Digest excess or worn-out cell parts, food particles, and invading viruses or bacteria. produces a usable form of energy for the cell. brainliest and 47 points quick. a. mitochondria b. endoplasmic reticulum c. nucleus d. golgi apparatus

the answer could not be D because a Golgi Apparatus  is a tiny structure, or organelle, in a cell that "packages" nutrients for use inside the cell. The answer could not be c. because a nucleus  is a tiny structure, or organelle, in a cell that "packages" nutrients for use inside the cell. The answer could not be  Endoplasmic Reticulum because that is where proteins are transported from one part to the other. So the only answer left is Mitochondria, because the Mitochondriamain function is to produce ATP, the energy currency of the cell.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."