Front

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though they look and perform completely different?

Back

The proteins expressed in each cell are different.

Front

Gene

Back

A segment of DNA that encodes for a protein

Front

The process by which a cell becomes specialized for a specific structure or function.

Back

cell differentiation

Front

Activation or deactivation of genes by environmental experiences throughout development

Back

gene expression

Front

Protein molecules around which DNA is tightly coiled in chromatin

Back

Histones

Front

The complete instructions for making an organism, consisting of all the genetic material in that organism's chromosomes.

Back

genome

Front

What is the difference between DNA code and the epigenome?

Back

The DNA code is fixed for life, while the epigenome is flexible.

Front

At which stage in the lives of identical twins is the DNA code expected to be most similar? Options: Age 6 months, Age 21, Age 55, Trick question; the DNA code doesn't generally change

Back

Trick question; the DNA code doesn't generally change

Front

At what stage in the life of identical twins is the epigenome expected to be most similar? Options: Age 6 months, Age 21, Age 55, Trick question; the epigenome never changes

Back

Age 6 months

Front

When cells are exposed to chemicals that damage DNA, what is the usual response?

Back

Normal biochemical repair processes fix any damage