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CHAPTER TWO
PRACTICE QUIZ
1. The atomic number is equal to the number of ________________.
2. ____________ energy is the energy of motion.
3. Substances made of two or more of the same atoms held together by chemical bonds is called a(an)
______________.
4. Atoms that share electrons are said to possess ____________ bonds.
5. Elements with the same number of protons and electrons but different number of neutrons is called a(an)
____________________.
6. According to the periodic chart from the Appendix of your text, the atomic symbol for sulfur is
____________.
7. Positively charged atoms are called _____________.
8. The subatomic particle that possesses a negative charge is the _________________.
9. ___________ have a bitter taste, feel slippery, and are proton acceptors.
10. An uneven distribution of charge across a compound such as water causes the molecule to be
_________________.
11. Any compound that possesses carbon is said to be _______________ and is typically associated only
with living things.
12. Water molecules that stick to each other are said to demonstrate _____________.
13. Weak acids and weak bases help the body to resist shifts in pH and are therefore called ____________.
14. A common example of a monosaccharide is _________________.
15. The monomer units of a triglyceride are: three ______________ and one ____________.
16. The monomer unit of a protein is a(n) ____________________.
17. A polymer of proteins is called a(n) _____________________.
18. _________________ fatty acids possess one or more carbon-carbon double bonds in their chain.
19. In a DNA molecule, guanine will always hydrogen bond to _____________.
20. A nucleotide is made of three things: ____________, _____________, & ____________.
21. How many different amino acids are there? ____________________
22. ______________ is a disaccharide made of one glucose molecule and one galactose molecule bound
together by chemical bonds.
23. ___________________ make up the cell membrane of all cells. They have only two fatty acid chains,
one glycerol and a phosphate group.
24. Monomers combine to form polymers by a process called ________________.
25. _______________ is when a polysaccharide is broken down into monosaccharides by the addition of
water.
Answers:
1. Protons
2. Kinetic
3. Molecule
4. Covalent
5. Isotope
6. S
7. Cations
8. Electron
9. Bases
10. Polar
11. Organic
12. Cohesion
13. Buffers
14. Glucose, Fructose, Galactose, Ribose, Deoxyribose
15. Fatty acid chains, glycerol
16. Amino acid
17. Polypeptide
18. Unsaturated
19. Cytosine
20. Phosphate group, sugar, nucleic acid
21. Five
22. Lactose
23. Phospholipid
24. Dehydration synthesis
25. Hydrolysis