Biology Crossword

6. s a large molecule made up of chains or rings of linked monomer units
7. substance consisting of atoms which all have the same number of protons
10. consist of either one or two long chains of repeating units called nucleotide
12. a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other
15. a substance that has amino acids
17. which two molecules combine to form a larger molecule with the elimination of a small molecule
18. Acid are the building blocks of proteins
19. is a numeric scale used to specify the acidity or basicity of an aqueous solution
20. catalysts which speed up chemical reactions
22. that involves the sharing of electron pairs between atoms

1. group of atoms bonded together
2. the tendency of dissimilar particles or surfaces to cling to one another
3. basic unit of chemical element
4. is the process of joining two molecules, or compounds, together following the removal of water
5. comprise a group of naturally occurring molecules
8. very large molecule
9. analogy first postulated in 1894
11. form when one atom gives up one or more electrons to another atom
13. include sugars, starches, saccharides, and polysaccharides
14. Any of a series of sweet-tasting, crystalline carbohydrates, especially a simple sugar
16. action or property of like molecules sticking together
21. are small molecules, mostly organic, that can join with other similar molecules to form very large molecules