What is the main difference between prokaryotic cells and eukaryotic cells? a) eukaryotic cells are smaller than prokaryotic cells. b) only eukaryotic cells have its genetic material surrounded by a membrane. c) prokaryotic cells have many organelles, each with their own specialization function. d) eukaryotic cells have a cell membrane and a cell wall; prokaryotes have a membrane only.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.