E) All of the answers are correct - D) mitochondria, endoplasmic reticulum,
peroxisomes
The three-dimensional structure of macromolecules is formed and maintained
primarily through noncovalent interactions. Which one of the following is NOT
considered a noncovalent interaction?
A) carbon-carbon bonds
B) hydrogen bonds
C) hydrophobic interactions
D) ionic interactions
E) van der Waals interaction - A) carbon-carbon bonds
The four covalent bonds in methane (CH4) are arranged around carbon to give
which geometry?
,A) linear
B) tetrahedral
C) trigonal bipyramidal
D) trigonal planar
E) trigonal pyramidal - B) tetrahedral
The macromolecules that serve in the storage and transmission of genetic
information are:
A) carbohydrates.
B) lipids.
C) membranes.
D) nucleic acids.
E) proteins. - D) nucleic acids.
The catalog of all proteins functioning in a cell is the:
A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome - D) proteome.
, The enzyme fumarase catalyzes the reversible hydration of fumaric acid to l-
malate, but it will not catalyze the hydration of maleic acid, the cis isomer of
fumaric acid. This is an example of:
A) biological activity.
B) chiral activity.
C) racemization.
D) stereoisomerization.
E) stereospecificity - E) stereospecificity
If heat energy is absorbed by the system during a chemical reaction, the reaction
is said to be:
A) at equilibrium.
B) endergonic.
C) endothermic.
D) exergonic.
E) exothermic. - C) endothermic.
The major carrier of chemical energy in all cells is:
A) acetyl triphosphate.
B) adenosine monophosphate.
C) adenosine triphosphate.
D) cytosine tetraphosphate.
E) uridine diphosphate. - C) adenosine triphosphate.
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