Changes in protein structure caused by phosphorylation of other protein modifications are referred to as conformational changes. The use of ATP to add a phosphate group to a protein allows for movement of molecules via .

via "active transport"

Explanation:

Active transport refers to the natural movement of molecules across a cell membrane from lower concentrations to higher concentrations. This cellular mechanism has the role to reduce the differences in the concentrations of these molecules

it has one origin of replication, but it proceeds in two directions - d)

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