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This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Bioinformatics knowledge and support exam preparation. Choose a topic below to get started.
1. |
DNA is methylated at |
A. | AC sequences |
B. | TATA sequences |
C. | CAAT sequences |
D. | CG sequences |
Answer» E. | |
2. |
In the presence of tryptophan in the cell, the repressor is __________ |
A. | bound to tryptophan |
B. | bound to DNA |
C. | bound to both DNA and tryptophan |
D. | bound to neither tryptophan nor DNA |
Answer» D. bound to neither tryptophan nor DNA | |
3. |
The TATA box is often used as an indicator of the presence of a promoter. |
A. | True |
B. | False |
Answer» B. False | |
4. |
Eukaryotic RNA polymerase II does not directly bind to the promoter, but relies on a dozen or more transcription factors to recognize and bind to the promoter in a specific order before its own binding around the promoter. |
A. | True |
B. | False |
Answer» B. False | |
5. |
In eukaryotes, genes often form an operon with a shared promoter. |
A. | True |
B. | False |
Answer» B. False | |
6. |
The upstream sequence where the σ protein binds constitutes the promoter sequence. |
A. | True |
B. | False |
Answer» B. False | |
7. |
THE_TATA_BOX_IS_OFTEN_USED_AS_AN_INDICATOR_OF_THE_PRESENCE_OF_A_PROMOTER.?$ |
A. | True |
B. | False |
Answer» B. False | |
8. |
EUKARYOTIC_RNA_POLYMERASE_II_DOES_NOT_DIRECTLY_BIND_TO_THE_PROMOTER,_BUT_RELIES_ON_A_DOZEN_OR_MORE_TRANSCRIPTION_FACTORS_TO_RECOGNIZE_AND_BIND_TO_THE_PROMOTER_IN_A_SPECIFIC_ORDER_BEFORE_ITS_OWN_BINDING_AROUND_THE_PROMOTER.?$ |
A. | True |
B. | False |
Answer» B. False | |
9. |
In eukaryotes, genes often form an operon with a shared promoter? |
A. | True |
B. | False |
Answer» B. False | |
10. |
In eukaryotes, gene expression is not regulated by a protein complex formed between transcription factors and RNA polymerase. |
A. | True |
B. | False |
Answer» C. | |
11. |
The specific DNA sequences to which the transcription factors bind are referred to as _____ |
A. | replication elements |
B. | blocking factors |
C. | transcription factors |
D. | regulatory elements |
Answer» E. | |
12. |
In addition to the RNA polymerase, there are also a number of DNA-binding proteins that facilitate the process of transcription. |
A. | True |
B. | False |
Answer» B. False | |
13. |
The promoter sequence may determine the expression of one gene or a number of linked genes downstream. |
A. | True |
B. | False |
Answer» B. False | |
14. |
The upstream sequence where the σ protein binds constitutes the promoter sequence.$ |
A. | True |
B. | False |
Answer» B. False | |
15. |
In bacteria, transcription is initiated by DNA polymerase. |
A. | True |
B. | False |
Answer» C. | |