A stretch of nucleotides located a of promoter positively regulates gene express

Question

A stretch of nucleotides located a of promoter positively regulates gene expression is called as A) Start site B) Intron C) Enhancer D) Exon Typically, chromatin/nucleosomes relaxes (euchromatin) due to _____ and condenses (heterochromatin) due to A) Phosphorylation and acetylation B) Phosphorylation and methylation C) Methylation and acetylation D) Acetylation and methylation Holliday Junction is a Characteristic feature of which of the processes given below A) Replication B) Transcription C) Non Homologous recombination D) Homologues Recombination Cells that are in a non-dividing state are in which phase? A) G_0 B) G_2 C) G_1 D) S E) M

Explanation / Answer

Answers :

1.Option 'C'-Enhancer.

Explanation : an enhancer is a short (50-1500 bp) region of DNA that can be bound by proteins (activators) to increase the likelihood that transcription of a particular gene will occur.

2.option 'D'-acetylation and methylation.

Explanation :Methylated DNA is suppressive of gene expression, as it attracts methylcytosine binding proteins that promote chromatin condensation into transcriptionally repressive conformations.

3.option -'D'-homologous recombination

Explanation :The Holliday junction is a key intermediate in homologous recombination, a biological process that increases genetic diversity by shifting genes between two chromosomes, as well as site-specific recombination events involving integrases.

4.option' A'- Go phase

Explanation -The G0 phase is a period in the cell cycle in which cells exist in a quiescent state. G0 phase is viewed as either an extended G1 phase, where the cell is neither dividing nor preparing to divide, or a distinct quiescent stage that occurs outside of the cell cycle

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.