Concepts | Questions | Media Resources |
15.1 Prokaryotic Regulation
| | |
- Regulator genes control the expression of genes that code for a protein product.
| - What are the three elements of an operon?
Answer - What is a regulator gene and what does it do?
Answer - What is the function of a repressor molecule?
Answer - What is the difference between a repressible and an inducible operon?
Answer
|
Essential Study Partner
Summaries of major points- Operon model
- The trp operon
- The lac operon
- Further control of the lac operon
Labeling Exercises
Animations
(To play the animation, lengthen the pop-up window until the control bar appears.)
|
15.2 Eukaryotic Regulation
| | |
- The control of gene expression occurs at all levels, from transcription to the activity of proteins in the cytoplasm.
- The structural organization of chromatin and various mechanisms help control gene expression in eukaryotes.
| - True or False: The genes of all eukaryotic cells in a multicellular individual are regulated to produce the same protein at the same time.
Answer - What is transcriptional control and where does it occur?
Answer - What are euchromatin and heterochromatin?
Answer - How does histone interact with chromatin to prevent transcription?
Answer - Proteins that bind to the promoter region of a gene and then attract and bind with RNA polymerase are called _______________. This protein complex functions to _____________.
Answer - Differences in how mRNA is processed are a type of ____________ control and occur in the ____________.
Answer - What are the three means of translational control?
Answer - What type of molecule is affected by posttranslational control?
Answer
| Summaries of major points:- Expression of genes
- Transcriptional control
- Posttranscriptional control
- Translational control
- Posttranslational control
Art Quizzes
|
15.3 Genetic Mutations
| | |
- Mutations occur when the nucleotide base sequence of DNA changes.
- Mutations can lead to proteins that do not function or do not function properly.
- Mutations of regulatory genes are now known to cause cancer.
| - Which has the potential to cause the greatest change in a protein product, point mutations or frameshift mutations, and why?
Answer - What is the function of the protein encoded by the p53 gene and what happens if it is inactivated by a mutation?
Answer - What is the difference between mutagens and carcinogens?
Answer - Sequences of DNA that can move from location to location within or between chromosomes are called _______________.
Answer
| Summaries of major points:- A genetic mutation is a permanent change in the sequence of bases in DNA
- Cause of mutations
- Point mutations
- Carcinogens
- Regulation of the cell cycle
Animations
(To play the animation, lengthen the pop-up window until the control bar appears.)
|