Which of the following terms best characterizes catabolite repression associated with the lactose operon in e. coli? a. negative controlb. constitutivec. repressible systemd. positive controle. inducible system

Option C, Positive control

Explanation:

This process (as described in question) is termed as positive control of transcription. This is a positive control as it causes up regulation. Up regulation enhances or increases the rate at which an operon transcripts.  

This is also known as glucose effect and was first discovered in E.coli. To understand the glucose effect, a graph was plotted which depicted that bacteria utilizes glucose as an energy source till it get exhausted. After exhaustion of glucose, lactose is used for exponential growth

Hence, option C is correct

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

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the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.