answer

watching

views

erinherring531Lv1

28 Sep 2019

The regulation of Gene Expression can occur at any point in the Central Dogma (in the flow of information). We have examined transcriptional control. Describe the DNA and Protein components that are required to regulate gene expression at the level of transcription (think initiation) and give their role in the process.

answer

watching

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Lelia LubowitzLv2

28 Sep 2019

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Related questions

â¢ Identify the mechanisms for gene expression control in the lac and trp operons

â¢ Explain what transcription factors and regulatory proteins are and how they regulated gene expression in eukaryotes.

â¢ Describe how chromatin structure (DNA methylation and histone modification) can affect gene expression

â¢ Explain the process of protein degradation and its purpose

â¢ Contrast the mechanisms regulating gene expression depending on when they act on: 1) regulating transcription, 2) posttranscriptionally (regulating the mRNA and protein synthesis) and posttranslationally (regulation of protein degradation)

silveralpaca631

Most cell signaling pathways eventually regulate gene expression by regulating transcription factors in the nucleus. In class, we have discussed several pathways (e.g. Wnt, SMAD, NFkB, cAMP-dependent signaling, MAPK pathway, and Notch signaling) that result in transcriptional regulation by sending a protein into the nucleus. Choose 3 of these pathways and discuss: what the protein is that enters the nucleus, how it is activated by its signaling pathway, and whether the activated protein that enters the nucleus is directly responsible for binding to DNA or whether it exerts its effects by regulating transcription factors. Be specific and explain your answer.

1. What reaction is catalyzed by reverse transcriptase and used in the laboratory to generate cDNA?

a. transcription of RNA to DNA

b. transcription of DNA to RNA

c. conversion of ribonucleotides into deoxyribonucleotides

d. translation of RNA to DNA

e. conversion of a ribonucleotide to a DNA double helix

2. In eukaryotic cells, _________determine the amount of mRNA arising from a particular gene.

a. transcriptional-level controls

b. RNA processing-level controls

c. translational-level controls

d. replication-level controls

e. b and c

3. In eukaryotic cells, _________determine how a primary transcript is converted to mature mRNA

a. transcriptional-level controls

b. RNA processing-level controls

c. translational-level controls

d. replication-level controls

e. a and d

4. In eukaryotic cells, _________determine when a particular mRNA is actually used in protein synthesis.

a. transcriptional-level controls

b. RNA processing-level controls

c. translational-level controls

d. replication-level controls

e. None of the above because protein synthesis takes place immediately

5. Under what circumstances do cells selectively activate and suppress their genes?

a. at different stages of embryonic development

b. in different tissues

c. exposure to different types of stimuli

d. No such circumstances exist in natureâcells express all their genes throughout life.

e. a, b and c

6. Which statement about the control of gene expression is FALSE?

a. A single gene may be controlled by different transcription factors.

b. A single transcription factor may be necessary for the expression of different genes.

c. Each cell type has a characteristic pattern of gene transcription, which is determined by the particular complement of transcription factors contained in that cell.

d. Expression of protein genes is primarily controlled in nucleoli

e. Control of gene transcription is complex and influenced by various circumstances.

7. What is thought to maintain X chromosome inactivation in females?

a. DNA acetylation

b. DNA methylation

c. RNA inactivation

d. Histone methylation

e. None of the above because both X chromosomes are active in females and males.