Gene expression is how our DNA’s instructions turn into something useful, like a protein. It’s like a carefully planned operation that helps a cell adapt to its surroundings. When genes express themselves, they use the DNA’s code to create a protein. This process reflects an organism’s genetic traits in its appearance. It’s like genes telling the cell how to make proteins.
Regulation of Gene Expression in Eukaryotes MCQ for NEET
Ques 1. Seemingly, the vertebrate cells contain a protein which binds to clusters of 5-methylcytosine ensuring that the bound gene stays in the “off” position. This regulation on the role of gene regulation is an outcome of
1. Methylation
2. operator suppression
3. Enhancer expression
4. Translation
Answer: Methylation
Ques 2. Regulatory proteins turn transcription off through binding to a site rapidly at the front of the promoter and many times even overlaps the promoter, this site is the
1. suppressor site
2. operator site
3. regulatory site
4. transcriptional control site
Answer: Operator Site
Ques 3. All regulatory proteins possess a common DNA binding motif that is specific flexes in their protein chains permitting them to interlock with
1. the outside groove of DNA helix
2. the minor groove of DNA helix
3. the major groove of DNA helix
4. the inner groove of DNA helix
Answer: the major groove of DNA helix
Ques 4. A genomic DNA possesses functioning units, a group of genes under the influence of promoters known as
1. genes
2. operons
3. codon
4. anticodon
Answer: operons
Answer: operons
Ques 5. Eukaryotic entities
1. transcription takes place in the nucleus and translation in the cytoplasm
2. have only operons assisting in gene expression
3. in the presence of a cAMP molecule, it carries out protein synthesis
4. transcription occurs in the cytoplasm and translation in nucleus
Answer: transcription takes place in the nucleus and translation in the cytoplasm
Ques 6. There are these many histones in the core of a nucleosome
1. 8
2. 6
3. 4
4. 2
Answer: 8
Ques 7. Basic tools of genetic regulation are the ability of some proteins to bind to specific
1. promoter portions of genes
2. regulatory RNA sequences
3. enzymes of cells
4. regulatory DNA sequences
Answer: regulatory DNA sequences
Ques 8. In eukaryotes and bacteria, the most common form of regulation is
1. promoter control
2. transcriptional control
3. repressor control
4. translation control
Answer: transcriptional control
Ques 9. The transcriptional gene control in eukaryotes is mediated by
1. metabolites that bind to the cis-acting elements
2. repressor proteins that bind to operator sites
3. trans-acting factors binding to cis-acting elements
4. trans-acting factors failing to bind to cis-acting elements
Answer: trans-acting factors binding to cis-acting elements
Ques 10. In the regulation of gene expression, this is an incorrect statement
1. in the bacteria, it permits to replicate with no control
2. in the bacteria, it permits to adapt to changing environments
3. permits the functioning of multicellular entities on the whole
4. permits the maintenance of homeostasis in multicellular entities
Answer: in the bacteria, it permits to replicate with no control
