BIOL 1P91 FINAL EXAM QUESTIONS
AND ANSWERS. VERIFIED 2025/2026.
What are the 3 general components that make up an atom? - ANS Protons
Neutrons
Electrons
The sum of the atomic number and the number of neutrons is: - ANS A (the atomic number)
Mass Number
Which of the following is/ are a polar bond?
A) O-H bond in water *
B) C-O in CO2
C) N-N in N2
D) all of the above
E) two of the above - ANS A) O-H bond in water
A substance dissolvable in oil is said to be: - ANS Hydrophobic
- since oil is hydrophobic, it will dissolve hydrophobic substances
- like dissolves like
Amphipathic molecules have two different properties:
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,When dissolved in water, they form: - ANS Amphipathic molecules have hydrophobic and
hydrophilic properties and in water they form micelles.
A pH of 2 is ________ than a pH of 6 - ANS 10,000 times more acidic
-more acidic the lower you go
Which of the following macromolecules is the most hydrophobic?
A) Lipids
B) Proteins
C) Carbohydrates
D) Nucleic Acids
E) All of the above
F) 2 of the above - ANS Lipids are the most hydrophobic
- water hating
What is the following reaction?
R1-OH + H-R2 --> R1-R2 + H20
A) Hydrolysis
B) Condensation
C) Dehydration
D) Decomposition
E) All of the above
F) 2 of the above - ANS Two of the above:
Hydrolysis and Condensation
- they both lose a water to combine molecules
What are the 4 molecules in all living organisms - ANS Hydrogen
Oxygen
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, Nitrogen
Carbon
Which macromolecule contains a sulphydryl functional group?
A) Fatty acids
B) Carbohydrates
C) Steroids
D) Amino acid - ANS Amino Acids
- this is a -SH group that is specifically found in cysteine
What kind of bonds connect sugar monomers - ANS Glycosidic bonds
How do plants store energy? - ANS Starch
- starch is for plants
- glycogen is for animals
Which protein structure involves the formation of a 3D shape due to R-group interactions? -
ANS Tertiary
What are the three types of movement across a membrane? - ANS -Diffusion (passive
transport down the concentration gradient)
- Facilitated Transport ( movement down a concentration gradient using a protein)
-Active Transport (movement against the concentration gradient without the input of energy
and the aid of a protein)
The protein that moves lipids from the outer leaflet to the inner leaflet of the membrane -
ANS Flippase
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
AND ANSWERS. VERIFIED 2025/2026.
What are the 3 general components that make up an atom? - ANS Protons
Neutrons
Electrons
The sum of the atomic number and the number of neutrons is: - ANS A (the atomic number)
Mass Number
Which of the following is/ are a polar bond?
A) O-H bond in water *
B) C-O in CO2
C) N-N in N2
D) all of the above
E) two of the above - ANS A) O-H bond in water
A substance dissolvable in oil is said to be: - ANS Hydrophobic
- since oil is hydrophobic, it will dissolve hydrophobic substances
- like dissolves like
Amphipathic molecules have two different properties:
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,When dissolved in water, they form: - ANS Amphipathic molecules have hydrophobic and
hydrophilic properties and in water they form micelles.
A pH of 2 is ________ than a pH of 6 - ANS 10,000 times more acidic
-more acidic the lower you go
Which of the following macromolecules is the most hydrophobic?
A) Lipids
B) Proteins
C) Carbohydrates
D) Nucleic Acids
E) All of the above
F) 2 of the above - ANS Lipids are the most hydrophobic
- water hating
What is the following reaction?
R1-OH + H-R2 --> R1-R2 + H20
A) Hydrolysis
B) Condensation
C) Dehydration
D) Decomposition
E) All of the above
F) 2 of the above - ANS Two of the above:
Hydrolysis and Condensation
- they both lose a water to combine molecules
What are the 4 molecules in all living organisms - ANS Hydrogen
Oxygen
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Nitrogen
Carbon
Which macromolecule contains a sulphydryl functional group?
A) Fatty acids
B) Carbohydrates
C) Steroids
D) Amino acid - ANS Amino Acids
- this is a -SH group that is specifically found in cysteine
What kind of bonds connect sugar monomers - ANS Glycosidic bonds
How do plants store energy? - ANS Starch
- starch is for plants
- glycogen is for animals
Which protein structure involves the formation of a 3D shape due to R-group interactions? -
ANS Tertiary
What are the three types of movement across a membrane? - ANS -Diffusion (passive
transport down the concentration gradient)
- Facilitated Transport ( movement down a concentration gradient using a protein)
-Active Transport (movement against the concentration gradient without the input of energy
and the aid of a protein)
The protein that moves lipids from the outer leaflet to the inner leaflet of the membrane -
ANS Flippase
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
