BIOLOGY 1201 EXAM 1 FINAL PAPER
QUESTIONS AND SOLUTIONS
◉ Which of these bonds is weakest?
Answer: hydrogen bond
◉ Why isn't this insect drowning?
Answer: surface tension
◉ What is the pH of an aqueous solution with the hydronium ion
concentration[H3O+] = 2 x 10-14 M ?
Answer: 13.7
◉ What is the molar concentration of [H3O+] in a cola that has a
pH of 3.120?
Answer: 7.59 x 10 ^-4
◉ Acidic solution: pH < 7
Neutral solution: pH = 7
Basic solution: pH > 7
Answer: pH scale
,◉ Which molecules show an appropriate number of bonds around
each carbon atom?
Answer:
◉ alcohol
Answer: is polar and makes compounds more soluble in water (O-
H)
◉ carboxylic acid
Answer: acts as an acid
◉ may be a structural isomer of a ketone
Answer: aldehyde (C=O)
◉ forms disulfide bonds
Answer: thiol (S-H)
◉ amine
Answer: acts as a base
◉ organic phosphate
Answer: contributes negative charge
◉ L-dopa is used to treat _____.
, Answer: Parkinson's disease
◉ What kind of effect does R-dopa have on Parkinson's disease?
Answer: none
◉ structural isomers
Answer: differ in the covalent arrangements of their atoms
◉ cis-trans isomers (geometric isomers)
Answer: differ in the arrangement of their atoms about a double
bond
◉ enantiomers
Answer: isomers that are mirror images of each other
◉ Glycogen
Answer: a polysaccharide found in animals
◉ glucose + glucose —> _____ by _____.
Answer: maltose + water ... dehydration synthesis
◉ dehydration synthesis
Answer: Condensation reaction where molecules are connected
by loss of a water molecule.
QUESTIONS AND SOLUTIONS
◉ Which of these bonds is weakest?
Answer: hydrogen bond
◉ Why isn't this insect drowning?
Answer: surface tension
◉ What is the pH of an aqueous solution with the hydronium ion
concentration[H3O+] = 2 x 10-14 M ?
Answer: 13.7
◉ What is the molar concentration of [H3O+] in a cola that has a
pH of 3.120?
Answer: 7.59 x 10 ^-4
◉ Acidic solution: pH < 7
Neutral solution: pH = 7
Basic solution: pH > 7
Answer: pH scale
,◉ Which molecules show an appropriate number of bonds around
each carbon atom?
Answer:
◉ alcohol
Answer: is polar and makes compounds more soluble in water (O-
H)
◉ carboxylic acid
Answer: acts as an acid
◉ may be a structural isomer of a ketone
Answer: aldehyde (C=O)
◉ forms disulfide bonds
Answer: thiol (S-H)
◉ amine
Answer: acts as a base
◉ organic phosphate
Answer: contributes negative charge
◉ L-dopa is used to treat _____.
, Answer: Parkinson's disease
◉ What kind of effect does R-dopa have on Parkinson's disease?
Answer: none
◉ structural isomers
Answer: differ in the covalent arrangements of their atoms
◉ cis-trans isomers (geometric isomers)
Answer: differ in the arrangement of their atoms about a double
bond
◉ enantiomers
Answer: isomers that are mirror images of each other
◉ Glycogen
Answer: a polysaccharide found in animals
◉ glucose + glucose —> _____ by _____.
Answer: maltose + water ... dehydration synthesis
◉ dehydration synthesis
Answer: Condensation reaction where molecules are connected
by loss of a water molecule.
