- Rep Power
Reader-generated subject test-type questions. Submit here
I don't know exactly where or how this will end up, but I think it would be a good idea to start it. Please submit as many items as you like. If and when it becomes too lengthy, and we gather enough items to start a word doc or pdf, I'll compile everything and post it. However, if this does take off, I don't expect it to do so until people start studying for the test again, whenever that might be.
NOTE: If you encounter a good question from a test-bank or other source, make sure you don't plagiarize it. To avoid copyright and nondisclosure issues, you might want to revise the question. Make sure the changes you make to the question do not affect the accuracy and legitimacy of the answer choice(s). If you do copy the question exactly, briefly cite the source.
Last edited by UltraSpiracle; 04-04-2005 at 05:13 PM.
- Rep Power
Re: Reader-generated subject test-type questions. Submit here
1. Of the following, which is the MOST likely consequence of a constitutively active membrane tyrosine kinase receptor?
a absence of ligand binding
b decreased phosphorylation of MAP kinase
c decrease in intracellular [Ca]
d increased activity of Ras protein
e loss of signaling
d - increased activity of Ras, since phosphorylation and activation of Ras is consequence of RTK signalling via the MAP kinase pathway.
Incorrect choices: a, since the constitutuvely active catalytic end of the receptor is intracellular, ligand binding would not likely be affected. b, MAP kinase is a downstream target and would likely exhibit increased phosphorylation, c since RTKs can influence levels of Ca via the PIP3 signaling cascade and e the "signal" would be amplified from the receptor.
2. In the conversion of 1 mole of fructose to pyruvate, inactivation of the enzyme triose phosphate isomerase would result in the net loss of
a 0 moles of ATP
b one mole of ATP
c two moles of ATP
c one mole of FADH2
e two moles of FADH2
b, one mole of ATP, since DHAP cannot be converted to G3P, and thus you lose the equivalent of half the molecule of fructose for the pathway. Note that if this had been starting with glucose, the net loss would be two moles of ATP.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By TriEcon in forum Graduate Admissions
Last Post: 12-20-2005, 03:42 PM
By 2gethervdo in forum GMAT Critical Reasoning
Last Post: 07-04-2005, 07:12 PM
By gmat_for_arun in forum GMAT Sentence Correction
Last Post: 06-28-2005, 06:27 AM
By jjomalls in forum GMAT
Last Post: 04-02-2004, 04:30 PM
Last Post: 01-30-2003, 07:48 AM
SEO by vBSEO ©2010, Crawlability, Inc.