Regulation of Gene Expression

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

1
1
What is the scientific term for the process by which the product of an enzymatic reaction inhibits the enzymatic reaction?
2
1
How does a repressor block gene expression in our operon examples?
3
1
Fill in the blank. For the trp operon example, the repressor is expressed _____________ and the operon is normally ____________.
4
1
Which is an example of concentration-dependent receptor activation for the trp operon?
5
1
Fill in the blank. For the lac operon example, the repressor is expressed _____________ and the operon is typically ____________.
6
1
What is the signaling molecule for the lac operon?
7
1
What is the collective function of the lac operon genes?
8
1
Which cell type does not contain all of an organism’s genetic information?
9
1
Which of the below is not an example of negative gene expression/regulation?
10
1
How can histones decrease transcription?
11
1
Which of the following is a modification of histones that influences gene expression?
12
1
Which of the following is not a characteristic of a TATA box?
13
1
Fill in the blanks. DNA that is tightly packed around histones is called ______________ and DNA that is not tightly associated with histones is called ______________.
14
1
Which of the following is a DNA element outside of the promoter that can increase gene transcription?
15
1
What molecular machine is responsible for excising introns from RNA transcripts?
16
1
The trp operon is controlled by a single promoter. How many mRNA molecule(s) are transcribed for 5 genes?
17
1
How are 5 proteins translated from the trp operon?
18
1
Which complex allows RNA polymerase to bind and do its job?
19
1
Which of the following is not considered a method of regulating gene expression?
20
1
The trp operon has 5 genes that code for 3 enzymes. How is this possible?
21
1
In positive gene expression (or regulation), which of the following is true?