MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
- An atom's p+ are found in its ____.
a. molecule c. nucleus e. neutron b. shell d. orbital
- All atoms of an element have the same number of ____.
a. e- plus n0 c. p+ plus n0 e. n0 b. e- d. p+
- Nitrogen has an atomic number of 7; therefore it has ____ e- in its outermost electron shell.
a. one c. three e. five b. two d. four
- What is the atomic mass of an atom that has six p+, six n0, and six e-?
a. plus one c. eighteen e. twelve b. eight d. six
- An atom with an electrical charge is a(n) ____.
a. isotope c. molecule e. compound b. ion d. radioisotope
- An atom with a positive charge has ____.
a. more e- than p+ c. more n0 than p+ e. more p+ than n0 b. more p+ than e- d. equal numbers of p+ and e-
- The bond between oppositely charged ions is a(n) ____ bond.
a. polar covalent c. covalent e. isotonic b. ionic d. hydrogen
- What name is given to bonds that involve the sharing of e-?
a. hydrogen c. isotonic e. van der Waals b. covalent d. ionic
- The tendency of water molecules to stick together is referred to as ____.
a. polarity c. adhesion e. cohesion b. transpiration d. evaporation
- The hydrogens and oxygen of a water molecule are held together by ____ bonds.
a. osmotic c. hydrolytic e. hydrogen b. covalent d. ionic
- Water's surface tension and heat storage capacity are accounted for by its ____.
a. size c. orbitals e. hydrogen bonds b. weight d. mass
- Why (if you are careful) are you able to float a needle on the surface of water?
- The surface tension that is a result of water's cohesive properties make this possible.
- The covalent bonds that hold a water molecule together are responsible for this ability.
- I learned this at Candy Mountain.
- Water exhibits adhesive properties.
- A single needle is less dense than water.
- The lower the pH of a solution, the ____.
a. lower the number of atoms c. more acidic the solution e. more basic the solution b. higher the OH- concentration d. less toxic the solution
- A single carbon atom can form a maximum of ______ covalent bond(s).
a. no c. two e. four b. one d. three
- Carbon can form compounds in the shapes of:
- chains, links and beads.
- chains, branched chains and rings.
- chains, branched chains and triangles.
- monomers, dimers and polymers.
- chains, blocks and ropes.
- What name is given to the following reaction? galactose + glucose → lactose + water
a. gluconeogenesis c. glycolysis e. hydrogenation b. dehydration synthesis d. hydrolysis
- Given the reaction: galactose + glucose → lactose + water, galactose is a ______.
a. polysaccharide c. protein e. monomer b. polymer d. lipid
- A pentose sugar has ___ carbons.
a. three c. five e. VII b. four d. six
- Animals store carbohydrates as ______.
a. starch c. cellulose e. maltose b. glycogen d. glucose
- The molecule C6H12O6 is best described as a ______.
a. nucleic acid c. lipid e. carbohydrate b. protein d. hydrocarbon
- Cellulose is an example of a ______.
a. steroid c. nucleic acid e. fat b. polymer d. polypeptide
- Which of the following is an example of a polysaccharide?
a. maltose c. sucrose e. starch b. glucose d. fructose
- Complete the equation: monosaccharide + monosaccharide → ______ + water
a. nucleic acid c. polysaccharide e. polypeptide b. disaccharide d. fat
- When a glycerol and 3 fatty acids combine to form a fat there are also ___ molecules of water formed.
a. one c. three e. six b. two d. four
- Four linked carbon rings form a lipid group called ____________.
a. hydrocarbon c. steroid e. paranoid b. fatty acid d. wax
- What type of fatty acid has double bonds?
a. unsaturated c. monoglyceride e. saturated b. triglyceride d. steroid
- What are saturated fats saturated with?
a. hydrogen c. nitrogen e. carbon b. creamy goodness d. oxygen
- ______ is a steroid.
a. Cholesterol c. Butter e. Maltose b. Amino acid d. Monounsaturated fat
- Proteins are polymers constructed from ______ monomers.
a. hydrocarbon c. peptide e. 5-carbon ring b. amino acid d. nucleotide
- Destruction of a protein's shape is called ______.
a. hydrogenation c. anabolism e. denaturation b. hydrolysis d. dehydration synthesis
- The chemicals we used such as Biuret and Lugol's solution would change color when
- when a starch was present.
- when the correct macromolecule was present.
- when the correct macromolecule was absent.
- the solution was acidic.
- rain was coming.
- On the back of the answer sheet compare and contrast polymers (for example carbohydrates) and composite molecules (lipids).