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BIO 156 Exam 1 Practice Questions Back of Book 2024-2025 Edition
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Graded A+
___ accepts electrons in alcoholic fermentation
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Oxygen
b
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Acetaldehyde
d
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Acetaldehyde
___ are always changed by participating in a reaction
...
Enzymes
b
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Reactants
d
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Reactants
___ are to proteins as ___ are to nucleic acids
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Sugars; lipids
b
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Amino acids; hydrogen bonds
d
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Amino acids; nucleotides
___ cannot diffuse across a lipid bilayer
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Water molecules
b
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Ions
d
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Ions
___ groups are the "acid" part of amino acids and fatty acids
...
Hydroxyl (-OH)
b
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Methyl (-CH3)
d
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Carboxyl (-COOH)
___ is a simple sugar (a monosaccharide)
...
Ribose
b
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Starch
d
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Ribose
___ is life's primary source of energy
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Food
b
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Sunlight
d
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Sunlight
___ is the transmission of DNA to offspring
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Reproduction
b
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Homeostasis
d
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Reproduction
___ move around for at least part of their life
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Living organisms
b
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Species
d
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Animals
A ___ can help keep the pH of a solution stable
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covalent bond
b
...
buffer
d
...
buffer
A ___ is an example of protein secondary structure
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barrel
b
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domain
d
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helix
A ___ is dissolved in a solvent
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molecule
b
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solute
d
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solute
A bacterium is ___ (choose all that apply)
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an organism
b
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an animal
d
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an organism
b
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a
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domain
c
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eukaryote
e
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producer
g
...
trait - ANSa
...
eukaryote
e
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a
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the standard against which an experimental group is compared
c
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the standard against which an
experimental group is compared
A denatured protein has lost its ___
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hydrogen bond
b
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function
d
...
All of the above
A metabolic pathway ___
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may build or break down molecules
b
...
can include redox reactions
d
...
all of the above
A molecule into which a radioisotope has been incorporated can be used as a(n) ___
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compound
b
...
salt
d
...
tracer
A molecule that donates electrons become ___, and the one that accepts the electron
becomes ___
...
reduced; oxidized
b
...
oxidized; reduced
d
...
oxidized; reduced
A plasma membrane ___
...
controls exchanges between the cell and the external environment
b
...
is a type of extracellular matrix - ANSa
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a
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H+ - ANSb
...
This is a
case of ___
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passive transport
b
...
osmosis
d
...
active transport
A(n) ___ substance repels water
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acidic
b
...
hydrophobic
d
...
hydrophobic
After the citric acid cycle reactions run ___, one six-carbon glucose molecule has been
completely broken down to CO2
...
once
b
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six times
d
...
twice
All antioxidants ___
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prevent other molecules from being oxidized
b
...
balance charge
d
...
prevent other molecules from being oxidized
All cells have these three things in common:
a
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a plasma membrane, DNA, and a nucleus
c
...
a cell wall, cytoplasm, and DNA - ANSc
...

a
...
neutron
c
...
all of the above - ANSa
...

a
...
hydrogen
c
...
nonpolar covalent - ANSc
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- ANSdomains
By sensing and responding to change, organisms keep conditions in the internal
environment within ranges that cells can tolerate
...

a
...
development
c
...
inheritance - ANSc
...

a
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adhering junctions
c
...
adhesion proteins
e
...
gap junctions - ANSa
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a
...
is the basis of traits
c
...
all of the above - ANSd
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a
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two
c
...
four - ANSd
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a
...
is free energy
c
...
is a measure of disorder - ANSd
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a
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amyloplasts
c
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peroxisomes - ANSa
...
The researchers
concluded that the average height of a student is greater than 6 feet
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a
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sampling error
c
...
experimental bias - ANSb
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a
...
mitochondrion
c
...
cytoplasm - ANSd
...

a
...
protons
c
...
all of the above - ANSd
...

a
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endergonic
c
...
both a and c - ANSa
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a
...
diffuses out of the cell
c
...
moves in by endocytosis - ANSa
...

a
...
coasting downhill
c
...
putting on the breaks - ANSc
...

a
...
mitochondrion
c
...
cytoplasm - ANSb
...

a
...
hydrogen
c
...
NADH - ANSc
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methionine-valine-proline-leucine-serine
b
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NH2-CHR-COOH
d
...
polypeptide
b
...
amino acid
d
...

