1 Which amino acid is considered the simplest? (57.0K)A) glycine B) alanine C) phenylalanine D) cysteine 2 Enzymes are proteins that __________ reactions (76.0K)A) slow down B) stop C) reverse D) speed up 3 Lactic acid fermentation occurs in the absence of __________. (53.0K)A) glucose B) oxygen C) ADP D) carbon 4 __________ was the first biomolecule synthesized outside of a living cell.A) benzene B) ethanol C) formaldehyde D) urea 5 __________ function as biological catalysts, make up your muscles and tendons, and help transport substances in your blood.A) Carbohydrates B) Esters C) Proteins D) Sugars 6 Carbohydrates are made up of these three elements.A) carbon, hydrogen, and oxygen B) carbon, calcium, and hydrogen C) carbon, phosphorus, and hydrogen D) carbon, nitrogen, and oxygen 7 Glucose, fructose, and ribose are __________.A) disaccharides B) monosaccharides C) polymers D) proteins 8 Lipids serve to store energy and __________ in the body.A) digest carbohydrates B) form membranes C) form bones D) provide calcium 9 Adenine, cytosine, guanine, thymine, and uracil are five different __________ found in nucleotides.A) nitrogen-containing bases B) phosphate groups C) sugars D) nucleic acids 10 An __________ atom is at the center of the hemoglobin molecule.A) carbon B) copper C) iron D) nitrogen