Using the model of a process above, identify the molecule that is shaded in purple and its function

this is rna polymerase performing transcription

this is a ribosome and is performing translation

this is dna polymerase and is performing replication

this is an excision repair enzyme that repairs mutations

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.