Chapter 3

Name the molecules of life and the families of small organic compounds from which they are built.

Each carbon atom can share pairs of electrons with as _________ many as other atoms. a. one b. two c. three d. four

_____________ is a simple sugar (a monosaccharide) a. Glucose c. Ribose e. both a and b b. Sucrose d. Chitin f. both a and \(c\)

5\. The fatty acid tails of unsaturated fats incorporate one or more ___________. a. single covalent bonds b. double covalent bonds

Sterols are among the many lipids with no ___________. a. saturation c. phosphates b. fatty acids d. carbons

Which of the following is a class of molecules that encompasses all of the other molecules listed? a. triglycerides c. waxes e. lipids b. fatty acids d. sterols f. phospholipids

________ are to proteins as __________ are to nucleic acids. a. Sugars; lipids c. Amino acids; hydrogen bonds b. Sugars; proteins d. Amino acids; nucleotides

A denatured protein has lost its ___________. a. hydrogen bonds c. function b. shape d. all of the above

Nucleotides occur in ____________. a. ATP b. DNA c. RNA d. all are correct

Which of the following nucleotides is not found in DNA? a. adenine \(\quad\) b. uracil c. thymine d.guanine

Match the molecule with the most suitable description. _____long sequence of amino acids _____a rechargeable battery in cells _____glycerol, fatty acids, phosphate _____two strands of nucleotides _____one or more sugar monomers a. carbohydrate b. phospholipid c. polypeptide d. DNA e. ATP