.png){kind=logo}
BIOLl 1107l Examl 3l –l Principlesl ofl Biologyl Il (Latestl 2026/l 2027l Update)l Review|l 100%l Verifiedl Questionsl &l Answersl |l Gradel A
Q:l Whatl isl thel mitoticl spindle?
Answer:
Anl apparatusl ofl microtubulesl thatl controlsl chromosomesl movementl duringl mitosis
Q:l Whatl occursl inl prophase?
Answer:
Thel assemblyl ofl spindlel microtubulesl beginl inl thel centrosome.
Q:l aster
Answer:
Al radiall arrayl ofl shortl microtubulesl thatl extendsl froml eachl centrosomel towardl thel plasmal membranel inl anl animall celll undergoingl mitosis.
Q:l Centrosome
Answer:
microtubulel organizingl centerl thatl containsl al pairl ofl centriolesl (MTOC)
Q:l Whatl happensl duringl prometaphase?
Answer: 1 / 4
spindlel microtubulesl attachl tol thel kinetochoresl ofl chromosomesl andl beginl tol movel thel chromosomes
Q:l Whatl happensl duringl metaphase?
Answer:
Chromosomesl linel upl inl thel middlel ofl thel celll betweenl thel polesl ofl thel spindlel microtubules.(metaphasel plate)
Q:l Whatl happensl duringl anaphase?
Answer:
Thel sisterl chromatidsl separatel andl movel alongl thel kinetochorel microtubulesl towardl thel oppositel endsl ofl thel cell.l Thel microtubulesl shortenl byl depolymerizingl atl theirl kinetochorel ends.l Non-kinetochorel microtubulesl froml oppositel polesl overlapl andl pushl againstl eachl otherl tol elongate.
Q:l Whatl happensl duringl telophase?
Answer:
geneticallyl identicall daughterl nucleil forml atl oppositel endsl ofl thel cell
Q:l Howl doesl cytokinesisl occurl inl animall cells?
Answer:
Cleavage:l whenl al cleavagel furrowl formsl inl thel plasmal membrane
Q:l Howl doesl cytokinesisl occurl inl plantl cells?
Answer:
Al celll platel formsl froml Golgil vesiclesl (membrane)l duringl cytokinesis
- / 4
Q:l Howl dol prokaryotesl reproduce?
Answer:
binaryl fission
Q:l Whatl occursl duringl binaryl fission?
Answer:
Chromosomesl replicatel atl originl ofl replicationl andl 2l chromosomesl pulll apart
Q:l Howl didl binaryl fissionl evolvel froml mitosis?
Answer:
Prokaryotesl evolvedl beforel eukaryotes.
Q:l Whatl doesl differencesl inl regulationl atl thel molecularl levell resultl in?
Answer:
Differencesl inl celll cycle
Q:l Whatl isl thel celll cyclel drivenl by?
Answer:
specificl chemicall signalsl presentl inl thel cytoplasm
Q:l Howl doesl al celll reachl thel G0l phase?
Answer:
Byl notl receivingl al "gol ahead"l signall duringl thel G1l phase.
Q:l Whatl arel thel twol proteinsl thatl regulatel thel celll cycle? 3 / 4
Answer:
Cyclinsl andl cyclin-dependentl kinasesl (CDKS)
Q:l Maturationl Promotingl Factorl (MPF)
Answer:
al cyclin-Cdkl complexl thatl triggersl al cell'sl passagel pastl thel G2l checkpointl intol thel Ml phase
Q:l Examplel ofl externall signals
Answer:
Growthl factors
Q:l Densityl dependentl inhibition
Answer:
Anl externall signall thatl causesl cellsl tol stopl dividing.
Q:l Anchoragel dpendence
Answer:
Whenl al celll mustl bel attachedl tol al substratuml tol divide.
Q:l Whatl don'tl cancerl cellsl do?
Answer:
Respondl tol thel body'sl controll mechanismsl (density-dependentl inhibitionl orl Anchoragel dependence)
- / 4
.png)