Cardiac muscle cells have a higher concentration of mitochondria than skeletal muscle cells. What does the difference in mitochondrial concentration most likely indicate about cardiac muscle cells compared with skeletal muscle cells? A) Cardiac muscle cells have more structural proteins in their cytoplasm.
B) Cardiac muscle cells are located farther from areas where lipids are stored.
C) Cardiac muscle cells have a lower release rate of carbon dioxide into veins.
D) Cardiac muscle cells require a larger supply of energy released through respiration.

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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maybe because its impossible for balloons to lift a whole entire house.

what are the options

explanation:

answer an inhibitory neurotransmitter in the brain;