Regulation gene expresion
Quiz
•
Science
•
University
•
Medium
Liana sandikala
Used 2+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Apa fungsi utama dari protein regulator dalam regulasi ekspresi gen pada prokariot?
Mengaktifkan replikasi DNA secara langsung
Mengikat ribosom untuk memulai translasi
Mengatur kapan dan seberapa banyak gen ditranskripsi
Memecah enzim struktural dalam nukleus
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Protein represor dalam operon lac dihasilkan oleh gen yang disebut
3.
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1 min • 1 pt
Ketika laktosa tersedia dalam lingkungan, molekul ... akan berikatan dengan represor dan menonaktifkannya.
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Struktur DNA tempat represor berikatan untuk menghambat transkripsi disebut ...
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Enhancer adalah sekuens DNA yang berfungsi untuk ... transkripsi gen.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu percobaan menunjukkan bahwa ekspresi gen meningkat setelah perlakuan dengan histone acetyltransferase (HAT). Mengapa hal ini terjadi?
HAT menurunkan kadar RNA polimerase
Asetilasi histon membuat DNA lebih padat
Asetilasi histon membuka struktur kromatin sehingga RNA polimerase dapat bekerja
HAT mengikat enhancer dan menekan gen
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dalam operon trp, jika terjadi mutasi pada operator yang mencegah ikatan represor, apa dampak terhadap ekspresi gen?
Gen tidak akan pernah ditranskripsi
Gen akan terus ditranskripsi meskipun triptofan tersedia
RNA polimerase tidak akan mengenali promotor
Allolaktosa akan menginhibisi operator
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