UAS Prak. PBF 1

Quiz
•
Other
•
University
•
Easy
Mentarry Bafadal
Used 2+ times
FREE Resource
8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
senyawa radikal yang dapat digunakan sebagai indikator proses reduksi senyawa antioksidan adalah …
DPPH
Vitamin C
Tanin
Flavonoid
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
DPPH merupakan singkatan dari…
2,2 difenil-1-pikrilhidrazil
2-difenil – 1 – pikrilhidrazil
Difenil pikrilhidrazil
2 - Difenil pikrilhidrazil
3.
OPEN ENDED QUESTION
3 mins • 1 pt
Penentuan Panjang Gelombang Serapan Maksimum DPPH
Dipipet sebanyak 2 mL larutan DPPH 0,004 % dan ditambahkan dengan 2 mL …....*. Setelah dibiarkan selama 30 menit di tempat gelap serapan larutan diukur dengan ...…..* pada panjang gelombang ……… * untuk mendapatkan panjang gelombang maksimum.
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4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kontrol positif yang digunakan saat praktikum pengujian antioksidan adalah
Vitamin C
quercetin
DPPH
kurkumin
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Konsentrasi DPPH yang digunakan saat praktikum pengujian antioksidan adalah......
40 ppm
45 ppm
50 ppm
55 ppm
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
senyawa kimia yang dapat menyumbangkan satu atau lebih elektron kepada radikal bebas, sehingga radikal bebas tersebut dapat diredam disebut...........
antioksidan
antibakteri
radikal bebas
oksidasi
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nilai antioksidan dianalisis dengan persamaan ….
Regresi linear
SPSS
Absorbansi
Persen Penghambatan
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
IC50 merupakan konsentrasi senyawa antioksidan yang dibutuhkan untuk menagkal radikal bebas DPPH sebanyak …….
20%
30%
40%
50%
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