The table here shows four distinct types of cells with the presence or absence of particular organelles denoted by a - (absent) or a + (present).

A researcher claims that all living cells must be able to synthesize proteins in order to maintain homeostasis and perform basic functions. What statement supports the scientist's claim?

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."

digestion

it excretes wastes

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: