An organism that regulates its temperature internally.
an organism that uses external sources of heat to regulate its temperature.
an organism whose internal temperature may vary considerably.
an organism that maintains a constant internal temperature.
a. endotherm
b. homeotherm
c. ectotherm
d. poikilotherm

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.

Genes that come together with different alleles are heterozygous. homozygous. genotype. segregated.

Interferons play a vital role in the immune system why are interferons so important?