Search found 36 matches

by avo
Wed Jul 03, 2019 12:04 am
Forum: Post Questions About Exams and QBank
Topic: 2000Q Book: General Chemistry #1344
Replies: 1
Views: 739

2000Q Book: General Chemistry #1344

Hi guys, I'm having trouble understanding the logic behind the right answer here. To my understanding, oxidizing and reducing reagents want to be reduced and oxidized, respectively. If the table listed gives standard reduction potentials, I would've thought the oxidizing/reducing reagents should've ...
by avo
Mon Jul 01, 2019 10:20 pm
Forum: Post Questions About Exams and QBank
Topic: 2000Q Book: Biochemistry #577
Replies: 1
Views: 691

2000Q Book: Biochemistry #577

Hi! I'm not sure if I found an error or if I'm just starting to get exhausted from looking at figures! In noncompetitive inhibition, Km would stay the same but Vmax would decrease. Because of this, I would've anticipated a higher y intercept, but no change in the x intercept and would've selected D....
by avo
Mon Jul 01, 2019 10:16 pm
Forum: Post Questions About Exams and QBank
Topic: 2000Q Book: Biochemistry #576
Replies: 1
Views: 635

2000Q Book: Biochemistry #576

Hi! I got the answer right (phew), but kind of got there with a different reasoning (uh-oh!). I chose none of the above because I was thinking about how uncompetitive inhibition would cause a decrease in Km, which would promote an increase in the rate of reaction. However, I also realized that techn...
by avo
Mon Jul 01, 2019 10:13 pm
Forum: AAMC Resources
Topic: Bio Qpack 1: Question 92
Replies: 2
Views: 797

Re: Bio Qpack 1: Question 92

Oh wow! That makes much more sense now! I was staring at the question for a good 15 minutes with no progress and am glad I asked here. Thanks for pointing this out!
by avo
Mon Jul 01, 2019 1:22 am
Forum: AAMC Resources
Topic: Biology QPack Vol. 2: #5
Replies: 1
Views: 646

Biology QPack Vol. 2: #5

Hello!

I'm a bit confused with the answer for this question. At a concentration of 1.5uM, that is when we have a net rate of 0 altogether, but that choice doesn't pop up anywhere in the answer choices.
by avo
Sun Jun 30, 2019 11:21 pm
Forum: AAMC Resources
Topic: Bio Qpack 1: Question 92
Replies: 2
Views: 797

Bio Qpack 1: Question 92

Hi! I'm having a lot of trouble understanding the rationale behind the explanation for the answer. Namely, I'm not entirely sure how the text in the right answer is possible, since both genotypes are XY, I don't know how the X chromosome can only passed on to half their offspring for one genotype, b...
by avo
Sat Jun 29, 2019 10:19 pm
Forum: General Discussion & FAQ
Topic: TLC/HPLC/RP-HPLC Question
Replies: 1
Views: 925

TLC/HPLC/RP-HPLC Question

Hello! I'm having some trouble understanding what exactly are mobile and stationary phases for the three tests above. I know it's a great way to view the polarities of compounds and NOT isolate them, but I don't understand what it means for a mobile or stationary phase to be polar/nonpolar and the s...
by avo
Fri Jun 28, 2019 4:41 am
Forum: Post Questions About Exams and QBank
Topic: 2000Q Book: Biology #152
Replies: 1
Views: 682

2000Q Book: Biology #152

Hi guys! So I'm having trouble understanding the logic behind the answer for question 152 in the 2000Q Book... The question says 845/1000 people lack a receptor, and the allele for that receptor is dominant. To my understanding, that means the q^2 = 0.845. However, the explanation for the answer say...
by avo
Thu Jun 27, 2019 9:32 pm
Forum: Post Questions About Exams and QBank
Topic: 2000Q Book: Organic Chemistry #1810
Replies: 1
Views: 724

2000Q Book: Organic Chemistry #1810

Hi! I'm in need of some clarification about how to finding the number of diastereomers in a molecule. To solve this question, and other questions like these, is it fair to say that the number of diastereomers in a molecule is the number of stereoisomers minus two? I say minus two because of the pair...
by avo
Thu Jun 27, 2019 7:09 pm
Forum: General Discussion & FAQ
Topic: Organic Chemistry: Chiral Carbons Question
Replies: 1
Views: 725

Organic Chemistry: Chiral Carbons Question

Hello! I'm having a bit of trouble conceptualizing chiral carbons for cyclic molecules. I know that by definition, a chiral carbon is connected to four separate groups. In the context of cyclic compounds, how can we have chiral carbons if two sides of a carbon will eventually meet each other in the ...