AP bio questions

Test Preparation AP Test Preparation
1

<p>Hi.</p>

<p>Just took a practice bio test on sparknotes.... (it's actually an SAT 2 test not AP but it doesn't matter)</p>

<p>I have some questions on the ones I got wrong:</p>

<p>1) The number of chromosomes found in a human germ cell is_______</p>

<p>I put 46 but sparknotes says that it is 23. They say that germ cells are egg and sperm cells, with a haploid number of chromosomes. Is this completely wrong?? I thought germ cells were diploid cells that went oogenesis and spermatogenesis to produce 4 haploid gametes...</p>

<p>2) All of the following describe the electron transport chain EXCEPT</p>

<p>(A) the reactions occur on the inner membrane of mitochondria
(B) the reactions occur on the outer membrane of mitochondria
(C) the reactions are an aerobic process
(D) hydrogen ions and electrons recombine and are then used to reduce oxygen to form water
(E) NADH is oxidized</p>

<p>I was stuck between A and B. Sparknotes says the correct answer is B.... is that true? (Can't trust this site's answers anymore lol).</p>

<p>3) The body regulates respiration rate based on blood pH and the concentration of</p>

<p>(A) CO2 in the blood
(B) O2 in the blood
(C) CO2 in alveolar sacs
(D) O2 in the brain
(E) lactic acid in the muscles</p>

<p>what's the correct answer?</p>

2

<p>For the first question, sparknotes is right
For the second question sparknotes is right-it’s talking about the outer membrane because in the electron transfer chain, the protons get pumped through the inner membrane (to the inter-membrane space.) The outer membrane has no involvement in respiration. I don’t know the answer to the last one but probably A because the CO2 forms carbonic acid, which the body needs to buffer by making us take shorter breaths.</p>

3

<p>I read that a signifigant portion of ap bio questions come from the labs; what is the best way to study for the labs?</p>

4

<p>Kartik ur wrong about number 1, conferred with brad and he said they are diploid, and also Kaplan+other internet sources say that germ cells are diploid. </p>

<p>And thanks for the carbonic acid kartik, I knew I was missing something. </p>

<p>adtobe: all the labs stem from concepts you learn in class, so they shouldn’t be much of a problem. However, if you want to really know the labs, read the “Lab” portion of your prep book… it should have one. PR has a mediocre section… not that detailed. I think Cliffs has a good one.</p>