You’ve already learned that, in addition to proceeding through glycolysis, glucose 6-phosphate (g6p) can be used to synthesize a carbohydrate storage molecule called glycogen. glucose 6-phosphate is also a precursor for the synthesis of nucleotides that are used to build dna and rna. the first step of this pathway is catalyzed by an enzyme called glucose 6-phosphate dehydrogenase. assume that reactions in this pathway with double arrows are reversible under cellular conditions, while those with single arrows are effectively irreversible.

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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.