BIO 121 Final Exam-Montgomery County Community College
Question 1.
In 6C6H12O6 there are ________ oxygen atoms?
ANSWER
36
Question 2.
The molecular mass of Na2CO3 is...
ANSWER
106
Question 3.
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
Question 4.
The tendency of water molecules to stick with another molecule other than water is....
ANSWER
Adhesion
Question 5.
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
Question 6.
pH of 3 is how many times more acidic than pH of 6?
ANSWER
1000x more
Question 7.
Covalent Bonds
ANSWER
share electrons
, Question 8.
Ionic Bonds
ANSWER
accept electrons
Question 9.
What does the body NOT break down for energy?
ANSWER
RNA
Question 10.
3 most common atoms in our body
ANSWER
hydrogen, oxygen, and carbon
Question 11.
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
Question 12.
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
Question 13.
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
Question 14.
Fatty acids with double bonds between some of their carbons are said to be
ANSWER
unsaturated
, Question 15.
Primary structure of a protein is
ANSWER
the amino acid sequence of the polypeptide chain
Question 16.
Which of the following are false about nucleotides? A. Nucleotides contain lipids B. Nucleotides contain sugar molecules C.
Nucleotides can be linked together to form nucleic acids D. Nucleotides contain nitrogenous bases
ANSWER
A. Nucleotides contain lipids
Question 17.
A molecule with the formula C18H32O16 is a
ANSWER
polypeptide
Question 18.
Monosaccharides ratio
ANSWER
1:2:1 Ex. Glucose C6H12O2
Question 19.
Isomers are
ANSWER
molecules that have the same molecular formula
Question 20.
Disaccharide are
ANSWER
2 monosaccharides together with condensation reaction (H2O is taken out)
Question 21.
Hydrolysis reaction is
ANSWER
adding water
Question 22.
Polysaccharides are
ANSWER
Disaccharides + monosaccharides also hydrophilic
Question 1.
In 6C6H12O6 there are ________ oxygen atoms?
ANSWER
36
Question 2.
The molecular mass of Na2CO3 is...
ANSWER
106
Question 3.
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
Question 4.
The tendency of water molecules to stick with another molecule other than water is....
ANSWER
Adhesion
Question 5.
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
Question 6.
pH of 3 is how many times more acidic than pH of 6?
ANSWER
1000x more
Question 7.
Covalent Bonds
ANSWER
share electrons
, Question 8.
Ionic Bonds
ANSWER
accept electrons
Question 9.
What does the body NOT break down for energy?
ANSWER
RNA
Question 10.
3 most common atoms in our body
ANSWER
hydrogen, oxygen, and carbon
Question 11.
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
Question 12.
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
Question 13.
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
Question 14.
Fatty acids with double bonds between some of their carbons are said to be
ANSWER
unsaturated
, Question 15.
Primary structure of a protein is
ANSWER
the amino acid sequence of the polypeptide chain
Question 16.
Which of the following are false about nucleotides? A. Nucleotides contain lipids B. Nucleotides contain sugar molecules C.
Nucleotides can be linked together to form nucleic acids D. Nucleotides contain nitrogenous bases
ANSWER
A. Nucleotides contain lipids
Question 17.
A molecule with the formula C18H32O16 is a
ANSWER
polypeptide
Question 18.
Monosaccharides ratio
ANSWER
1:2:1 Ex. Glucose C6H12O2
Question 19.
Isomers are
ANSWER
molecules that have the same molecular formula
Question 20.
Disaccharide are
ANSWER
2 monosaccharides together with condensation reaction (H2O is taken out)
Question 21.
Hydrolysis reaction is
ANSWER
adding water
Question 22.
Polysaccharides are
ANSWER
Disaccharides + monosaccharides also hydrophilic
