Both statements are false. I. Adding acetyl groups in the histone tail restricts access to genes. II. Adding methyl groups in the histone tail unravels the DNA. OA.Only the first statement is true. B.Only the second statement is true. OC. Both statements are true. OD. Both statements are false.

Both statements are false. I. Adding acetyl groups in the histone tail restricts access to genes. II. Adding methyl groups in the histone tail unravels the DNA. OA.Only the first statement is true. B.Only the second statement is true. OC. Both statements are true. OD. Both statements are false.

Name: 3 Both statements are false.I. Adding acetyl groups in the histonetail
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Description: 3 Both statements are false.I. Adding acetyl groups in the histonetail restricts access to genes.II. Adding methyl groups in thehistone tail unravels the DNA.OA.Only the first statement is true.B.Only the second statement is true.OC. Both statements

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 6RQ: A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA...

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DNA is the blueprint for the cell, but not all genes in DNA lead to protein. Gene expression is the study of how genes are used to make their particular product. What are some examples of gene products that do not lead to proteins? (a) DNA can lead to carbohydrates. (b) can lead to phospholipids. (c) DNA can lead to lipids. (d) DNA can lead to RNAs which don't go on to be translated into protein.
Which of the following statament is NOT TRUE about gene expression?a. The expression of genes that code for proteins includes two stages: replication and translationb. Translation is the synthesis of a polypeptide using the information in the mRNA.c. During gene expression, the information encoded in genes is used to make specific polypeptide chains or RNA molecules.d. Gene expression is the process by which DNA directs the synthesis of proteins
Which statement about transposons is INCORRECT? a.A transposon is a small fragment of DNA that can move from one location in a chromosome to another location in the same chromosome. b.Transposon insertion into a gene causes a mutation that can be reversed by removal of the transposon. c.Transposon movement often occurs when the cell is under genomic stress. d.In nature, insertion of a transposon can be deliberately added into a harmful gene to enhance survival.
CG Islands in DNA are important for :- A) Methylation B) Acetylation C) t- RNA synthesis D) DNA replication
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How is gene expression similar to DNA replication, and how is it different? Give at least one similarity and one difference.
A. What do scientists do to adult cells to make them “behave” like embryos? B. Transgenic, cloned sheep were used to produce what medical protein?
Describe the mechanism by which histone modifications are established after DNA replication and cell division. What are some things that could go wrong if modifications can't be maintained? Think about what histone modifications do to DNA and why cells maintain parts of their chromosome as heterochromatin.
Which of these is NOT true of nucleosomes? A. Some post-translational modifications to histone proteins serve as binding sites for transcription factors. B. The position of nucleosomes is fixed on the genome and can not be changed. C. The position and post-translational modifications of histones can be inherited through mitosis. D. The binding between DNA and histone proteins can be disrupted by post-translational modifications.
Other than obvious changes in protein-encoding Neanderthal genes, changes in what type of non-coding DNA sequences would affect cell function? A) Alu family of repeated sequences B) Short tandem repeats (STRs) C) Protein factors that regulate gene expression D) Short interspersed nuclear elements (SINEs)
What might best explain why the incidence of cancer increases as people age? Select one: a. mutations accumulate as people age b. cell division increases as people age c. protein synthesis increases as people age d. telomerase activity increases as people age e. ATP production increases as people age
A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA nucleotides c. a protein that binds to DNA d. an enzyme that synthesizes RNA