LAB QUIZ 4- GEN BIO

Name the part of an atom the determines whether and how the atom will bond with other atoms

an atom’s electrons (2, 8, 8)

Define covalent bonds

Sharing of electron pairs

Define ionic bonds

one atom transfers one or more electrons completely to another; the result is two oppositely charged ions; the two oppositely charged ions attract each other, forming an ionic compound

Define Acid

proton donor, a substance that can donate a hydrogen ion, or proton, into solution

Define Base

a proton acceptor, substance that can accept a hydrogen ion.

Define pH and acidic pH range, basic pH range and neutral pH.

Ph of solution is defined as the -log[H+]

acidic : 0-6

basic : 8-14

Neutral ph: 7

Define buffers

Is a solution that can resist changes in pH when small quantities of acid or base are added to it.

Name the 4 classes of macromolecules

Carbohydrates, proteins, nucleic acids, lipids

Name the 3 types of carbohydrates

Monosaccharides, disaccharidases, polysaccharides

Name the test for starch or polysaccharides

Iodine test

Name the test for reducing sugar

Benedict’s test

Name the 3 categories of lipids

Triglycerides, phospholipids, steroids 

Name a test for lipids

grease spot test (leave a translucent area on a brown paper bag)

Name a test for lipids

Sudan IV

Name the test for the presence of protein

Biuret Test