
Aminoacizi
Authored by DOINIŢA PĂDURARU
Chemistry
11th Grade
Used 8+ times

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9 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Din categoria hidroxiaminoacizilor fac parte:
lisina
serina
cisteina
acidul 2-amino-3-hidroxipropanoic
2.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Care dintre urmatoarele afirmatii sunt incorecte?
glicocolul este optic activ;
lisina are 5 atomi de C în molecula;
acidul glutamic este acidul aminosuccinic;
din glicina si alanina se obtin 2 dipeptide simple si o dipeptida mixta;
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Aminoacizii au urmatoarele proprietati fizice:
sunt substante lichide sau solide;
au punctele de topire foarte ridicate;
sunt greu solubili în apa si usor solubili în solvenți organici;
sunt substante solide
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Cate tripeptide mixte izomere se pot obtine prin reactia dintre a-alanina, valina si serina (fara stereoizomeri)
4;
6;
8
3
5.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Grupa -COOH din structura aminoacizilor poate forma:
saruri cu bazele;
esteri cu aminele;
esteri cu alcoolii;
saruri cu acizii minerali;
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Grupa amino din aminoacizi reactioneaza cu:
acidul clorhidric;
iodura de metil;
acidul cianhidric;
clorura de benzoil
7.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Compusul ala-ala-ala:
este o tripeptida mixta;
contine 2 legaturi peptidice;
este o tripeptida simpla;
contine o grupa amino libera.
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