bio ch2

Question 1

four main elements of living things

Answer 1

carbon, hydrogen, oxygen, nitrogen

Question 2

ionic bonds vs. covalent bonds

Answer 2

ionic: transfer of electrons
covalent: sharing of electrons

Question 3

nonpolar covalent bond vs polar covalent bond

Answer 3

nonpolar: equal sharing (strong)
polar: unequal sharing (ex. hydrogen bond)

Question 4

6 properties of water

Answer 4

3 states
polar
high specific heat
cohesion
adhesion
solvent

Question 5

acids vs bases

Answer 5

acid: low pH, high H+, donate electrons
bases: high pH, low H+, accept electrons

Question 6

monomers vs polymers

Answer 6

monomer: single unit of molecules
polymer: long chain of monomers

Question 7

process where monomers into polymers is called

Answer 7

dehydration synthesis

Question 8

process where polymers break apart is called

Answer 8

hydrolosis

Question 9

monomer, source, and use of carbohydrates

Answer 9

glucose, sugar and starches, cell energy

Question 10

monomer, source, and use of lipids

Answer 10

phospholipid, fat and oil, stored energy and cell membranes

Question 11

monomer, source, and use of proteins

Answer 11

amino acid, meat and beans, structure of cells and enzymes

Question 12

monomer, source, and use of nucleic acids

Answer 12

nucleotides, all living things, stores genetic info

Question 13

endothermic vs exothermic

Answer 13

absorbs and release energy

Question 14

catalyst

Answer 14

lowers activation energy and speeds up reaction

Question 15

what turns off enzymes

Answer 15

changing temperature and changin pH