How can certain animals extract energy and nutrients from cellulose?
A. cellulose is made from alpha glucose monomers and they have they enzyme to break it down
B. cellulose is made from beta glucose monomers and they have a symbiotic relationship with bacteria to break it down
C. cellulose is not digestible for an organism, it is only insoluble fiber
D. cellulose is a protein made up of amino acids which are used to make proteins for the cell
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The graph above shows the different elements percentages found in the human body. What element is represented by the letter B?
A. carbon
B. nitrogen
C. hydrogen
D. oxygen
Which of the following are properties of water? (check all that apply)
A. polar
B. nonpolar
C. forms hydrogen bonds with other water molecules
D. forms covalent bonds with other water molecules
Lipids are considered _____ because they do not interact with water. Carbohydrates and salts are considered _____ because they do interact with water.
A. polar covalent, ionic
B. nonpolar, hydrophobic
C. hydrophobic, hydrophillic
D. polar, nonpolar
Enantiomers are possible because carbon can form 4 bonds. Which of the following best describes enantiomers?
A. compounds with the same covalent partnerships that differ in spatial arrangements of atoms
B. compounds that are mirror images of each other
C. compounds that have the same molecular formula but differ in the covalent arrangement of atoms
D. compounds that have a different formulat but the same covalent arrangement
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