Bio 172 Exam I Practice Questions with
correct Answers
Which /of /the /following /is /part /of /cell /theory?
A. /All /cells /have /phospholipid /bilayers /surrounding /their /nucleus
B. /Unicellular /organisms /can /spontaneously /arise
C. /Most /organisms /are /multicellular
D. /All /cells /contain /DNA /- /correct /answers✔✔ /D. /All /cells /contain /DNA
If /a /cell /had /a /defect /in /topoisomerase, /which /of /the /following /would /you /expect?
A. /Both /leading /and /lagging /strand /synthesis /would /stop /during /elongation
B. /Translation /in /eukaryotes /would /immediately /halt
C. /DNA /replication /could /not /begin
D. /Most /genes /could /not /be /transcribed
E.
/Only
/leading
/strand
/synthesis
/would
/stop
/during
/elongation /-
/correct
/answers✔✔ /A. /Both /leading /and /lagging /strand /synthesis /would /stop /during /elongation
C.
/DNA
/replication /could /not /begin /(there /is /also /an /argument /that /it's /really /helicase /that /acts /first)
,When
/cytosine
/makes /
a
/base
/pair,
/three
/hydrogen
/bonds
/are
/formed. /When /adenine /makes /a /base /pair, /2 /hydrogen /bonds /are /formed. /In /a /DNA /molecule
/that /contains /8 /total /base /pairs, /three /of /which /are /guanine /bases, /how /many /total /hydrogen
/bonds /would /be /holding /the /2 /strands /of /DNA /together?
A. /16
B. /19
C. /9
D. /0 /- /correct /answers✔✔ /B. /19
Which /of /the /following /is /FALSE /regarding /protein /structure?
A.
/Denaturation
/destroys /the /tertiary /structure /of /a /protein /and /leaves /it /in /its /primary /structure
B. /Secondary /structure /is /characterized /by /hydrogen /bonding /between /R /groups
C.
/Quaternary
/structure /is /characterized /by /bonding /of /R /groups /between /different /polypeptides
D.
/Peptide
/bonds
/are
/polar
/covalent
,/bonds
/involved
/in
/primary
/structure /-
/correct
/answers✔✔ /B. /Secondary /structure /is /characterized /by /hydrogen /bonding /between /R /groups
also /technically /A /isn't /totally /true
A /hypothesis /is
A. /as /good /as /a /law
B. /an /observation
C. /an /overarching /explanation /for /a /process
D. /a /testable /statement
E. /a /descriptive /generalization /- /correct /answers✔✔ /D. /a /testable /statement
Which /of /the /following /is /FALSE /about /RNA /polymerase?
A. /It /catalyzes /the /formation /of /phosphodiester /bonds
B. /It /only /transcribes /exons
C. /It /only /transcribes /one /of /the /two /DNA /strands /for /any /particular /gene
D.
/It
/does
/NOT /require /a /primer /to /begin /synthesis /- /correct /answers✔✔ /B. /It /only /transcribes /exons
An
/enzyme
/catalyst
/can /promote /product /formation /during /a /chemical /reaction /by /all /of /the /following /EXCEPT
A. /Providing /the /energy /needed /to /get /the /reaction /going
, B. /Lowering /the /activation /energy /of /the /reaction
C. /Stabilizing /the /transition /state
D.
/Bringing
/substrates
/close
/together /- /correct /answers✔✔ /A. /Providing /the /energy /needed /to /get /the /reaction /going
Which /of /the /following /is /TRUE /of /translation?
A. /Anticodons /bind /to /codons /covalently
B. /Ribosomes /move /along /the /mRNA /in /the /5' /to /3' /direction
C. /Translation /is /terminated /when /a /release /factor /binds /to /the /P /site /of /the /ribosome
D.
/The /first /tRNA /charged /with /met /binds /to /the /A /site /of /the /ribosome /- /correct /answers✔✔ /B.
/Ribosomes /move /along /the /mRNA /in /the /5' /to /3' /direction
Which /of /the /following /statements /is /true /concerning /a /property /of /water?
A.
/Water
/has /
a
/low
/specific
/heat
/index
/therefore
/water /only /needs /a /small /input /of /energy /to /cause /a /dramatic /change /in /temperature
B.
