Starch and cellulose are two polysaccharides formed from glucose monomers with glycosidic linkages. Most animals can use starch for energy, but cannot digest cellulose. Which of the following statements best describes how the molecular structure of cellulose inhibits its digestion by animals? A) The location of the disulfide bridges in cellulose create a linear structure where enzymes cannot catalyze decomposition.
B) The modified glucose units of cellulose have a nitrogen-containing functional group that inhibits decomposition.
C) Cellulose is made of glucose monomers in α form that animal enzymes cannot hydrolyze.
D) Cellulose is made of glucose monomers with β linkages that animal enzymes cannot hydrolyze.

Match the descriptions / definitions with the term they best describe 1. three dimensional relationship of the different polypeptide chains in a multisubunit protein or protein complex 2. common folding pattern in proteins in which a linear sequence of amino acids folds into a right-handed coil stabilized by internal hydrogen-bonding between polypeptide backbone atoms. 3. the amino acid sequence of a protein 4. a region on the surface of a protein that can interact with another molecule through noncovalent bonding. 5. three-dimensional arrangement of alpha-helices and beta-sheets within a single polypeptide, typically stabilized by a variety of noncovalent bonds, including ionic and hydrogen bonds, and nonpolar interactions / hydrophobic force. 6. the chain of repeating carbon and nitrogen atoms, linked by peptide bonds, in a protein. 7. common structural motif in proteins in which different sections of the polypeptide chain run alongside each other and are joined together by hydrogen bonding between atoms of the polypeptide backbone. 8. portion of a polypeptide chain that has a discrete tertiary structure of its own and can often fold independently of the rest of the chain 9. regular local folding patterns in a protein, including alpha-helix and beta-sheet a. primary structure b. beta-sheet c. protein d. coiled-coil e. polypeptide backbone f. secondary structure g. side chain h. tertiary structure i. binding site j. alpha-helix k. quaternary structure l. protein domain

What is turgor pressure, what causes it, and what does it do for a plant?

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure