Exam 14: Dna and Genes

During interphase, the genes that are most tightly packed are not being expressed because

Which of the following is true?

The backbone of a DNA molecule is made up of sugars and ____________________.

Specific types of proteins can attach to long-lived mRNA molecules to prevent their ____________________ when the cell does not need their protein product.

The table below shows which of these four genes are on or off in three different cell types. Why is the expression of the rRNA gene so different from the expression of the other genes in the table?

Once a gene is turned on, it cannot be turned off.

When a cell divides, it

The "rungs" in the DNA "ladder" consist of ____________________ pairs.

Noncoding DNA

The process labeled with the letter D in this diagram of the process of gene flow in a cell requires ____________________ to convert genetic information into a phenotype.

Exposure to ____________________ light can cause sunburn and massive DNA damage to skin cells.

In eukaryotes, some genes with related functions are found on different chromosomes.

If the gene of a repressor protein were to be mutated such that its protein no longer functioned, the genes it regulated would not be transcribed.

A change in an organism's environment generally results in a change in ____________________, leading to the production of different types of proteins.

The cells of organisms control when, where, and how much of each gene product is made.

At any given time, most of the genes in the genome of an organism are actively undergoing gene expression.

Transposons can move both within a chromosome and from one chromosome to another.

The early hypothesis that protein was the genetic material was based in part on the

Protein is the hereditary genetic material in human cells.

Gene ____________________ is the synthesis of a gene's protein or RNA product.