BIO 311 QUIZZES 1–3 QUESTIONS AND ANSWERS | BIOLOGY EXAM PREP &
STUDY GUIDE 2026/2027
True or False: Because of carbon's special chemical feature, organic compounds may have
isomers. Those isomers may have different chemical, physical, biological or pharmacological
properties - ANS ✔✔True
As chemoheterotrophic animal, human metabolism depends on photosynthesis taking place in
photoautotrophic organisms because photosynthesis:
A. provides organic molecules as nutrients
B. Directly fixes nitrogen, providing a nitrogen source
C. Generates molecular oxygen
D. Both A and B
E. Both A & C - ANS ✔✔Both A & C; provides organic molecules as nutrients and generates
molecular oxygen
Nutrient such as sucrose, glucose may be transported from low concentration side (intestine
lumen) to high concentration side such as cytoplasm of mucosal cells. Regarding the following
figure, which statement is most accurate and complete?
- A is a symporter
- A is a passive transporter
- B is a symport
- B is a secondary active transporter
- B is a symport, and is also a secondary active transporter. - ANS ✔✔B is a symport, and is also
a secondary active transporter.
, Regarding cross biomembrane transporting metabolites, which of the following statements is
most accurate?
A. cross-membrane transport always consumes ATP
B. each transporter specifically transport one molecule to a defined direction
C. polar molecules or larger molecules usually needs proteins called transporters located on the
biomembrane to facilitate the transport
D. small molecules may get through freely
E. cross membrane transport always relies on the electro or chemical gradients - ANS ✔✔C.
polar molecules or larger molecules usually needs proteins called transporters located on the
biomembrane to facilitate the transport
True or False: This molecule contains an aldehyde group. - ANS ✔✔True
For following figure, the beta carbon is? - ANS ✔✔The beta carbon is located directly adjacent
to the alpha carbon. The alpha carbon is the first carbon after the functional group. Essentially,
the beta carbon is the second carbon atom away from the functional group in a molecule.
Isotopes of the common elements in living system are useful in biochemical studies, because
the feature of:
A. radioactivity
B. difference in isotope mass
C. Both A & B
D. Neither A nor B
E. Due to radioactivity and harm to the environment, isotopes are no longer used in biochemical
studies. - ANS ✔✔Both A & B; radioactivity
and difference in isotope mass
STUDY GUIDE 2026/2027
True or False: Because of carbon's special chemical feature, organic compounds may have
isomers. Those isomers may have different chemical, physical, biological or pharmacological
properties - ANS ✔✔True
As chemoheterotrophic animal, human metabolism depends on photosynthesis taking place in
photoautotrophic organisms because photosynthesis:
A. provides organic molecules as nutrients
B. Directly fixes nitrogen, providing a nitrogen source
C. Generates molecular oxygen
D. Both A and B
E. Both A & C - ANS ✔✔Both A & C; provides organic molecules as nutrients and generates
molecular oxygen
Nutrient such as sucrose, glucose may be transported from low concentration side (intestine
lumen) to high concentration side such as cytoplasm of mucosal cells. Regarding the following
figure, which statement is most accurate and complete?
- A is a symporter
- A is a passive transporter
- B is a symport
- B is a secondary active transporter
- B is a symport, and is also a secondary active transporter. - ANS ✔✔B is a symport, and is also
a secondary active transporter.
, Regarding cross biomembrane transporting metabolites, which of the following statements is
most accurate?
A. cross-membrane transport always consumes ATP
B. each transporter specifically transport one molecule to a defined direction
C. polar molecules or larger molecules usually needs proteins called transporters located on the
biomembrane to facilitate the transport
D. small molecules may get through freely
E. cross membrane transport always relies on the electro or chemical gradients - ANS ✔✔C.
polar molecules or larger molecules usually needs proteins called transporters located on the
biomembrane to facilitate the transport
True or False: This molecule contains an aldehyde group. - ANS ✔✔True
For following figure, the beta carbon is? - ANS ✔✔The beta carbon is located directly adjacent
to the alpha carbon. The alpha carbon is the first carbon after the functional group. Essentially,
the beta carbon is the second carbon atom away from the functional group in a molecule.
Isotopes of the common elements in living system are useful in biochemical studies, because
the feature of:
A. radioactivity
B. difference in isotope mass
C. Both A & B
D. Neither A nor B
E. Due to radioactivity and harm to the environment, isotopes are no longer used in biochemical
studies. - ANS ✔✔Both A & B; radioactivity
and difference in isotope mass
