QBank

Question 1

what has a higher bp: a mcule with one ketone or two?

Answer 1

two

Question 2

what has a higher bp: a butane chain or cyclic butane?

Answer 2

chain, cyclic is less stable because of the sharp bonds

Question 3

what do our eyes detect that vary the intensity of brightness of light we see?

Answer 3

the quantity of photons

Question 4

what measures the quality of light we see as color?

Answer 4

wavelength and frequency

Question 5

what is the difference between endocrine and exocrine glands?

Answer 5

endocrine glands secrete hormones directly into the bloodstream

exocrine secrete products into ducts that go directly into external environment

Question 6

what are examples of exocrine glands?

Answer 6

sweat glands, stomach, liver, salivary

Question 7

when they say a graph of ___vs____ which is x and which is y?

Answer 7

y vs x

Question 8

lower entropy means higher or lower Gibbs free E?

Answer 8

lower entropy = lower gibbs

Question 9

aldehyde + one alcohol =
If you add more alcohol you get…

ketone + one alcohol =
add more alcohol…

Answer 9

hemiacetal OR-C-OH
acetal OR-C-OR

hemiketal
ketal

Question 10

what is incomplete dominance?

Answer 10

when an intermediate between 2 alleles is present

white + red = pink offspring

Question 11

what is it called when you see both parent alleles in the offspring? white flower + red flower yields offspring with red and white spots?

Answer 11

codominance

Question 12

what’s it called when both extremes of a pheno are selected for?

Answer 12

diversifying aka disruptive

Question 13

what kind of mcules rotate plan-polarized light?

Answer 13

chiral

Question 14

what is an amino acid that is achirla?

Answer 14

glycine

Question 15

what does the spleen do?

Answer 15

filters blood, acts like big lymph node

Question 16

what does reverse transcriptase do?

Answer 16

RNA to DNA

Question 17

what is an epimer?

Answer 17

in orgo, change one stereocenter, while the rest stays the same and you get an epimer. Eg. change OH gourp from equatorial to the other one.

Question 18

Substrate binding
Be clear on how this happens
competitive inhib
noncomp. inhib

Answer 18

the substrate binds to the enzyme’s active site
competitive inhib will compete with sub for active site
noncompetitive will bind directly to sub

Question 19

What is terminal velocity of object in vacuum?

Answer 19

undefined

Question 20

nuc addition vs substitution

Answer 20

addition involves replacing pi bond with 2 sigma bonds, usually in the case of C=O –> C-OH

substitution is removal of the LG

Question 21

An inducing B field will induce a current that does what?

Answer 21

a current whose B would oppose the inducing field.

If a B is going into the page at the center of a rectangular wire, which direction will the current go? Counterclockwise to induce a B that comes out of the page.

Question 22

What does it mean when a virus replicates via lysogenic cylce?

Answer 22

The virus comes into the cell and it integrates its DNA or RNA into the host genome

Question 23

what’s the pka range of carboxy acid group on amino acid?

pka range of amino group on amino acid?

Answer 23

2-3

9-10

Question 24

what is the order of the ear parts?

Answer 24

Eardrum, incus, oval window, cochlea

EIOC - think it’s a really awful noise to hear

Question 25

are liquids compressible? are gases?

Answer 25

no yes

Question 26

What is more polar, aldehyde or alcohol?

Answer 26

alcohol...think aldehyde has O double bonded so it's more content than OH which is more free

Question 27

what does enzyme catalase break down?

Answer 27

peroxide in peroxisomes that accumulate due to cell processes

Question 28

what do tendons connect?

Answer 28

muscle to bone

Question 29

what kind of solvent is best for recrystallization

Answer 29

solvent in which the anylate is only partially soluble, depending on temp. this way you can manipulate the temp to get the crystal

Question 30

what happens to freq of sound wave when it enters new medium?

Answer 30

nothing, f will stay the same

Question 31

for pH = -log[H], Ka must be what in order for pH to be accurate?

Answer 31

Ka must be very high, ie pretty strong acid, almost completely dissociates

Question 32

what is positive sense RNA?

Answer 32

it means it is the same sense as mRNA, it can be translated directly. No tx needed

Question 33

destructive interference occurs in waves that differ by what degree?

Answer 33

180

Question 34

halogens, whats the best leaving group? worst?

Answer 34

best is I | worst is F

Question 35

do bact make atp? What is the structure of most DNA carriers?

Answer 35

YES! the etc takes place on the plasma membrane most are circ

Question 36

dorsal ventral anterior posterior

Answer 36

back front head bottom

Question 37

what does the ductus venosus do?

Answer 37

in fetuses. it shunts blood from the placenta to the brain, it closes after birth

Question 38

If Q>Ksp, what happens? for multiple steps in a rxn, Ks = ?

Answer 38

the precip forms because the solution is oversat by the ions, forming precip. K is the solubility constant. Q is the ion product Ks = K1K2K3

Question 39

what immune response do endotoxins trigger?

Answer 39

innate immune response

Question 40

what facilitates secondary structure of protein?

Answer 40

H bonds on the backbone of peptide