Which of the following statements is not correct about the phospholipid molecules in the plasma membrane? a. protein molecules may be partially or wholly embedded
b. protein molecules are localized towards one side of the cell
c. phospholipids form a bilayer
d. phospholipids have a fluid consistency
e. the head of the phospholipid molecules is attracted towards water

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

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.

What factors contribute to the effect an environmental toxin has on the human body?