Biology 314 Final ACTUAL EXAM REVIEW, QUESTIONS AND CORRECT
ANWERS COVERING THE MOST RE, Exams of Biology
The folding of proteins secreted outside of the cell is stabilized by: -
ANSWERdisulfide bridges
Which of the following statements is false? - ANSWERAn enzyme must have
both beta-sheets and alpha helices.
The energy required by a human cell to grow and reproduce is provided by: -
ANSWERits catabolic metabolism.
A common means of providing energy to an energetically unfavorable
reaction in a cell is by: - ANSWERcoupling of ATP hydrolysis to the reaction.
For a reaction to occur spontaneously... - ANSWERthe products must have a
lower energy than the reactants.
The membrane lipid bilayer is held together primarily by: - ANSWERrepulsion
between the phospholipid tails and water.
,A bacterium is suddenly expelled from a warm human intestine into the cold
world outside (don't ask). Which of the following adjustments might the
bacterium make to maintain the same level of membrane fluidity? -
ANSWERIncrease the proportion of unsaturated hydrocarbon tails in its
membrane phospholipids.
Which is the strongest interaction between atoms in an aqueous
environment? - ANSWERCovalent bond
Which one of the following is a common folding structure found in proteins? -
ANSWERbeta sheet
The common feature of alpha helices and beta sheets that make them
universal building blocks for proteins is: - ANSWERonly the peptide backbone
groups are engaged in hydrogen bonds.
What type pf protein separation will provide the fastest way to purify a
protein from a complex mixture? - ANSWERaffinity chromatography.
Enzymes catalyze chemical reactions by: - ANSWERdecreasing the energy of
activation of the reaction
What properties of proteins are affected by molecular crowding? -
ANSWERintermolecular associations and conformational distributions
What is Reductionism? - ANSWERThe study of complex systems by isolating
its parts
, If you want to study the detailed internal membrane structure of a
chloroplast, what kind of microscopy would be most appropriate? -
ANSWERElectron microscopy
Which statement represents the cell theory? - ANSWERAll cells are formed by
the growth and division of existing cells.
Chloroplasts are thought to have arisen by engulfment of a photosynthetic
bacterium by an ancestral eukaryotic cell. - ANSWERTrue
Oxidation reactions ... - ANSWERare always accompanied by a reduction
reaction
A hydrolysis reaction involves the cleavage of a covalent bond by the addition
of a water molecule. - ANSWERTrue
Carbon atoms cycle continuously through the biosphere. What is a by-
product of cell respiration, and what does this by-product represent? -
ANSWERCO2; completely oxidized carbon
Lysozyme lowers the activation energy for its reaction by - ANSWERCreating
strain on bonds in the bound substrate molecule
In water, hydrogen bonds can form between which of the following? -
ANSWERa hydrogen atom of one water molecule and an oxygen atom of
another
ANWERS COVERING THE MOST RE, Exams of Biology
The folding of proteins secreted outside of the cell is stabilized by: -
ANSWERdisulfide bridges
Which of the following statements is false? - ANSWERAn enzyme must have
both beta-sheets and alpha helices.
The energy required by a human cell to grow and reproduce is provided by: -
ANSWERits catabolic metabolism.
A common means of providing energy to an energetically unfavorable
reaction in a cell is by: - ANSWERcoupling of ATP hydrolysis to the reaction.
For a reaction to occur spontaneously... - ANSWERthe products must have a
lower energy than the reactants.
The membrane lipid bilayer is held together primarily by: - ANSWERrepulsion
between the phospholipid tails and water.
,A bacterium is suddenly expelled from a warm human intestine into the cold
world outside (don't ask). Which of the following adjustments might the
bacterium make to maintain the same level of membrane fluidity? -
ANSWERIncrease the proportion of unsaturated hydrocarbon tails in its
membrane phospholipids.
Which is the strongest interaction between atoms in an aqueous
environment? - ANSWERCovalent bond
Which one of the following is a common folding structure found in proteins? -
ANSWERbeta sheet
The common feature of alpha helices and beta sheets that make them
universal building blocks for proteins is: - ANSWERonly the peptide backbone
groups are engaged in hydrogen bonds.
What type pf protein separation will provide the fastest way to purify a
protein from a complex mixture? - ANSWERaffinity chromatography.
Enzymes catalyze chemical reactions by: - ANSWERdecreasing the energy of
activation of the reaction
What properties of proteins are affected by molecular crowding? -
ANSWERintermolecular associations and conformational distributions
What is Reductionism? - ANSWERThe study of complex systems by isolating
its parts
, If you want to study the detailed internal membrane structure of a
chloroplast, what kind of microscopy would be most appropriate? -
ANSWERElectron microscopy
Which statement represents the cell theory? - ANSWERAll cells are formed by
the growth and division of existing cells.
Chloroplasts are thought to have arisen by engulfment of a photosynthetic
bacterium by an ancestral eukaryotic cell. - ANSWERTrue
Oxidation reactions ... - ANSWERare always accompanied by a reduction
reaction
A hydrolysis reaction involves the cleavage of a covalent bond by the addition
of a water molecule. - ANSWERTrue
Carbon atoms cycle continuously through the biosphere. What is a by-
product of cell respiration, and what does this by-product represent? -
ANSWERCO2; completely oxidized carbon
Lysozyme lowers the activation energy for its reaction by - ANSWERCreating
strain on bonds in the bound substrate molecule
In water, hydrogen bonds can form between which of the following? -
ANSWERa hydrogen atom of one water molecule and an oxygen atom of
another
