c
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which process moves an ion across a cell membrane against the concentration gradient?
diffusion
exocytosis
facilitated diffusion
active transport

The correct answer is active transport.

Explanation:

Active transport is a specific type of membrane transport process that deals with the transport of solute molecules and ions against their concentration gradient which means from the region of low concentration to the high concentration region.Active transport is also known as uphill transport.

       As the active transport moves solute nolecules and ions against their concentration gradient an energy source is being utilized in form of ATP molecules to carry out this uphill transport process.

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation: