Modulel 1:l BIODl 102/l BIOD102l (Latestl
2025/l 2026l Update)l Essentiall Biologyl IIl
W/Labl |l Questionsl &l Answers|l Gradel A|l
100%l Correctl (Verifiedl Solutions)-l
Portagel Learning
Q:l Whatl isl al tripletl code?
Answer:
Al tripletl codel isl al non-overlappingl readingl framel inl whichl threel basesl encodel forl al
singlel aminol acid
Q:l Thel laggingl strandl mustl bel replicatedl inl al seriesl ofl fragmentsl calledl
____________.
Answer:
Okazakil fragments
Q:l Truel orl False;l Ifl false,l explainl whyl thel statementl isl false:l Selectivel degradationl
isl al forml ofl post-transcriptionl regulation.
Answer:
False;l Selectivel degradationl isl al forml ofl post-translationl regulation
Q:l Whichl modificationl tol pre-mRNAl involvesl thel additionl ofl al guaninel nucleotidel
thatl hasl beenl modifiedl byl thel attachmentl ofl phosphates?
,Answer:
5'l cap
Q:l Thel precisel sequencel ofl geneticl informationl isl calledl thel ______,l whilel
observablel characteristicsl arel collectivelyl knownl asl al ________.
Answer:
genotype;l phenotype
Q:l Whichl ofl thel followingl isl notl onel ofl thel stepsl involvedl inl thel terminationl ofl
translation?
a.l Disassemblyl ofl thel translationl initiationl complex
b.l Bindingl ofl al releasingl factor
c.l Ribosomall subunitl bindsl tol maturel mRNA
d.l Liberationl ofl completedl polypeptidel chain
Answer:
c
Q:l Duringl thel elongationl phasel ofl transcription,l inl whatl directionl doesl thel RNAl
polymerasel glidel acrossl thel DNA?
Answer:
5'l -->l 3'
Q:l Whichl enzymel untwistsl andl separatesl thel helixl parentl strandsl atl thel replicationl
fork?
, Answer:
Helicase
Q:l Whichl typel ofl RNAl isl synthesizedl froml al complementaryl DNAl strandl andl
containsl thel exactl sequencel ofl DNAl thatl dictatesl "how"l tol buildl al protein?
Answer:
mRNA
Q:l Howl dol acetylationl andl methylationl ofl histonel proteinsl actl asl anl "on"/"offl switchl
ofl transcription?
Yourl Answer:
Answer:
Acetylation,l whichl isl thel additionl ofl acetyll groupsl tol anl aminol acidl ofl thel histonel
(withinl chromatin)l tail,l flipsl thel switchl "on",l inducingl transcription.l Methylation,l whichl
isl thel additionl ofl methyll groupsl tol thel aminol acidl ofl thel histonel tail,l flipsl thel switchl
"off",l inhibitingl transcription
Q:l Germl cellsl containl al specializedl enzymel calledl ________l thatl facilitatesl thel
lengtheningl ofl telomeres.
Answer:
telomerase
Q:l Whatl cellsl ofl thel bodyl arel shieldedl froml telomerel shortening?
Answer:
2025/l 2026l Update)l Essentiall Biologyl IIl
W/Labl |l Questionsl &l Answers|l Gradel A|l
100%l Correctl (Verifiedl Solutions)-l
Portagel Learning
Q:l Whatl isl al tripletl code?
Answer:
Al tripletl codel isl al non-overlappingl readingl framel inl whichl threel basesl encodel forl al
singlel aminol acid
Q:l Thel laggingl strandl mustl bel replicatedl inl al seriesl ofl fragmentsl calledl
____________.
Answer:
Okazakil fragments
Q:l Truel orl False;l Ifl false,l explainl whyl thel statementl isl false:l Selectivel degradationl
isl al forml ofl post-transcriptionl regulation.
Answer:
False;l Selectivel degradationl isl al forml ofl post-translationl regulation
Q:l Whichl modificationl tol pre-mRNAl involvesl thel additionl ofl al guaninel nucleotidel
thatl hasl beenl modifiedl byl thel attachmentl ofl phosphates?
,Answer:
5'l cap
Q:l Thel precisel sequencel ofl geneticl informationl isl calledl thel ______,l whilel
observablel characteristicsl arel collectivelyl knownl asl al ________.
Answer:
genotype;l phenotype
Q:l Whichl ofl thel followingl isl notl onel ofl thel stepsl involvedl inl thel terminationl ofl
translation?
a.l Disassemblyl ofl thel translationl initiationl complex
b.l Bindingl ofl al releasingl factor
c.l Ribosomall subunitl bindsl tol maturel mRNA
d.l Liberationl ofl completedl polypeptidel chain
Answer:
c
Q:l Duringl thel elongationl phasel ofl transcription,l inl whatl directionl doesl thel RNAl
polymerasel glidel acrossl thel DNA?
Answer:
5'l -->l 3'
Q:l Whichl enzymel untwistsl andl separatesl thel helixl parentl strandsl atl thel replicationl
fork?
, Answer:
Helicase
Q:l Whichl typel ofl RNAl isl synthesizedl froml al complementaryl DNAl strandl andl
containsl thel exactl sequencel ofl DNAl thatl dictatesl "how"l tol buildl al protein?
Answer:
mRNA
Q:l Howl dol acetylationl andl methylationl ofl histonel proteinsl actl asl anl "on"/"offl switchl
ofl transcription?
Yourl Answer:
Answer:
Acetylation,l whichl isl thel additionl ofl acetyll groupsl tol anl aminol acidl ofl thel histonel
(withinl chromatin)l tail,l flipsl thel switchl "on",l inducingl transcription.l Methylation,l whichl
isl thel additionl ofl methyll groupsl tol thel aminol acidl ofl thel histonel tail,l flipsl thel switchl
"off",l inhibitingl transcription
Q:l Germl cellsl containl al specializedl enzymel calledl ________l thatl facilitatesl thel
lengtheningl ofl telomeres.
Answer:
telomerase
Q:l Whatl cellsl ofl thel bodyl arel shieldedl froml telomerel shortening?
Answer:
