BIO 180 FINAL EXAM BYUI QUESTIONS AND VERIFIED
ANSWERS
The longer the wavelength the higher the energy of an electromagnetic wave - Answers
- False
Which of the following elements has a valence of two? - Answers - Oxygen and Sulfur
What type of bond is formed by the equal sharing of valence electrons? - Answers - A
non-polar covalent bond
Polar molecules, such as water, will commonly participate in which of the following
intermolecular interactions - Answers - Hydrogen bonding with polar molecules.
Electrostatic interaction with ionic compounds.
Which of the following compounds would have the capability of forming a hydrogen
bond? - Answers - A molecule formed by polar covalent bonds.
What is the concentration of a solution with a volume of 300 mL containing 24 grams of
sucrose (C12H22O11)? - Answers - 8%
A weak acid like acetic acid: - Answers - Will resist changes in pH so long as the pH is
near the pKa.
Which of the following are true regarding pKa? - Answers - pKa is the negative
logarithm of the Ka.
pKa is the pH when the conjugate base and weak acid are at the same concentration.
pKa is physical characteristic of each unique buffering system
pH = pKa + log ([A-] / [HA])
A certain channel protein in the cell membrane is equally permeable to both Na+ and
K+. Na+ concentrations are high on the outside of the cell (which is positive), while K+
concentrations are high on the inside of the cell (which is negative). Assuming equal
concentration gradients for both Na+ and K+, which of the following statements is true
regarding the movement of these ions through this channel? - Answers - More Na+ ions
will be transported.
Which of the following types of transport can use the electrochemical gradient of sodium
to move a solute against its concentration gradient? - Answers - Secondary Active
Transport
, Which of the following membrane activities require energy from ATP hydrolysis? -
Answers - Na+ ions moving out of the cell.
Which of the following processes would enable a cell to take in large quantities of a
specific molecules such as LDL cholesterol? - Answers - Phagocytosis
Receptor mediated endocytosis
A drug designed to inhibit the response of cells to testosterone would almost certainly
result in which of the following? - Answers - A decrease in transcriptional activity of
certain genes.
Which type of receptor uses GTP hydrolysis in its mechanism? - Answers - G-protein
coupled receptors
An inhibitor of which of the following could be used to block the release of calcium from
the endoplasmic reticulum? - Answers - Phospholipase C
Carbohydrates carry multiple copies of this group. - Answers - Hydroxyl group
Which functional group is the only one with a nitrogen atom? - Answers - Amino
When numbering the carbons in a monosaccharide that is in the ring form, what do you
look for to know where carbon #1 is? - Answers - The anomeric carbon
Fructose forms multiple hydrogen bonds with water. - Answers - True
What functional groups are present in a fatty acid? - Answers - Carboxyl, Alkyl
A trans-fat would contain fatty acids that are _____________ and have double bonds
with the carbon chain leaving and entering on the _________________ sides of the
double bond. - Answers - Unsaturated;opposite
How do we refer the two ends of a strand of nucleic acid? - Answers - The 3' end and
the 5' end.
Phosphodiester linkages are formed between which two functional groups? - Answers -
a phosphate and hydroxyl group
Van der Waal interactions between hydrocarbon chains are important in which level of
protein structure? - Answers - Tertiary, quaternary
All the amino acids share which of the following functional groups? - Answers - Carboxyl
An electron loses potential energy when it: - Answers - shifts to a more electronegative
atom.
ANSWERS
The longer the wavelength the higher the energy of an electromagnetic wave - Answers
- False
Which of the following elements has a valence of two? - Answers - Oxygen and Sulfur
What type of bond is formed by the equal sharing of valence electrons? - Answers - A
non-polar covalent bond
Polar molecules, such as water, will commonly participate in which of the following
intermolecular interactions - Answers - Hydrogen bonding with polar molecules.
Electrostatic interaction with ionic compounds.
Which of the following compounds would have the capability of forming a hydrogen
bond? - Answers - A molecule formed by polar covalent bonds.
What is the concentration of a solution with a volume of 300 mL containing 24 grams of
sucrose (C12H22O11)? - Answers - 8%
A weak acid like acetic acid: - Answers - Will resist changes in pH so long as the pH is
near the pKa.
Which of the following are true regarding pKa? - Answers - pKa is the negative
logarithm of the Ka.
pKa is the pH when the conjugate base and weak acid are at the same concentration.
pKa is physical characteristic of each unique buffering system
pH = pKa + log ([A-] / [HA])
A certain channel protein in the cell membrane is equally permeable to both Na+ and
K+. Na+ concentrations are high on the outside of the cell (which is positive), while K+
concentrations are high on the inside of the cell (which is negative). Assuming equal
concentration gradients for both Na+ and K+, which of the following statements is true
regarding the movement of these ions through this channel? - Answers - More Na+ ions
will be transported.
Which of the following types of transport can use the electrochemical gradient of sodium
to move a solute against its concentration gradient? - Answers - Secondary Active
Transport
, Which of the following membrane activities require energy from ATP hydrolysis? -
Answers - Na+ ions moving out of the cell.
Which of the following processes would enable a cell to take in large quantities of a
specific molecules such as LDL cholesterol? - Answers - Phagocytosis
Receptor mediated endocytosis
A drug designed to inhibit the response of cells to testosterone would almost certainly
result in which of the following? - Answers - A decrease in transcriptional activity of
certain genes.
Which type of receptor uses GTP hydrolysis in its mechanism? - Answers - G-protein
coupled receptors
An inhibitor of which of the following could be used to block the release of calcium from
the endoplasmic reticulum? - Answers - Phospholipase C
Carbohydrates carry multiple copies of this group. - Answers - Hydroxyl group
Which functional group is the only one with a nitrogen atom? - Answers - Amino
When numbering the carbons in a monosaccharide that is in the ring form, what do you
look for to know where carbon #1 is? - Answers - The anomeric carbon
Fructose forms multiple hydrogen bonds with water. - Answers - True
What functional groups are present in a fatty acid? - Answers - Carboxyl, Alkyl
A trans-fat would contain fatty acids that are _____________ and have double bonds
with the carbon chain leaving and entering on the _________________ sides of the
double bond. - Answers - Unsaturated;opposite
How do we refer the two ends of a strand of nucleic acid? - Answers - The 3' end and
the 5' end.
Phosphodiester linkages are formed between which two functional groups? - Answers -
a phosphate and hydroxyl group
Van der Waal interactions between hydrocarbon chains are important in which level of
protein structure? - Answers - Tertiary, quaternary
All the amino acids share which of the following functional groups? - Answers - Carboxyl
An electron loses potential energy when it: - Answers - shifts to a more electronegative
atom.
