BIO 121 Final Exam-Montgomery County
Community College UPDATED ACTUAL
Exam Questions and CORRECT Answers
In 6C6H12O6 there are ________ oxygen atoms? - CORRECT ANSWER - 36
The molecular mass of Na2CO3 is... - CORRECT 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 - CORRECT ANSWER - D. Only H2O is a compound
The tendency of water molecules to stick with another molecule other than water is.... -
CORRECT ANSWER - Adhesion
Which is less dense, solid water or liquid water? - CORRECT 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? - CORRECT ANSWER - 1000x
more
Covalent Bonds - CORRECT ANSWER - share electrons
Ionic Bonds - CORRECT ANSWER - accept electrons
,What does the body NOT break down for energy? - CORRECT ANSWER - RNA
3 most common atoms in our body - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT
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 - CORRECT
ANSWER - unsaturated
Primary structure of a protein is - CORRECT ANSWER - the amino acid sequence of the
polypeptide chain
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 - CORRECT ANSWER - A. Nucleotides
contain lipids
A molecule with the formula C18H32O16 is a - CORRECT ANSWER - polypeptide
Monosaccharides ratio - CORRECT ANSWER - 1:2:1
Ex. Glucose C6H12O2
Isomers are - CORRECT ANSWER - molecules that have the same molecular formula
Disaccharide are - CORRECT ANSWER - 2 monosaccharides together with condensation
reaction (H2O is taken out)
Hydrolysis reaction is - CORRECT ANSWER - adding water
Polysaccharides are - CORRECT ANSWER - Disaccharides + monosaccharides
also hydrophilic
Nucleoid region of prokaryotic cell - CORRECT ANSWER - contains the cells of DNA
Function of nucleoulus is... - CORRECT ANSWER - to manufacture ribosomal RNA
Which location in the cell is UNLIKELY to contain ribosomes or ribosomal units? - CORRECT
ANSWER - Plasma membrane
Community College UPDATED ACTUAL
Exam Questions and CORRECT Answers
In 6C6H12O6 there are ________ oxygen atoms? - CORRECT ANSWER - 36
The molecular mass of Na2CO3 is... - CORRECT 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 - CORRECT ANSWER - D. Only H2O is a compound
The tendency of water molecules to stick with another molecule other than water is.... -
CORRECT ANSWER - Adhesion
Which is less dense, solid water or liquid water? - CORRECT 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? - CORRECT ANSWER - 1000x
more
Covalent Bonds - CORRECT ANSWER - share electrons
Ionic Bonds - CORRECT ANSWER - accept electrons
,What does the body NOT break down for energy? - CORRECT ANSWER - RNA
3 most common atoms in our body - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT
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 - CORRECT
ANSWER - unsaturated
Primary structure of a protein is - CORRECT ANSWER - the amino acid sequence of the
polypeptide chain
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 - CORRECT ANSWER - A. Nucleotides
contain lipids
A molecule with the formula C18H32O16 is a - CORRECT ANSWER - polypeptide
Monosaccharides ratio - CORRECT ANSWER - 1:2:1
Ex. Glucose C6H12O2
Isomers are - CORRECT ANSWER - molecules that have the same molecular formula
Disaccharide are - CORRECT ANSWER - 2 monosaccharides together with condensation
reaction (H2O is taken out)
Hydrolysis reaction is - CORRECT ANSWER - adding water
Polysaccharides are - CORRECT ANSWER - Disaccharides + monosaccharides
also hydrophilic
Nucleoid region of prokaryotic cell - CORRECT ANSWER - contains the cells of DNA
Function of nucleoulus is... - CORRECT ANSWER - to manufacture ribosomal RNA
Which location in the cell is UNLIKELY to contain ribosomes or ribosomal units? - CORRECT
ANSWER - Plasma membrane