/Water
/has /
a
/high
correct Answers
Which /of /the /following /is /part /of /cell /theory?
A. /All /cells /have /phospholipid /bilayers /surrounding /their /nucleus
B. /Unicellular /organisms /can /spontaneously /arise
C. /Most /organisms /are /multicellular
D. /All /cells /contain /DNA /- /correct /answers✔✔ /D. /All /cells /contain /DNA
If /a /cell /had /a /defect /in /topoisomerase, /which /of /the /following /would /you /expect?
A. /Both /leading /and /lagging /strand /synthesis /would /stop /during /elongation
B. /Translation /in /eukaryotes /would /immediately /halt
C. /DNA /replication /could /not /begin
D. /Most /genes /could /not /be /transcribed
E.
/Only
/leading
/strand
/synthesis
/would
/stop
/during
/elongation /-
/correct
/answers✔✔ /A. /Both /leading /and /lagging /strand /synthesis /would /stop /during /elongation
C.
/DNA
/replication /could /not /begin /(there /is /also /an /argument /that /it's /really /helicase /that /acts /first)
,When
/cytosine
/makes /
a
/base
/pair,
/three
/hydrogen
/bonds
/are
/formed. /When /adenine /makes /a /base /pair, /2 /hydrogen /bonds /are /formed. /In /a /DNA /molecule
/that /contains /8 /total /base /pairs, /three /of /which /are /guanine /bases, /how /many /total /hydrogen
/bonds /would /be /holding /the /2 /strands /of /DNA /together?
A. /16
B. /19
C. /9
D. /0 /- /correct /answers✔✔ /B. /19
Which /of /the /following /is /FALSE /regarding /protein /structure?
A.
/Denaturation
/destroys /the /tertiary /structure /of /a /protein /and /leaves /it /in /its /primary /structure
B. /Secondary /structure /is /characterized /by /hydrogen /bonding /between /R /groups
C.
/Quaternary
/structure /is /characterized /by /bonding /of /R /groups /between /different /polypeptides
D.
/Peptide
/bonds
/are
/polar
/covalent
,/bonds
/involved
/in
/primary
/structure /-
/correct
/answers✔✔ /B. /Secondary /structure /is /characterized /by /hydrogen /bonding /between /R /groups
also /technically /A /isn't /totally /true
A /hypothesis /is
A. /as /good /as /a /law
B. /an /observation
C. /an /overarching /explanation /for /a /process
D. /a /testable /statement
E. /a /descriptive /generalization /- /correct /answers✔✔ /D. /a /testable /statement
Which /of /the /following /is /FALSE /about /RNA /polymerase?
A. /It /catalyzes /the /formation /of /phosphodiester /bonds
B. /It /only /transcribes /exons
C. /It /only /transcribes /one /of /the /two /DNA /strands /for /any /particular /gene
D.
/It
/does
/NOT /require /a /primer /to /begin /synthesis /- /correct /answers✔✔ /B. /It /only /transcribes /exons
An
/enzyme
/catalyst
/can /promote /product /formation /during /a /chemical /reaction /by /all /of /the /following /EXCEPT
A. /Providing /the /energy /needed /to /get /the /reaction /going
, B. /Lowering /the /activation /energy /of /the /reaction
C. /Stabilizing /the /transition /state
D.
/Bringing
/substrates
/close
/together /- /correct /answers✔✔ /A. /Providing /the /energy /needed /to /get /the /reaction /going
Which /of /the /following /is /TRUE /of /translation?
A. /Anticodons /bind /to /codons /covalently
B. /Ribosomes /move /along /the /mRNA /in /the /5' /to /3' /direction
C. /Translation /is /terminated /when /a /release /factor /binds /to /the /P /site /of /the /ribosome
D.
/The /first /tRNA /charged /with /met /binds /to /the /A /site /of /the /ribosome /- /correct /answers✔✔ /B.
/Ribosomes /move /along /the /mRNA /in /the /5' /to /3' /direction
Which /of /the /following /statements /is /true /concerning /a /property /of /water?
A.
/Water
/has /
a
/low
/specific
/heat
/index
/therefore
/water /only /needs /a /small /input /of /energy /to /cause /a /dramatic /change /in /temperature
B.
/Water
/has /
a
/high
