Which of the following best describes the what happens during gene expression?
a. a cell reads the instructions in dna and builds a protein based on those instructions.
b. a gene is copied many times so that all of a cell s daughter cells will have their own copy.
c. the nucleus of a cell builds cellular proteins based on the sequence of the mrna code.
d. a single gene leaves the nucleus of a cell and travels through the cytoplasm to the membrane.

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

Nucleic acids offer variability because they contain alternate forms of genes called .

Which factor that affects biodiversity?