
latihan soal OSCE biomol
Authored by zahra zain
Biology
University
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56 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mengapa proteinase K ditambahkan sebelum tahap pemanasan 60°C, bukan sesudahnya?
Karena butuh suhu tinggi agar aktif
Karena tidak stabil setelah DNA terlepas
Karena aktivitas optimalnya sebelum denaturasi protein
Karena hanya berfungsi di suhu dingin
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apa yang akan terjadi jika tahap pembekuan -20°C dilewati?
DNA lebih murni
Dinding sel tidak terpecah sempurna
Protein terdenaturasi
Supernatan sulit terbentuk
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada metode boiling, apa faktor utama yang menyebabkan DNA rusak bila pemanasan berlebihan?
Denaturasi enzim
Pemutusan ikatan hidrogen DNA
Penguapan buffer
Degradasi protein
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mengapa DNA hasil metode boiling kurang cocok untuk PCR kuantitatif?
Karena tanpa buffer TE
Karena tidak murni dan masih banyak inhibitor
Karena DNA terlalu encer
Karena suhu penyimpanan terlalu rendah
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jika hasil elektroforesis menunjukkan pita DNA smear (kabur), penyebab paling mungkin adalah ...
Konsentrasi gel terlalu tinggi
DNA terfragmentasi akibat lisis kasar
DNA terlalu murni
Loading dye berlebih
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Buffer GB mengandung garam chaotropik yang berfungsi untuk ...
Meningkatkan viskositas DNA
Denaturasi protein dan membantu DNA menempel di silika
Mengurangi pH buffer
Mengaktifkan enzim lisozim
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mengapa penambahan etanol dilakukan setelah buffer GB, bukan sebelumnya?
Karena DNA belum siap diendapkan sebelum lisis sempurna
Agar protein terpresipitasi terlebih dahulu
Karena etanol menurunkan aktivitas Proteinase K
Untuk menstabilkan suhu
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