Notes Extra Info

Question 1

True or False: a hydrogen bond must occur between two different molecules

Answer 1

True

Question 2

True or False: Van der Waals interactions may occur between polar molecules

Answer 2

False, must be between non polar hydrophobic

Question 3

Breaking bonds is endothermic or exothermic?

Answer 3

endothermic

Question 4

Creating bonds is endothermic or exothermic?

Answer 4

Exothermic

Question 5

Ester linkages are present in what macromolecule?

Answer 5

lipids between glycerol and hydrocarbon chain

Question 6

Describe microtubules, including role in centrioles/cell division

Answer 6

biggest of cytoskeleton, bear tension
like railroad tracks
transports different motor proteins

centrioles, which make up centromeres, are composed of microtubules. Microtubules eventually tear chromosomes apart during cell division at kinetochere

Question 7

Describe intermediate filaments

Answer 7

most stable, more durable, most devoted to shape

Question 8

Describe actin filaments

Answer 8

Allow cells to contract, like myosin in muscles

Question 9

Compare tight, desmosomes, and gap junctions

Answer 9

tight: watertight seal, nothing is leaking out

desmosomes: two cells holding hands

gap: like a tunnel, allows stuff to move between cells. Plasmodesmata in plants