The composite wall of an oven consists of three materials, two of which are of known thermal conductivity, kA = 30 W/m·K and kC = 60 W/m·K, and known thickness, LA = 0.3 m and LC = 0.25 m, respectively. The third material, B, which is sandwiched between materials A and C, is of known thickness, LB = 0.25 m, but unknown thermal conductivity kB. Under steady-state operating conditions, measurements reveal an outer surface temperature (on outer surface of material C) of Ts, o = 20◦C, an inner surface temperature (on inner surface of material A) of Ts, i = 400◦C, and an oven temperature of T[infinity] = 600◦C. The inside convection coefficient h = 20 W/m2 ·K. (a) What is the value of kB? (b) Sketch the temperature distribution. (c) Calculate the overall heat transfer coefficient.

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 oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

i think the answer is c hope this