to get a 4, how much percent do you need? 60%+?
@TopOne Yes I believe. Don’t worry about it because my friend didn’t finish all the questions for MC and FRQs and still ended up with a 5.
Man if they gave us 5 more minutes, I would’ve finished all the FRQs caused I didn’t have time to finish number 7.
i misread some of the questions, holy… but i hope i wrote the concepts correctly
For the olfactory one I said something to effect of, Alternative Splicing removes introns (non coded parts) and splices together exons (coding parts) through enzymes such as Splicisomes and SnERPs; However, what is treated as an intron can be treated as an exon or vice versa. This process allows a gene to code for multiple proteins which allows one to smell thousands of different smells even if one only has a few genes that code for olfactory receptors.
Would someone please post a picture (image sharing link maybe?) of the correct cladogram? I’m not sure if I got it right and I’m really worried about that one.
@CollageWhat polylepis is the loner. ferus and africanus are together to the right and the other two are together in the middle
What would I get if I said africanus is the loner and messed up the tree if I gave the right reason for part a, ie: most differences in cytochrome c= outgroup. I just read the chart wrong.
@xxjmodxx The whole phylogenetic tree is one point. So if you mess up even one thing, you get the whole point off.
@ChemFire085 Ok good cause I finished that question at the last second lol
What’s th answer for 8B because I put that the second immune response would be the same as the first since memory B cells are not created. Is this correct?
For the olfactory one i remember reading in the barrons that one pns nerve reacts to different impulses from different sensory nerves. So, logically if we only have 1000 olfactory genes and can smell several thousand it must be through the combination of the sensory olfactory nerves.
for the whole part a, can i still get 1 point if i explained but messed up the tree? since the whole part has 2 max. points
for the whole part a, can i still get 1 point if i explained but messed up the tree? since the whole part has 2 max. points
@ILDocter I put it would be slower than if you have memory B cells because antibodies aren’t created. You’re also right; I should’ve been more direct with that answer because I didn’t put that it would have the same response.
@ILDocter I just said that both would be slowed down by the lack of antibodies and memory cells
Just re the olfactory one, this article says that there is alternative splicing in olfactory genes: http://www.mimg.ucla.edu/faculty/black/(26)PIN%2065%20289-308%20(2001).pdf
Unfortunately I just said “RNA splicing” and then described alternative splicing and how it works. I should still get the points though.
@TopOne You only had to explain why you chose the outgroup I believe. So if you chose the outgroup correctly (d. poly or whatever), you will get the point.
I think I got 80% on the MC and 28 on the FRQ. Can I get a five with that? Also, I didn’t answer half of question 3 and I didn’t answer any of question 7. Could you have answered question one without really referring to any of the structures? I recall just saying sensory neuron, interneurons, and motor neurons. Will that suffice? Thanks!
regarding #3… could i say cdk’s(cell checkpoints) and both mitosis and meiosis starting with diploid cells be two similar events??