Cancer cell activity can be monitored using a PET scanner and isotopes. When an individual consumes glucose containing carbon-11, the PET scanner shows areas where cells are rapidly growing and consuming the radioactive glucose. What is the difference between the carbon-12 atoms in your cells norma...
BIO 116 Final Exam Prep Questions and
Answers
Cancer cell activity can be monitored using a PET scanner and isotopes. When an
individual consumes glucose containing carbon-11, the PET scanner shows areas
where cells are rapidly growing and consuming the radioactive glucose. What is
the difference between the carbon-12 atoms in your cells normally and carbon-11
in the radioactive sugar?
a. Carbon-11 has one fewer electrons than carbon-12
b. Carbon-11 has one more proton than carbon-12
c. Correct! Carbon-11 has one fewer neutrons than carbon-12
d. Carbon-11 has one more electron than carbon-12
e. Carbon-11 has one fewer protons than carbon-12 - answer-✔Carbon-11 has one
fewer neutrons than carbon-12
In biological molecules, hydrogen bonds typically form between hydrogen and
a. oxygen or nitrogen
b. hydrogen or carbon
c. sulfur or phosphorus
d. calcium or iron - answer-✔oxygen or nitrogen.
Chemical X is hydrophilic and polar. That means it
a. will easily cross a biological membrane
b. will be soluble in water
c. will be soluble in water AND will easily cross a biological membrane
d. will be insoluble in water AND will easily cross a biological membrane
,e. will be insoluble in water - answer-✔will be soluble in water
If 2 atoms share electrons, a ___ bond is formed.
a. ionic
b. covalent
c. hydrogen
d. hypertonic - answer-✔covalent
Water is essential to all living cells. How does water reach cells in the leaves of a
Giant Sequoia tree?
a. The leaves absorb water through the surface of the leaf.
b. Water molecules evaporate out of the leaves. More water molecules are
transported up the tree trunk by sticking to each other and the inner surface of the
vascular tissue.
c. Active transport of water through a series of pumps.
s. Covalent bonds form between the water molecules forming a chain up the tree. -
answer-✔b. Water molecules evaporate out of the leaves. More water molecules
are transported up the tree trunk by sticking to each other and the inner surface of
the vascular tissue.
You have discovered a new species of bacteria that grows in the Bonneville Salt
Flats in Utah. What element below would likely be MOST abundant in cells of this
species?
a. sodium
b. chloride
c. phosphorus
d. iron - answer-✔phosphorus
,The pigment chlorophyll has a domain that is inserted into the thylakoid membrane
of the chloroplast, but it also has a domain that is located in the aqueous stroma.
What type of molecule is chlorophyll?
a. hydrophobic
b. hygroscopic
c. amphipathic
d. hydrophillic - answer-✔amphipathic
The physical property of cells having the greatest impact on the chemical reactions
of life is that reactions mainly take place in a/an ____ environment.
a. acidic
b. basic
c. aqueous
d. stable - answer-✔aqueous
Which of the following would be the MOST abundant in a human muscle cell?
a. sulfur
b. zinc
c. iron
d. calcium
e. sodium - answer-✔sulfur
The cell walls of bacteria are made of peptidoglycan. Like cellulose, this is an
example of a/an
a. unbranched polysaccharide
, b. unbranched polypeptide
c. unsaturated polysaccharide
d. unsaturated polypeptide - answer-✔unbranched polysaccharide
In order for a chlorine atom (Cl) to become a chloride ion (Cl-), what has to
happen?
a. chlorine loses a neutron
b. chlorine gains a neutron
c. chlorine loses an electron
d. chlorine gains an electron - answer-✔chlorine gains an electron
The ____ of a nucleotide determines whether it is a component of DNA or a
component of RNA.
a. disulfide group
b. phosphate group
c. five carbon sugar
d. alpha carbon
e. side chain - answer-✔five carbon sugar
During the Calvin Cycle, carbon atoms are covalently linked together to form
organic molecules. Based on our discussion of how biological macromolecules are
made, what type of reaction creates these covalent bonds?
a. dehydration
b. catabolic
c. spontaneous
d. hydrolysis - answer-✔dehydration
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