming, unlike ice molecules
,⩥ pH of 3 is how many times more acidic than pH of 6?
Answer: 1000x more
⩥ Covalent Bonds
Answer: share electrons
⩥ Ionic Bonds
Answer: accept electrons
⩥ What does the body NOT break down for energy?
Answer: RNA
⩥ 3 most common atoms in our body
Answer: hydrogen, oxygen, and carbon
⩥ Which of the following contains a carboxyl group and an amino
group?
A. Amino acid
B. Fat
C. Sugar
D. Vinegar
, Answer: A. Amino acid
⩥ Which of the following statements about dehydration synthesis
(condensation) is FALSE?
A. One monomer loses hydrogen atoms, other hydroxyl group
B. H2O is formed as the monomers are joined
C. Covalent bonds are formed between monomers
D. Animal digestive systems utilize to break down food
Answer: D. Animal digestive systems utilize to break down food
⩥ An oil may be converted into a substance that is solid at room
temperature by
Answer: adding hydrogen, decreasing the number of double bonds in
molecules
⩥ Fatty acids with double bonds between some of their carbons are said
to be
Answer: unsaturated
⩥ Primary structure of a protein is
Answer: the amino acid sequence of the polypeptide chain
⩥ Which of the following are false about nucleotides?
Q&A RESOURCE WITH COMPLETE
SOLUTION GRADED A+
⩥ The molecular mass of Na2CO3 is...
Answer: 106
⩥ In the equation 2H2 + 02 ---> 2H2O....
A. H2, O2, and H2O are all compounds
B. H2, O2, and H2O are all elements
C. Only H2 and O2 are compounds
D. Only H2O is a compound
Answer: D. Only H2O is a compound
⩥ The tendency of water molecules to stick with another molecule other
than water is....
Answer: Adhesion
⩥ Which is less dense, solid water or liquid water?
Answer: Liquid water-the molecules can fit closer together because they
are breaking and reforming, unlike ice molecules
,⩥ pH of 3 is how many times more acidic than pH of 6?
Answer: 1000x more
⩥ Covalent Bonds
Answer: share electrons
⩥ Ionic Bonds
Answer: accept electrons
⩥ What does the body NOT break down for energy?
Answer: RNA
⩥ 3 most common atoms in our body
Answer: hydrogen, oxygen, and carbon
⩥ Which of the following contains a carboxyl group and an amino
group?
A. Amino acid
B. Fat
C. Sugar
D. Vinegar
, Answer: A. Amino acid
⩥ Which of the following statements about dehydration synthesis
(condensation) is FALSE?
A. One monomer loses hydrogen atoms, other hydroxyl group
B. H2O is formed as the monomers are joined
C. Covalent bonds are formed between monomers
D. Animal digestive systems utilize to break down food
Answer: D. Animal digestive systems utilize to break down food
⩥ An oil may be converted into a substance that is solid at room
temperature by
Answer: adding hydrogen, decreasing the number of double bonds in
molecules
⩥ Fatty acids with double bonds between some of their carbons are said
to be
Answer: unsaturated
⩥ Primary structure of a protein is
Answer: the amino acid sequence of the polypeptide chain
⩥ Which of the following are false about nucleotides?
