BIOC 384 QUESTIONS &
ANSWERS(RATED A+)
Identify the four building block biomolecules from the list to the right, and then match
them with the best description of their primary cellular function.
cell membranes
enzyme catalysis
neurotransmission
cell recognition - ANSWERcell membranes: fatty acids
enzyme catalysis: nucleotides
neurotransmission: amino acids
cell recognition: simple sugars
Two proteins have the same overall fold, but different amino acid sequences. These
proteins likely derived from a common ancestor.
True
False - ANSWERTrue
The reaction below is a step in glycolysis where a 6-carbon sugar (F-1,6-BP) is cleaved
into 2 3-carbon compounds (DHAP and GAP).
Fructose 1,6-bisphosphate (F-1,6-BP) ↔ DHAP + GAP ΔG°' = +23.9 kJ/mol
If under cellular conditions the sign of ΔG for this reaction is negative, the reaction
would proceed spontaneously in the forward direction (F-1,6-BP → DHAP + GAP).
True
False - ANSWERTrue
From the list below, choose THREE molecules that are examples of biological
polymers.
pyruvate
DNA
alcohol dehydrogenase
monosaccharide
, cyanobacteria
fatty acid
glycogen
glycolysis - ANSWERDNA
Alcohol dehydrogenase
glycogen
Limonene is a nonpolar molecule. The water molecules around it forms
hydrogen bonds with itself and entropy decreases.
ionic bonds with itself and the entropy decreases.
The majority of heterotrophs on Earth do not use aerobic respiration as a form of energy
conversion. - ANSWERHeterotrophs are dependent on autotrophs to generate O2 from
H2O in order to support aerobic respiration.
Heterotrophs depend on autotrophs for conversion of light energy to chemical energy.
The majority of autotrophs on Earth require aerobic respiration in order to survive.
The figure below shows two different transcription factors. Which of the following
statements describes these two proteins?
Proteins with different structures can have similar functions.
Protein structure is not determined by its amino acid sequence.
Proteins with a similar structure can have different functions.
Proteins with a similar structure can have similar functions. - ANSWERProteins with
different structures can have similar functions.
Which of the following processes are driven by the hydrophobic effect?
Dissolving sodium chloride in water
Separation of oil and water
Sequestration of hydrophobic groups to the interior of a folded protein
Melting of ice - ANSWERSeparation of oil and water
Sequestration of hydrophobic groups to the interior of a folded protein
ANSWERS(RATED A+)
Identify the four building block biomolecules from the list to the right, and then match
them with the best description of their primary cellular function.
cell membranes
enzyme catalysis
neurotransmission
cell recognition - ANSWERcell membranes: fatty acids
enzyme catalysis: nucleotides
neurotransmission: amino acids
cell recognition: simple sugars
Two proteins have the same overall fold, but different amino acid sequences. These
proteins likely derived from a common ancestor.
True
False - ANSWERTrue
The reaction below is a step in glycolysis where a 6-carbon sugar (F-1,6-BP) is cleaved
into 2 3-carbon compounds (DHAP and GAP).
Fructose 1,6-bisphosphate (F-1,6-BP) ↔ DHAP + GAP ΔG°' = +23.9 kJ/mol
If under cellular conditions the sign of ΔG for this reaction is negative, the reaction
would proceed spontaneously in the forward direction (F-1,6-BP → DHAP + GAP).
True
False - ANSWERTrue
From the list below, choose THREE molecules that are examples of biological
polymers.
pyruvate
DNA
alcohol dehydrogenase
monosaccharide
, cyanobacteria
fatty acid
glycogen
glycolysis - ANSWERDNA
Alcohol dehydrogenase
glycogen
Limonene is a nonpolar molecule. The water molecules around it forms
hydrogen bonds with itself and entropy decreases.
ionic bonds with itself and the entropy decreases.
The majority of heterotrophs on Earth do not use aerobic respiration as a form of energy
conversion. - ANSWERHeterotrophs are dependent on autotrophs to generate O2 from
H2O in order to support aerobic respiration.
Heterotrophs depend on autotrophs for conversion of light energy to chemical energy.
The majority of autotrophs on Earth require aerobic respiration in order to survive.
The figure below shows two different transcription factors. Which of the following
statements describes these two proteins?
Proteins with different structures can have similar functions.
Protein structure is not determined by its amino acid sequence.
Proteins with a similar structure can have different functions.
Proteins with a similar structure can have similar functions. - ANSWERProteins with
different structures can have similar functions.
Which of the following processes are driven by the hydrophobic effect?
Dissolving sodium chloride in water
Separation of oil and water
Sequestration of hydrophobic groups to the interior of a folded protein
Melting of ice - ANSWERSeparation of oil and water
Sequestration of hydrophobic groups to the interior of a folded protein
