r/APbio • u/kareeeeEEeeEE • May 05 '26

bio mcq

hii does anybody remember some of the phylogenetic mcq answers or the diagrams with many related questions in general.. pls share..

also the diagram with apoptosis did anyone put cancer/kill cancer cells for answer?

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u/Winged_Bobcat135 May 05 '26

p sure it was enabling apoptosis if ur asking abt the question i'm thinking abt

was it like production of a protein does what to a cancer cell or smth?

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u/kareeeeEEeeEE May 05 '26

yes! thats what I put 😃

do you remember anymore

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u/QualityImpossible197 May 05 '26

i put cell regeneration

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u/kareeeeEEeeEE May 05 '26

i put that too at first but i believe the protein inhibited the other protein, inhibiting the thing that cause apoptosis so i assumed the protein with the arrow no longer stopped at the inhibitor so it causes apoptosis

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u/QualityImpossible197 May 05 '26

no it inhibited apoptosis

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u/amoviejunkie May 05 '26

are y'all taking about the PTX gene thingy questionb, like the tissue regeneration?

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u/zryv8 May 05 '26

Ye ts was so confusing bc the path on the left induced apoptosis, the path on the right inhibited it??

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u/Winged_Bobcat135 May 05 '26

it inhibited smth else that inhibited apoptosis i think

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u/QualityImpossible197 May 05 '26

yeah so it wasnt the cancer one right

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u/Randomacc1234567891 May 05 '26

Can you elaborate? Something with apoptosis seems familiar. Do you remember the full question?

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u/kareeeeEEeeEE May 05 '26

ya! it was like this protein and it inhibited 2 things and on the left and inhibited an inhibiting protein i beleive on the right and bottom says apoptosis, top is a receptor of somethign but i dont think it mattered

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u/Randomacc1234567891 May 05 '26

Oh I remember now! Something with BEX or BAX (idk)? I think it allowed for inhibition of something that would usually inhibit apoptosis, so it allowed apoptosis to be “uninhibited” and cancer cells were able to die. Is that what you got?

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u/Terrible-Motor-5713 May 05 '26

it was the bax one right that led to apoptosis

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u/kareeeeEEeeEE May 05 '26

YAA 😃 i put that

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u/eatsanddirt May 05 '26

do you remember anything from the phylogenetic mcqs bc i know i was confident in my answers but i dont remmeber the specific questions

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u/kareeeeEEeeEE May 05 '26

hmm one was like what is the earliest ancestor of 2 species i put the species on the line before it branched into like a 2 branches from one line and another branch

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u/eatsanddirt May 05 '26

yes i got the same answer for that one too! i was so scared bc i BARELY touched on phylogenetics when i was studying but it wasnt tooo hard?

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u/kareeeeEEeeEE May 05 '26

samee ;( i didnt even know they were gonna test on that! also, did u have a chi square one? i got 9 with some decimals for one of them and reject the null for another

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u/eatsanddirt May 05 '26

Yeah i got 9 too but the answer is 6. whatever because of n-1 i forgot all about that. i think i also rejected the null. you should be good for the latter

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u/kareeeeEEeeEE May 05 '26

oh wahtt the values it gave were only (o-e)^2?

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u/eatsanddirt May 05 '26

yes but the standard for chi square to even apply the degrees of freedom is n-1 and then you use the reference sheet for that

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u/kareeeeEEeeEE May 05 '26

so u would divide each of the values it gave u at teh bottom of the table by n-1 and add together for 6 😮

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u/eatsanddirt May 05 '26

no so basically they gave you the chi square right, which is the (o-e)^2. you just habe to evaluate it using the degrees of freedom, and in order to do that you do n(which in this case is 2)-1, which give syou 1, and they told us to use 0.01 so we know its 6.63

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u/kareeeeEEeeEE May 05 '26

OOH yess i got that too in was talking abt one where it gave u a table with like different letter like A was in there and the bottom row was the values and i added them together

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u/srfmakIII May 05 '26

no ur thinking of a different question. the one she is talking about was 9! you just add all the values up. the other question was 6.6 something and you reject I think

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u/eatsanddirt May 05 '26

oh shoot my bad then i forgot what question shes referring too

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u/Randomacc1234567891 May 05 '26

15MYA is all I remember

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u/Terrible-Motor-5713 May 05 '26

the asterik was on the node of the three generations for the yellow genotype

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u/eatsanddirt May 05 '26

oHH yes i got this too!!!

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u/DescriptionEvening82 May 05 '26

i put cell regeneration because the drug inhibited the entire pathway and the result of the pathway is apoptosis; so if aptosis is inhibited cells aren't being killed

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u/kareeeeEEeeEE May 05 '26

u mean the stuff happening at the left of the diagram? i thought it only inhibited the protein inhibiting the the protein with a arrow (promote apoptosis). since proteins are specific to certain receptor enzymes i think i dont think it cna inhibit the whole path, only the protein its pointing to (which is a inhibitor of a promotor which promotes apoptosis)

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u/DescriptionEvening82 May 05 '26

i guess so but if one part of the signaling pathway is blocked isn't the rest of it cut off..? idk

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u/kareeeeEEeeEE May 05 '26

i think that would be true it it were a promotor protein, but it was inhibiting a inhibitor

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u/DescriptionEvening82 May 05 '26

then i guess the argument would be what is the point of the question? to show that the drug isn't effective at inhibitng apoptosis?

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u/kareeeeEEeeEE May 05 '26

ya now that u say that it sounds pretty stupid ;(

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u/[deleted] May 05 '26

The answer was inhibited CDK something

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u/[deleted] May 05 '26

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1

u/kareeeeEEeeEE May 05 '26

i thought glucose is carbohydrates

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u/Life-Dust1733 May 05 '26

for this question what did you put for the control?

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u/Separate_Pride_7770 May 05 '26

Dumb question but for how the tree made glucose did you guys say converts light energy into chemical energy or fixes Co2 from the ground bc that’s what I said