which of the following statements about good experiments is true?a good experiment should hold potentially confounding variables constant between groups. none of the abovea good experiment must have an experimental group. a control group may be useful but not critical. a good experiment should only include replication if the hypothesis has never been tested before. Help me please

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

You grow to. e jansnnsns