BIO 353 LATEST EXAM PREP QUESTIONS
AND ANSWERS PDF 2026
▶ It is the proteins in the biological membrane that serve to partition water.
Answer: false
▶ Unsaturated sites in the fatty acid tails fo phosophlipids are places that
water can use to leak through the the memberane. Answer: true
▶ Phosphatidylserine influences a great deal of surface area primarily due
to its large size.. Answer: false
▶ Lipids can move freely in the plane of the membrane because they are
covalently linked.. Answer: false
▶ Flip flopping between the inner leaflet and the outer leaflet of the
membrane is a frequent event.. Answer: false
▶ The thickness of the membrane is .................. nm. Answer: 5 nm
▶ In a phospholipid, the fatty acid chains are linked to the .................. by
.................. bonds. Answer: glycerol by ester
▶ The hydrophilic head group is hydrophilic because it can .....................
bond.. Answer: hydrogen
▶ The number of carbons in the esterified fatty acid tails is ............ and
ranges between............ and ................. Answer: even and 14-24
▶ loss of the cell wall. Answer: occurs both for the endosymbiosis theory
and for the endomembrane system
▶ The primitive protoprokaryote likely acquired motility before it lost the cell
wall. Answer: false
▶ Peroxisomes likely originated from endosymbiosis. Answer: false
AND ANSWERS PDF 2026
▶ It is the proteins in the biological membrane that serve to partition water.
Answer: false
▶ Unsaturated sites in the fatty acid tails fo phosophlipids are places that
water can use to leak through the the memberane. Answer: true
▶ Phosphatidylserine influences a great deal of surface area primarily due
to its large size.. Answer: false
▶ Lipids can move freely in the plane of the membrane because they are
covalently linked.. Answer: false
▶ Flip flopping between the inner leaflet and the outer leaflet of the
membrane is a frequent event.. Answer: false
▶ The thickness of the membrane is .................. nm. Answer: 5 nm
▶ In a phospholipid, the fatty acid chains are linked to the .................. by
.................. bonds. Answer: glycerol by ester
▶ The hydrophilic head group is hydrophilic because it can .....................
bond.. Answer: hydrogen
▶ The number of carbons in the esterified fatty acid tails is ............ and
ranges between............ and ................. Answer: even and 14-24
▶ loss of the cell wall. Answer: occurs both for the endosymbiosis theory
and for the endomembrane system
▶ The primitive protoprokaryote likely acquired motility before it lost the cell
wall. Answer: false
▶ Peroxisomes likely originated from endosymbiosis. Answer: false
