BHSC- EXAM 1QUESTIONS & ANSWERS
What are three ways the lipid bilayer adjusts its fluidity - Answers -1. Shorter fatty
chains
2. Kinks (being unsaturated)
3. Cholesterol (maintains equalibrium)
What purpose do the plasma membrane serve? - Answers -Cell communication, import
and export, cell growth, motility.
What is the import of a molecule from a cell. - Answers -Endocytosis
What is the export of a molecule from a cell. - Answers -Exocytosis
What is a phospholipid comprised of? - Answers -Hydrophilic head (phosphate,
glycerol) hydrocarbon tail (hydrophobic)
How to identify whether an R-group is polar: - Answers -1. Does the side chain have a
negative charge?
2. Does it have an oxygen- if so its uncharged polar.
How to nonpolar molecules rearrange to be the most energy efficient? - Answers -
Aggregation. Hydrophobic molecule tend to congregate together.
How many fatty acid chains do triglycerides have? - Answers -Three
What is the structure of an amino acid? - Answers –
What kind of bond is between nucleic acids? - Answers -Phospholiedster covalent
Bond between amino acid? - Answers -Peptide
Sugar bonds? - Answers -Glycosidic
What are three ways the lipid bilayer adjusts its fluidity - Answers -1. Shorter fatty
chains
2. Kinks (being unsaturated)
3. Cholesterol (maintains equalibrium)
What purpose do the plasma membrane serve? - Answers -Cell communication, import
and export, cell growth, motility.
What is the import of a molecule from a cell. - Answers -Endocytosis
What is the export of a molecule from a cell. - Answers -Exocytosis
What is a phospholipid comprised of? - Answers -Hydrophilic head (phosphate,
glycerol) hydrocarbon tail (hydrophobic)
How to identify whether an R-group is polar: - Answers -1. Does the side chain have a
negative charge?
2. Does it have an oxygen- if so its uncharged polar.
How to nonpolar molecules rearrange to be the most energy efficient? - Answers -
Aggregation. Hydrophobic molecule tend to congregate together.
How many fatty acid chains do triglycerides have? - Answers -Three
What is the structure of an amino acid? - Answers –
What kind of bond is between nucleic acids? - Answers -Phospholiedster covalent
Bond between amino acid? - Answers -Peptide
Sugar bonds? - Answers -Glycosidic
