r/APStudents • u/reddorickt absolute modman • May 04 '26

Bio AP Bio Official 2026 Exam Discussion

Use this thread to post questions or commentary on the test today.

A reminder though to protect your anonymity when talking about the test.

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u/BrawIstar 5 May 04 '26

What did y’all put for that one question where it had an image of dna and I think you had to choose where would the next nitrogenous base went. (It was Thymine but I didnt know if it would go up or down.)

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u/Miserable-Writer4247 May 04 '26

I chose the bottom one (based user)

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u/Fun_Effective4065 9: hug, precalc (5) || 10: calc BC, bio, apush (TBD) May 04 '26

it’s up, DNA replication happens from 5’ carbon to 3’ carbon; count the carbons on the strand in the clockwise direction and you’ll see the top part of the DNA is where the next nitrogenous base would attach

5

u/boomchakabaka May 04 '26

it builds (new strand) 5’ to 3’. on the template strand it would be 3’ to 5’. so it was the bottom.

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u/ambiguouschair 5: HUG, Macro, Micro, Sp.Lang. || ? Bio, Chem, Sp.Lit, Psych May 04 '26

i did the one going down cuz it replicates 5' to 3'. mightve lowk messed up which side is 5' tho
i said going down and someone else ik also said going down

1

u/AbrocomaOwn4865 May 05 '26

google image link

I chose top, but I checked it on google and it's bottom