BIOL 3060 Chapter x: Chromatin Remodeling

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azuremouse502

22 Nov 2016

School

Utah State University

Department

Biology

Course

BIOL 3060

Professor

Podgorski

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Document Summary

Occurs by relaxing (opening up) chromatin structure prevents binding of transcription factors, activators, and polymerase helical dna tightly coils to form octamers chromatin structure represses gene expression chromatin remodeling (through chromatin remodeling complexes) covalent modification of histones. Dna must unwind in order for transcription to take place. In the nucleus, histone proteins associate to form octamers. chromatin structure changes and the dna becomes more accessible to the transcriptional machinery. Major points of controls are: chromatin condensation transcription initiation. Rna stability, translation and transcription (through rna interference) post-translational modifications. Before transcription can occur, dna must be made accessible to transcription factors. The link between transcriptional activators and chromatin condensation. Chromatin condensation control and transcriptional regulation are intertwined in chromatin certain transcription factors and other proteins that regulate transcription either have acetyl transferase activity or attract acetyltransferases to dna. Uv light creates covalent bonds between dna and protein.

Related Questions

1. Which one of the following peptides will show the strongest absorbance of UV light at a wavelength of 280 nm? a. ESLALRIFPTV

b. YDQHHWRIYTS

c. HSIVYDGN

d. NQTRSTRHS

e. HNSLRHMTP

2. In a multiple sequence alignment, which of the following pairs or groups of amino acids would NOT be considered similar? a. E and D

b. F and P

c. I, L, and M

d. S and T

e. K and R

3. On a Ramachandran plot, which amino acid would show the largest range of Ï and Ï angles?

a. D

b. S

c. C

d. P

e. G

Thank you so much!

72) A three point cross is carried out and the following offspring are recovered

Rst 250
RST 150
RsT 150

rST 100

rst 125

RSt 100

rSt 75

rsT 50

What is the correct order of the genes

a) RST +++++

b) SRT

c) STR

73) What is the closest to correct map

a) S.....42.5.....R.....37.5.....T

b) T.....42.5.....S.....37.5.....R

c) R.....42.5.....S.....37.5.....T

d) T.....42.5.....R.....37.5.....S

e) R.....42.5.....T.....37.5.....S+++++

74) What is the closest value to the interference?

a) 0

b) 0.05 +++++

c) 0.10
d) 0.25
e) 0.50

I only need help with #74, the interference question- the other questions are posted as referance to solve the question. The correct answers are marked with +++++. Please EXPLAIN and show all steps, thank you!

The following diagram represents two nonhomologous chromosomesin the diploid cells of an organism. Note: the _*indicates the centromere.

A B _* C D E F G H

R S _* T U V W X

Another cell from this same individualis found to contain the chromosomes below. The homologues for thesetwo chromosomes are normal. What type of chromosomal mutation ismost likely to have occurred?

A B _* C D E F G H

R S _* T U V G W X

a.paracentric inversion

b.nonreciprocal translocation

c.displaced duplication

d.interstitial deletion

e.none of the above â this type ofchange is not possible

pinkmacaw274

BIOL 3060 Chapter x: Chromatin Remodeling

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