Question

61. The lac operon a. is an example of negative control. b. is affected by catabolite repression c. produces lactose. d. is an example of a regulon. e. a and b Bonus questions: nepxample of its use. (0.5 pts) Describe biotechnology and list only one example of its use. es that (0.5 pts) Why are bacteria so diverse and list one example of such diversity?

Answer 1

61.e...Both a and b

It is an example of negative control because expression is typically blocked by an active repressor.. that turns off transcription.. The lac repressor binds to the operator region and negatively prevents the transcription..  

In some catabolic breakdown product of glucose prevents activation of the lac operon by lactose, so this effect was originally called catabolite repression. The effect of the glucose catabolite is exerted on an important cellular constituent called cyclic adenosine monophosphate (cAMP).

bonus questions

Biotechnology is the branch of science and can be defined as application of technology using the living organisms to obtain the useful products . .

For example,

application of biotechnology is the directed use of microorganisms for the manufacture of organic products such as beer and milk products. .

2.Although bacterial cells are very much smaller and simple in their structure than eukaryotic cells, the bacteria are an exceedingly diverse group of organisms that differ in size, shape, habitat, and metabolism.

Bacteria has come from studies of disease-causing bacteria, which are more readily isolated in pure culture and more easily investigated than are many of the free-living species of bacteria. It must be noted that many free-living bacteria are quite different from the bacteria that are adapted to live as animal parasites or symbionts. Thus, there are no absolute rules about bacterial composition or structure, and there are many exceptions to any general statement. .

For example.. .

Individual bacteria can assume one of three basic shapes: spherical (coccus), rodlike (bacillus), or curved (vibrio, spirillum). Variation is seen in the actual shapes of bacteria, and cells can be stretched or compressed in one dimension.. .