BIO 101 Final Chapter 2

Question 1

Atomic Structure

Answer 1

Particle Mass Charge Location

Proton 1 + in nucleus

Neutron 1 no charge in nucleus

Electron 0 - outside nucleus

Question 2

Molecule:

Answer 2

the smallest unit of a compound; where atoms are linked together

1Na + 1Cl = 1 molecule of NaCl

Question 3

Chemical Bonds

Polar Covalent Bonds: atoms share e- unequally

Answer 3

Since H20 is a polar molecule, it can very effectively dissolve other polar substances

Question 4

Hydrogen bonding

Answer 4

hydrogen bonding occurs between molecules, not between atoms within a molecule.

Question 5

Carbohydrate Types

Answer 5

monosaccharides (1 monomer): glucose, fructose, galactose.

disaccharides (2 monomers): sucrose, lactose.

polysaccharides ( many monomers): glycogen, cellulose,starch.

Question 6

Cellulose is….

Answer 6

made up of glucose molecules (so is starch)

Question 7

Enzymes are:

Answer 7

composed of amino acids
biological catalysts
increase the rate at which reactions occur
induce shape changes in the molecule they bind (substrate)
help initiate chemical reactions

Question 8

Determine sequence of bases on the other (complimentary) strand of DNA.

Answer 8

AGCTAGCCT

TCGATCGGA