What would be the limiting factor for atp production by glycolysis in a strenuously exercising muscle that lacks lactate dehydrogenase? a. increased acidity from lactic acid, causing muscle damage b. the supply of nad+ c. the supply of adp e. the supply of pyruvate

The correct answer is option b. "the supply of NAD+".

Explanation:

Regarding cell's culture, a limiting factor is defined as an element added to the system who is essential for the proper growth of the cells or in the production of the element of interest. Even a small change in a limiting factor would cause a notorious effect in the cell's culture. In this case, a strenuously exercising muscle that lacks lactate dehydrogenase is being cultured. Given that lactate dehydrogenase is the enzyme that converts NAD+ to NADH and back, the limiting factor in the culture of the muscle is the supply of NAD+ because the culture lacks of the enzyme that produces it.

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.

credit: gradman555p98x9p

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