
Test cl 12
Authored by Madalina Nituleac
Biology
12th Grade
Used 171+ times

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18 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
1) Copierea informației genetice de pe o catenă de ADN se realizează de către :
ARN transport
ARN ribozomal
ARN viral
ARN mesager
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
2) Renaturarea se bazează pe :
ruperea legăturilor de hidrogen
răcirea bruscă a ADN
răcirea treptată a ADN
obținerea de ADN monocatenar
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
3) Legăturile intercatenare de la nivelul acizilor nucleici :
slabe
covalente
fosfodiesterice
între două baze azotate purinice
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
4) ARN de transfer :
are structură monocatenară
acționează în citoplasmă
între cele două catene se stabilesc legături de hidrogen
este produs în nucleu
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
5) Structura primară a ADN-ului :
între cele două catene se stabilesc legături de hidrogen
este bicatenară
are stabilitate mare
între nucleotide există legături chimice puternice
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
6) Bazele azotate între care se stabilesc legături triple sunt :
adenină-guanină
guanină-citozină
adenină-timină
adenină-uracil
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
7) Adenina :
este prezentă în toate tipurile de acizi nucleici
se leagă de uracil prin trei punți de hidrogen
este o bază azotată pirimidinică
se leagă de timină prin trei punti de hidrogen
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