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NWHSU Histology Exam 1 Review Questions and Answers
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NWHSU Histology Exam 1 ReviewQuestions and Answers
Chromatin iifunction: ii- iiAnswers ii-Synthesis iiof iirRNA
Chromatin iiis iimade iiup iiof iiwhat? ii- iiAnswers ii-Double iiStranded iiDNA iiand
iinucleoproteins(Histones)
Euchromatin ii- iiAnswers ii--Vesicular iiand iileptochromatic ii
-transcriptionally iiactive iiand iielectron-lucent
Heterochromatin ii- iiAnswers ii--Condensed iiand iipachychromtic
-Transcriptionally iiinactive iiand iiwhen iistained iihas iibasophilic iiclumps
Nuclear iienvelope iiconsists iiof: ii- iiAnswers ii--2 iiparallel iimembranes ii(outer iiand iiinner
iinuclear iimembrane)
-Outer iiis iicontinuous iiwith iirER
The iithin iispace iibetween iithe iitwo iinuclear iienvelope iimembranes: ii- iiAnswers ii-
Perinuclear iicisterna
Openings iion iinuclear iienvelope ii- iiAnswers ii-nuclear iipores
The iiinner iinuclear iimembrane iion iithe iinuclear iienvelope iiis iisupported iiby: ii- iiAnswers
ii-Nuclear iiLamina
During iimitosis iiwhat iicauses iithe iidisassembly iiof iinuclear iienvelope? ii- iiAnswers ii-
Phosphorylation iiof iithe iilamin
Steps iiof iicreating iichromosomes ii- iiAnswers ii--Double iihelix iiDNA iiwound iiaround ii8
iihistone iiproteins iiassemble iiinto iinucleosomes(structural iiunit iiof iichromatin iipackaging)
ii
-these iichromatins iiare iifibrils iiwhich iifold iitogether iiwith iieach iiother iito iimake iifibers.
ii(tight iifold iiis iiheterochromatin, iiloose iifold iiis iieuchromatin)
-fibers iiwill iifurther iicondense iito iiform iichromosomes
Karyotype iicontains ii- iiAnswers ii-22 iipairs iiof iiautosomes iiand ii1 iipair iiof iisex
iichromosomes ii(XX iior iiXY)
All iisomatic iicells iihave: ii- iiAnswers ii-46 iichromosomes ii(diploid ii2n)
All iigerms iicells(after iimeiosis) iihave ii- iiAnswers ii-23 iichromosomes ii(haploid ii1n
, What iiis iiused iiin iikaryotype iianalysis iito iistop iidiving iicells? ii- iiAnswers ii-Colchicine
What iistage iiare iithe iicells iistopped iiat iiin iikaryotype iianalysis? ii- iiAnswers ii-Metaphase(
iibecause iithe iichromosomes iiare iimaximally iicondensed)
Metaphase iichromosomes iiappear iias: ii- iiAnswers ii-sister iichromatids
Trisomy iiof iithe ii21st iichromosome iiis iicalled ii- iiAnswers ii-Down iiSyndrome
Trisomy iiof iithe ii18th iichromosome iiis iicalled ii- iiAnswers ii-Edwards iiSyndrome
Trisomy iiof iithe ii13th iichromosome iiis iicalled ii- iiAnswers ii-Patau iiSyndrome
What iiis iiKleinefelter iiSyndrome? ii- iiAnswers ii-XXY iiof iithe iisex iichromosomes
What iiis iiTurner iiSyndrome? ii- iiAnswers ii-Only iihaving iian iiX iichromosome ii(X0)
A iiperson iiwith iian iiXX iikaryotype iihas iihow iimany iisex iichromatins? ii- iiAnswers ii-1
A iiperson iiwith iian iiXXXX iikaryotype iihas iihow iimany iisex iichromatins? ii- iiAnswers ii-3
A iiperson iiwith iian iiXY iikaryotype iihas iihow iimany iisex iichromatins? ii- iiAnswers ii-0
In iineutrophils iisex iichromatins iiappear iias? ii- iiAnswers ii-bar iibodies(drum iistick
iiappendage)
A iinucleotide iiis iimade iiup iiof? ii- iiAnswers ii-nitrogenous iibase ii(purine/pyrimidine),
iideoxyribose iisugar iiand iia iiphosphate iigroup
nucleosides iiare iimade iiup iiof? ii- iiAnswers ii-nitrogenous iibase(purine/pyrimidine) iiand iia
iideoxyribose iisugar
Nucleotides iiare iilinked iitogether iiby: ii- iiAnswers ii-phosphodiester iibond
Notable iipurines: ii- iiAnswers ii-Adenine(A) ii& iiGuanine(G)
Notable iiPyrimidines: ii- iiAnswers ii-Cytosine(C) ii& iiThymine(T)
The iidouble iihelix iiof iiDNA iiis iiheld iitogether iiby ii- iiAnswers ii-Hydrogen iibonding
How iimany iibonds iiare iibetween iiAdenine iiand iiThymine? ii- iiAnswers ii-2
How iimany iibonds iiare iibetween iiCytosine iiand iiGuanine? ii- iiAnswers ii-3
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