Cell transport processes

Created March 2020, Offline version here
Video by 'Professor Dave explains', also on his YouTube Channel.


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1. This box facilitates the separation of complementary strands of DNA.
2. What sequence serves as the on/off switch for the trp or lac operons?
3. This initiation complex forms to facilitate RNA polymerase binding.
4. This is the sequence upstream of a gene where proteins bind to facilitate RNA polymerase binding.
5. What is the term for DNA that is silenced by histones?
6. What is the term for a functioning unit of DNA that contains a single promoter and many downstream genes?
7. This signal molecule activates the repressor in one of our operon examples.
8. This is a product of lactose metabolism in Escherichia coli cells.
9. This signal molecule inactivates the repressor in one of our operon examples.
10. Acetylation, methylation and phosphorylation of this protein influences the transcription of genes.
11. What protein prevents RNA polymerase binding in the trp and lac operons?
12. What precursor molecule is metabolized in the lac operon example?
13. What is the term for DNA that can be readily accessed by RNA polymerase?
14. What DNA element outside of the promoter increases gene transcription?
15. This type of gene expression/regulation is controlled by the binding of repressors to DNA.
16. The product of an enzymatic reaction inhibits the enzymatic reaction in what type of inhibition?
17. This type of gene expression/regulation is controlled by the binding of transcription factors to DNA.