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Description: When the DNA is loosened, i.e. unwound from the histones?B. Reading of genes remains the same.A. Reading of genes is increased.C. Reading of genes is decreased.

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When the DNA is loosened, i.e. unwound from the histones? B. Reading of genes remains the same. A. Reading of genes is increased. C. Reading of genes is decreased.

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 11RQ: Post-translational control refers to: a. regulation of gene expression after transcription b....

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Concept explainers

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.

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When the DNA is loosened, i.e. unwound from the histones?
B. Reading of genes remains the same.
A. Reading of genes is increased.
C. Reading of genes is decreased.

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Which statement is true about transposon? a. Transposon is known as a ‘jumping gene’. b. Transposon is composed of mobile DNA sequences. c. Transposon is a selfish gene. d. All choices are correct.
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Epigenetic marks regulate gene expression. Which epigenetic mark is NOT associated with positive gene expression? A. Histone acetylation B. Histone Methylation C. De-methylated DNA D. Methylated DNA
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What will result from the binding of a transcription factor to an enhancer region? a. decreased transcription of an adjacent gene b. increased transcription of a distant gene c. alteration of the translation of an adjacent gene d. initiation of the recruitment of RNA polymerase
What determines which transcription factors will be able to regulate a particular gene's expression? A. The collection of control element sequences that are associated with that gene B. The location of that gene sequence (which chromosome it is located on) C. The sequence of introns present in that gene D. The sequence of exons present in that gene ..
Neutralizing their positive charges would have which effect on the histone proteins? a. They would bind the DNA tighter. b. They would bind less tightly to the DNA. c. They would no longer be attracted to each other. d. They would cause supercoiling of the DNA.
In Eukaryotes, DNA is a long molecule inside a tiny nucleus. a. How can this long chain fit in such space? b. How does it affect gene expression?
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Which statement about the flow of genetic information is true? a. RNA encodes information that is translated into DNA, and DNA encodes information that is translated into protein b. DNA encodes information that is translated into RNA, and RNA encodes information that is translated into proteins c. DNA encodes information that is translated into proteins and RNA. d. Proteins encode information that is used to produce other proteins of the same amino acid sequence. e. Proteins encode information that is translated into RNA, and RNA encodes information that is transcribed into DNA
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In eukaryotic cells, the nucleosomal core contains which arrangement of histone proteins? A. two H1, one H2A, one H2B, two H3, and two H4 histone proteins B. two H2B, two H2A, two H3, and two H1 histone proteins C. two H3, two H1, two H2A, and two H2B histone proteins D. two H4, two H3, two H2B, and two H2A histone proteins E. two H2A, two H3, two H4, and two H1 histone proteins