객관식
The protein that binds to the operator of the lac operon to prevent transcription is encoded by which gene?
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15. Central Dogma & Gene Regulation
The Lac Operon
5:14분문제 8
교과서 질문
Use the following choices to answer the question:
a. Catabolite repression
b. DNA polymerase
c. Induction
d. Repression
e. Translation
The mechanism by which lactose controls the lac operon.
검증된 단계별 안내1
Step 1: Understand the lac operon system, which is a set of genes involved in the metabolism of lactose in bacteria such as Escherichia coli.
Step 2: Recognize that the lac operon is regulated by the presence or absence of lactose, which acts as an inducer molecule.
Step 3: Identify that when lactose is present, it binds to the repressor protein, causing a conformational change that prevents the repressor from binding to the operator region of the operon.
Step 4: This removal of the repressor from the operator allows RNA polymerase to transcribe the genes needed for lactose metabolism, a process known as induction.
Step 5: Therefore, the mechanism by which lactose controls the lac operon is best described by the term 'induction' from the given choices.
비슷한 문제에 대한 검증된 영상 답변:이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
5m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Induction
Induction is a regulatory mechanism where the presence of a specific molecule, such as lactose, triggers the expression of certain genes. In the lac operon, lactose acts as an inducer by binding to the repressor protein, causing it to release from the operator and allowing transcription to proceed.
추천 영상:
02:52
Introduction to Bacterial Plasmids
Lac Operon Structure and Function
The lac operon is a set of genes involved in lactose metabolism in bacteria. It includes structural genes, a promoter, an operator, and a repressor gene. The operon is regulated to ensure that enzymes for lactose breakdown are produced only when lactose is available.
추천 영상:
07:06The Lac Operon
Repression
Repression is a gene regulation mechanism where a repressor protein binds to the operator region of an operon, blocking RNA polymerase and preventing transcription. In the absence of lactose, the lac repressor binds to the operator, inhibiting expression of the lac operon genes.
추천 영상:
03:42Repressible Operons
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