Exam (elaborations)
USABO Exam Questions With Complete Solutions
- Course
- Institution
USABO Exam Questions With Complete Solutions
[Show more]
Content preview
USABO Exam Questions With Complete SolutionsAn unnamed acid has a pKa value of 4.76. Which of the
following is closest to the ratio of the concentration of its
protonated to deprotonated forms in a pH environment of 6.8?
Correct Answers 1:100
In the extracellular matrix of an animal cell, you would like to
test the binding partner of integrins in vitro. Integrins would
most likely require firm attachment to which of the above
option? Correct Answers Actin
Nitrogen fixation has the following net chemical reaction: N2 +
8e- + 8H+ + 16 ATP -> 2NH3 + H2 + 16ADP + 16Pi
If 1 kg of ATP (molar mass 507.2 g/mol) and 3 g of nitrogen gas
(molar mass 28 g/mol) are supplied as input, what is the
maximum yield of ammonia (molecular mass 17 g/mol)?
A. 1.8 g.
B. 2.5 g.
C. 3.6 g.
D. 4.2 g.
E. 4.9 g Correct Answers 3.6 g
Observe the seedlings growing below which have a loss of
function mutation in the ethylene receptor. Which of the
following statements are TRUE regarding this mutant's growth
response NOT being related to a triple response? Select one
response I,II,III,IV,V
I. This mutant will not respond to the exposure of ethylene under
any circumstances.
, II. This mutant has a constitutive activity where it leads to the
activation of kinase, which is important for the triple response.
III. This mutant has a constitutive activity where it leads to the
inactivation of kinase, which is important for the triple response.
IV. If this mutant is treated with aminoethoxyvinylglycine
(ethylene synthesis inhibitor), this mutant will be able to
undergo triple response.
V. If this mutant is treated with aminoethoxyvinylglycine
(ethylene synthesis inhibitor), this mutant will not respond to the
treatment and not undergo triple response. Correct Answers
I,III,V
Select the answer choice that correctly describes which chemical
species are oxidized, reduced, and phosphorylated in the process
of oxidative phosphorylation. Correct Answers Oxidized:
NADH & FADH2
Reduced: O2
Phosphorylated: ADP
T/F: Cytochrome a is more electronegative than cytochrome b
Correct Answers True
T/F: Cytochrome b is more electronegative than cytochrome c
Correct Answers True
T/F: FADH2 adds its electrons to complex III while NADH adds
its electrons in complex I. Correct Answers False
T/F: Ubiquinone proteins have a heme group to facilitate
electron transport Correct Answers False
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Classroom. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76669 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now