
Rakutsükkel
Authored by Kadri K
Biology
10th Grade
Used 1+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kui inimese naharakus on 46 kromosoomi, siis kui palju kromosoome on naharakkude jagunemisel tekkivates tütarrakkudes?
92 kromosoomi
46 kromosoomi
23 kromosoomi
2 paari kromosoomi
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kas väide on tõene või väär? Tavaliselt moodustub rakutsüklist üle 90% mitoos.
Tõene
Väär
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Rakutsükkel koosneb interfaasist ja ...
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Interfaasis ehk jagunemistevahelises ajal on raku elutegevuse seisukohalt kõige aktiivsem aeg. Nt toimuvad siis raku ainevahetuse põhiprotsessid, suureneb rakuorganellide arv ja ka DNA replikatsioon ehk ...
kahekordistumine
pooldumine
jagunemine
lagunemine
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Uued rakud saavad tekkida vaid olemasolevate ... jagunemise teel.
6.
MULTIPLE SELECT QUESTION
45 sec • 2 pts
Märgi ära õiged väited rakutsükli kohta.
Kõikide rakkude rakutsükkel on ühepikkune.
Interfaas koosneb raku kasvamise, DNA replikatsiooni ja mitoosi ettevalmistuse perioodist.
Interfaas tähendab raku jaoks n-ö puhkamise aega.
Tsütokinees on tsütoplasma ja rakuorganellide jagunemine.
Karüokinees on tsütoplasma ja rakuorganellide jagunemine.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Miks peab DNA enne raku jagunemist kahekordistuma?
Sest rakujagunemisel läheb suur hulk DNA-d kaotsi.
Et tütarrakkude DNA oleks võimalikult erinev.
Et tütarrakkudes säiliks eellasrakuga sama palju DNA-d.
Et vähendada vigade esinemist replikatsioonil.
Et tütarrakkudel oleks rohkem geene kui eellasrakul.
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