BIOLOGY 1406 EXAM SCRIPT 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
◉ Which of the following bodily process would most likely be hindered
by a lack of water in the body? Answer: digestion
◉ Fiber is not really a nutrient, because it passes through our body
undigested. Why can't fiber be digested and why is it important to our
diet? Answer: The enzymes required to digest cellulose are not produced
in human body; undigested fiber adds bulk to the food easing bowel
movements.
◉ What part of cell membranes gives flexibility to the structure?
Answer: lipids
◉ How do phospholipids contribute to cell membrane structure?
Answer: Phospholipids orient their heads towards the polar molecules
and tails in the interior of the membrane, thus forming a bilayer.
◉ Why have trans fats been banned from some restaurants? How are
they created? Answer: Trans fat is produced by the hydrogenation of oil
that makes it more saturated and isomerized. It increases LDL amounts.
, ◉ What are three functions that lipids serve in plants and/or animals?
Answer: Lipids serve in the storage of energy, as a structural component
of hormones, and also as signaling molecules.
◉ What are the four classes of lipids and what is an example of each?
Answer: 1-lipids like margarine
2-wax like the coating on feathers
3-phospholipids like cell membrane constituents
4-steroid like cholesterol
◉ How does a chaperone work with proteins? Answer: Chaperones
assist proteins in folding.
◉ Which categories of amino acid would you expect to find on the
surface of a soluble protein, and which would you expect to find in the
interior? Answer: Polar and charged amino acids will be found on the
surface. Non-polar amino acids will be found in the interior.
◉ Most organisms carry their hereditary genetic information as DNA.
However, some viruses use RNA instead. The HIV virus has RNA, but
its genetic information is found in host DNA. How does this happen?
Answer: An enzyme reverses the usual process, producing DNA from
the viral RNA.
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
◉ Which of the following bodily process would most likely be hindered
by a lack of water in the body? Answer: digestion
◉ Fiber is not really a nutrient, because it passes through our body
undigested. Why can't fiber be digested and why is it important to our
diet? Answer: The enzymes required to digest cellulose are not produced
in human body; undigested fiber adds bulk to the food easing bowel
movements.
◉ What part of cell membranes gives flexibility to the structure?
Answer: lipids
◉ How do phospholipids contribute to cell membrane structure?
Answer: Phospholipids orient their heads towards the polar molecules
and tails in the interior of the membrane, thus forming a bilayer.
◉ Why have trans fats been banned from some restaurants? How are
they created? Answer: Trans fat is produced by the hydrogenation of oil
that makes it more saturated and isomerized. It increases LDL amounts.
, ◉ What are three functions that lipids serve in plants and/or animals?
Answer: Lipids serve in the storage of energy, as a structural component
of hormones, and also as signaling molecules.
◉ What are the four classes of lipids and what is an example of each?
Answer: 1-lipids like margarine
2-wax like the coating on feathers
3-phospholipids like cell membrane constituents
4-steroid like cholesterol
◉ How does a chaperone work with proteins? Answer: Chaperones
assist proteins in folding.
◉ Which categories of amino acid would you expect to find on the
surface of a soluble protein, and which would you expect to find in the
interior? Answer: Polar and charged amino acids will be found on the
surface. Non-polar amino acids will be found in the interior.
◉ Most organisms carry their hereditary genetic information as DNA.
However, some viruses use RNA instead. The HIV virus has RNA, but
its genetic information is found in host DNA. How does this happen?
Answer: An enzyme reverses the usual process, producing DNA from
the viral RNA.
