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Chapter 11: Problem 1

Why is control of gene expression necessary?

Short Answer

Expert verified
Control of gene expression is necessary to maintain an organism's homeostasis, ensuring that right genes are activated at right times and in the right cells. This prevents adverse consequences like inappropriate cell growth and division which can lead to diseases like cancer.

Step by step solution

01

Define Gene Expression

Gene expression is the process by which specific genes are activated to produce a necessary protein. This process involves two steps named transcription and translation. These two steps are essentially the processes by which a protein is synthesized.
02

Explain the Need for Gene Expression Control

Not all genes need to be expressed or activated at the same time, or in all cells. Certain genes are only activated under specific circumstances or during certain stages of growth, or in certain types of cells. Hence, control over gene expression is necessary to ensure that the right genes are expressed at the right times and in the right cells, which in turn will help maintain the organism's homeostasis.
03

Explain the Consequences of Uncontrolled Gene Expression

Uncontrolled or inappropriate gene expression can lead to disastrous results, including development of diseases such as cancer. For example, if the genes controlling cell growth and division are expressed too much or at the wrong time, this could lead to uncontrolled cell division, a key characteristic of cancer. Therefore, precise control of gene expression is crucial.

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Most popular questions from this chapter

In the 1960 s, a gene was defined as a continuous sequence of DNA, located permanently at one place on a chromosome, that specifies a sequence of amino acids from one strand. List three ways this definition has changed.

Describe three types of cells and how they differ in gene expression from each other.

State two ways that methyl groups control gene expression.

How do histones control gene expression, yet genes also control histones?

Describe three ways that the number of proteins exceeds the number of protein- encoding genes in the human genome.
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