Gene Regulation Practice Bio B

Gene expression is the ability for a gene to be:

• in the genome.

• transcribed.

• non-coding.

• a dominant allele.

Hox genes are the most powerful control on the morphology of animals. They do this by:

• being highly conserved.

• coding for the body plan.

• coding body segmentation.

• regulating transcription of other genes.

Gene regulation occurs:

• only in some cells.

• when the variability within the genetic code is insufficiently adaptive for the individual to survive in its environment.

• constantly, in all known life forms.

• during embryonic development.

_______ is to transcription as ________ is to translation.

• mRNA / Amino Acid Chain
• Amino Acid Chain / mRNA
• Ribosome / Nucleus
• mRNA / tRNA

In the lac operon model the genes within the operon will be expressed if:

• lactose is absent in the cell
• glucose is present in the cell
• lactose is present in the cell

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors
• topoisomerase
• regulatory genes
• activators

True or False: All of your body cells contain the same genes.

• True

• False

The operon model was discovered in E. Coli and is almost exclusively found in ​ (a)   .

• prokaryotes
• eukaryotes