PHYS 261 Midterm Study Questions 2026 – Physics Exam Prep & Practice Questions

Phys,./261,./Midterm,./Study,./Questions


Which,./can,./serve,./as,./substrates,./for,./ATP,./production?,./-,./correct,./answer,./
✔ ✔ glucose,,./amino,./acids,,./fatty,./acids



Activation,./energy,./is,./-,./correct,./answer,./✔ ✔
energy,./needed,./to,./start,./a,./reaction



Enzymes,./increase,./reaction,./rate,./by,./-,./correct,./answer,./✔ ✔
lowering,./the,./activation,./energy,./of,./the,./reaction


A,./competitive,./inhibitor,./binds,./to,./-,./correct,./answer,./✔ ✔
the,./active,./site,./of,./the,./enzyme


After,./forming,./a,./complex,./with,./the,./ribosome,,./mRNA,./interacts,./with,./a,./th
ird,./molecule.,./This,./molecule,./is,./called,./-,./correct,./answer,./✔ ✔ tRNA


An,./enzyme,./that,./adds,./or,./subtracts,./water,./molecules,./is,./a,./-
,./correct,./answer,./✔ ✔ Hydrolase



Information,./stored,./in,./the,./genes,./is,./translated,./into,./-,./correct,./answer,./✔
✔ Ribosomes

,When,./an,./enzyme,./'s,./activity,./is,./inactivated,./by,./heat,./or,./a,./change,./in,./PH,,./t
he,./enzyme,./is,./said,./to,./be,./-,./correct,./answer,./✔ ✔ denatured


An,./enzyme,./that,./transfers,./phosphates,./from,./ATP,./to,./substrate,./molecule,./i
s,./a,./-,./correct,./answer,./✔ ✔ Protein,./kinase


The,./reactions,./of,./glycolysis,./occur,./in,./the,./cell's,./________;,./the,./reactions,./
of,./the,./citric,./acid,./cycle,./occur,./in,./___________.,./-,./correct,./answer,./✔ ✔
cytoplasm,,./mitochondria


End,./product,./inhibition/Feedback,./inhibition,./describes,./the,./process,./wher
eby,./increasing,./amounts,./of,./_______,./reduce,./activity,./of,./the,./enzyme.,./-
,./correct,./answer,./✔ ✔ Product


When,./indirect,./form,./of,./energy,./is,./released,./during,./reactions,,./it,./is,./tempor
arily,./trapped,./in,./energy,./carrying,./molecules,./called,./coenzymes.,./Which,./o
f,./the,./following,./is,./a,./coenzyme?,./-,./correct,./answer,./✔ ✔


In,./the,./aerobic,./metabolism,./of,./glucose,_________,./acts,./as,./the,./final,./acce
ptor,./of,./electrons.,./-,./correct,./answer,./✔ ✔ Oxygen

,ATP,./synthase,./transfers,./the,./stored,./energy,./of,./the,./H+,./ions,./to,./the,./high-
energy,./phosphate,./bond,./of,./________,./to,./form________.,./-
,./correct,./answer,./✔ ✔


The,./TAC,./sequence,./of,./DNA,./is,./the,./________,./of,./a,./coding,./sequence,./tha
t,./is,./preceded,./by,./the,./__________,./that,./regulates,./transcription.,./-
,./correct,./answer,./✔ ✔ Start,,./promoter,./region


All,./of,./the,./triplet,./codons,./needed,./to,./Geneproduce,./one,./functional,./piece,./
of,./RNA,./are,./found,./in,./one,./-,./correct,./answer,./✔ ✔ Gene



An,./allosteric,./modulator,./binds,./to,./-,./correct,./answer,./✔ ✔
a,./site,./other,./than,./the,./active,./site


The,./process,./of,./forming,./mRNA,./is,./called,./-,./correct,./answer,./✔ ✔
transcription


The,./enzymes,./that,./synthesize,./mRNA,./from,./DNA,./template,./are,./called,./-
,./correct,./answer,./✔ ✔ RNA,./polymerase.


The,./tRNA,./molecule,./contains,./the,./three,./base,./sequence,./that,./allows,./it,./to,./
bind,./to,./the,./mRNA,./is,./called,./the,./-,./correct,./answer,./✔ ✔

, The,./enzyme,./in,./the,./ETC,./that,./captures,./the,./energy,./of,./moving,./H+,./ions,./a
nd,./converts,./it,./to,./ATP,./is,./called,./-,./correct,./answer,./✔ ✔



Inside,./the,./matrix,./of,./the,./mitchondria,,./pyruvate,./-,./correct,./answer,./✔ ✔
pantothenic,./acid


The,./mRNA,./sequence,./CAU,./will,./bind,./to,./the,./tRNA,./sequence,./-
,./correct,./answer,./✔ ✔ GUA



Transcription,./occurs,./in,./the,./-,./correct,./answer,./✔ ✔ nucleus


Once,./synthesized,,./the,./________,./of,./mRNA,./are,./removed,./through,./____
____,,./which,./results,./in,./the,./formation,./of,./the,./coding,./sequence,./of,./a,./prote
in.,./-,./correct,./answer,./✔ ✔ introns,,./alternative,./splicing


A,./red,./blood,./cell,./lacks,./a,./mitochondria,,./therefore,./it,./has,./to,./obtain,./the,./A
TP,./form,./which,./of,./the,./following,./pathway?,./-,./correct,./answer,./✔ ✔


How,./would,./the,./lack,./of,./a,./required,./cofactor,./for,./an,./enzyme,./affect,./that,./e
nzymes,./function?,./-,./correct,./answer,./✔ ✔
The,./enzyme,./would,./not,./be,./able,./to,./function.