Which of the following descriptions about the cell membrane is correct? a.) proteins molecules group together in one area b.) cholesterol molecules stick out of the membrane as signals c.) the tails of the phosophipids are attracted to water d.) proteins embedded in the membrane molecules to cross

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

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.

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.