Molecular Biology

Gene Regulation MCQs with Answers

Welcome to the Gene Regulation MCQs with Answers. In this post, we have shared Gene Regulation Online Test for different competitive exams. Find practice Gene Regulation Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Gene Regulation.

It refers to the cell’s way of controlling gene expression, which translates into time, place, and the level of gene expression in a cell. It is one mechanism which ensures genes are turned on or off only at the right time; therefore, organisms can respond to their environment and maintain homeostasis. Regulation is very important for proper cellular activity, development, and reaction to environmental stimuli.

The regulation of gene mechanisms is multi-layered-from transcriptional to post-transcriptional and even epigenetic regulation. Transcription factors-binding to specific DNA sequences close to the promoter of a gene act either as enhancers or as repressors, initiating or preventing the initiation of transcription. Thus, the outcome would be the expression or repression of a gene.

Messenger RNA is also post-transcriptionally controlled, which means the stability, splicing, and translation will be regulated according to substances called microRNAs that can bind to mRNA and degrade this mRNA or prevent it from being translated into proteins.

It is such a regulation of epigenesis that happens when changes to DNA or histone protein, like DNA methylation or histone acetylation, occur without altering the DNA sequence, through changes in chromatin structure and gene accessability. These can be long-lasting with their effect on gene expression during later cell divisions.

It also holds importance in genetics research, disease treatments, and biotechnology. It unveils lots of information about developmental processes, the biology of cancer, mechanisms by which environmental factors drive gene expression, and much more. Further exploration might unlock specific targeted therapies and precise medicine as well.

Gene Regulation Online Quiz

By presenting 3 options to choose from, Gene Regulation Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Gene Regulation Questions and Answers and click over the correct answer.

  • Test Name: Gene Regulation MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

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Gene Regulation MCQs

Gene Regulation

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1 / 40

The role of siRNAs (small interfering RNAs) is to _____.

2 / 40

Which enzyme is responsible for removing acetyl groups from histones?

3 / 40

The lac operon is an example of an inducible system, meaning that it is activated in response to _____.

4 / 40

MicroRNAs (miRNAs) regulate gene expression by _____.

5 / 40

The lac operon is activated when _____.

6 / 40

The trp operon in bacteria is an example of _____.

7 / 40

Which of the following is a function of RNA polymerase?

8 / 40

The process of DNA looping is associated with _____.

9 / 40

The process of RNA editing involves _____.

10 / 40

Transcription factors bind to _____.

11 / 40

In prokaryotes, the trp repressor protein binds to the _____.

12 / 40

Which of the following is an example of epigenetic regulation?

13 / 40

The process of RNA interference (RNAi) is triggered by the presence of _____.

14 / 40

Which of the following is NOT a post-translational modification of proteins that can regulate gene expression?

15 / 40

Which of the following is NOT a mechanism of epigenetic regulation?

16 / 40

The lac repressor protein binds to the _____.

17 / 40

In eukaryotes, DNA methylation is associated with _____.

18 / 40

In prokaryotes, the lac operon is an example of _____.

19 / 40

Which enzyme is responsible for adding methyl groups to DNA?

20 / 40

Alternative splicing is a mechanism of gene regulation that occurs during _____.

21 / 40

In eukaryotes, DNA methylation typically leads to _____.

22 / 40

Which of the following is a cis-acting regulatory element?

23 / 40

In eukaryotes, which protein complex is responsible for removing histones from DNA to allow for gene expression?

24 / 40

Which of the following statements about enhancers is true?

25 / 40

Which of the following is NOT a method of post-transcriptional control?

26 / 40

In eukaryotes, acetylation of histones generally leads to _____.

27 / 40

Which of the following is NOT a post-transcriptional mechanism of gene regulation?

28 / 40

The lac operon is turned off when _____.

29 / 40

The role of transcriptional repressors is to _____.

30 / 40

Transcriptional activators bind to _____.

31 / 40

In eukaryotes, the protein complex that assists in the assembly of the pre-initiation complex at the promoter region is called the _____.

32 / 40

In eukaryotes, enhancers are _____.

33 / 40

The process of RNA editing can result in _____.

34 / 40

The process of RNA interference (RNAi) involves _____.

35 / 40

The process of RNA splicing involves the removal of _____.

36 / 40

Which of the following is a role of RNA polymerase II?

37 / 40

In prokaryotes, which molecule binds to the trp repressor to activate transcription?

38 / 40

Gene regulation allows cells to respond to _____.

39 / 40

Which of the following is NOT a mechanism of gene regulation?

40 / 40

In eukaryotes, which of the following modifications can affect chromatin structure and gene expression?

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