a
...
charge
c
...
atomic number - ANSd
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1
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phospholipid
3
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fat
5
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cellulose
7
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lipoprotein
9
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amino acids
2
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amino acids, sugars
4
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nucleotides
6
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sugar, phosphate, base
8
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glucose, fructose
Most of the energy that aerobic respiration releases from glucose ends up in ___
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NADH
b
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heat
d
...
heat
Name one environmental factor that typically influences enzyme function
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ANSStarch, cellulose, glycogen
No animal cell has a ___
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plasma membrane
b
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lysosome
d
...
cell wall
One of the main differences between aerobic respiration and fermentation is ___
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fermentation occurs only in prokaryotic cells
b
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fermentation uses no electron transfer chains
d
...
fermentation uses no electron transfer
chains
Organic molecules consist mainly of ___ atoms
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carbon
b
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carbon and hydrogen
d
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carbon and hydrogen
Organisms require ___ and ___ to maintain themselves, grow, and reproduce
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DNA; energy
b
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nutrients; energy
d
...
nutrients; energy
Put the following pathways in the order they occur during aerobic respiration
...
electron transfer phosphorylation
b
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citric acid cycle
d
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glycolysis
b
...
citric acid cycle
a
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plasma membrane
b
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endoplasmic reticulum
d
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endoplasmic reticulum
b
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post-Golgi vesicles
a
...

a
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ionic
c
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nonpolar covalent
c
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ionic
Science only addresses that which is ___
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alive
b
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variable
d
...
observable
Solutes tend to diffuse from a region where they are ___ concentrated to an adjacent
region where they are ___ concentrated
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more; less
b
...
movement is independent of concentration - ANSa
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a
...
fatty acid tails
c
...
carbons - ANSb
...
- ANSFalse
T/F: Unlike animals, which make many ATP by aerobic respiration, plants make all of
their ATP by photosynthesis
...
- ANSFalse
...
They have double bonds that do not kink fatty acid tails, so these
molecules can pack tightly
...
building and modifying proteins and lipids
b
...
secreting extracellular matrix onto the cell surface
d
...
building and modifying proteins and
lipids
The measure of an atom's ability to pull electrons away from another atom is called ___
...
electronegativity
b
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polarity - ANSa
...

a
...
hydrogen
c
...
nonpolar covalent - ANSa
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a
...
molecule
c
...
atom
The smallest unit of life is the ___
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atom
b
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cell
d
...
cell
The surface-to-volume ratio ___
...
does not apply to prokaryotic cells
b
...
is part of the cell theory - ANSb
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a
...
have RNA but not DNA
c
...
a and c - ANSa
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- ANSDouble bonds
What atom has only one proton?
a
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an isotope
c
...
a free radical
e
...
oxygen - ANSa
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endoplasmic reticulum, an extension of the nucleus
b
...
nucleoli, in which ribosomes subunits are made
d
...
tight junctions - ANSb
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a
...
base; acid
c
...
base; buffer - ANSa
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NADH
b
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FADH2
d
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FADH2
Which of the following is a class of molecules that encompasses all of the other
molecules listed?
a
...
fatty acids
c
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steroids
e
...
phospholipids - ANSe
...
Every cell arises from another cell
...
A cell is alive even as part of a multicelled body
...
Eukaryotic cells have a nucleus, and prokaryotic cells do not
...
The cell is the smallest unit of life
...
Eukaryotic cells have a nucleus, and
prokaryotic cells do not
...
heat
b
...
PGAL
d
...
lactate
f
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oxygen
Which of the following molecules can be oxidized to produce ATP?
a
...
six-carbon sugars
c
...
complex carbohydrates
e
...
all of the above - ANSf
...
nucleus
b
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mitochondrion
d
...
Golgi body
Which of the following pathways requires molecular oxygen (O2)?
a
...
electron transfer phosphorylation in mitochondria
c
...
alcoholic fermentation - ANSb
...
Some of the fish in Lake Michigan are brown
...
None of the fish in Lake Michigan are brown
...
All of the fish in Lake Michigan are brown
...
Some of the fish in Lake Michigan
are brown
Which of the following statements is false?
a
...

b
...

c
...

d
...
- ANSa
...
Isotopes have the same atomic number and different mass numbers
...
Atoms have about the same number of electrons as protons
...
All molecules consist of atoms
...
Free radicals are dangerous because they emit energy
...
Free radicals are
dangerous because they emit energy
...
Energy cannot be created or destroyed
...
Energy cannot change from one form to another
...
Energy tends to disperse spontaneously
...
Energy cannot change from one
form to another



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