USABO grind exam with comprehensive
questions and well elaborated correct
answers GRADED A+
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Common in most biomes? - correct ans:Vegetation with vertical layering
,Biome with most vertical layers - correct ans:Tropical rain forest
*Type: Application*
Although many chimpanzees live in environments containing oil palm nuts, members of only a few
populations use stones to crack open the nuts. The likely explanation is that:
a. the behavioral difference is caused by genetic differences between populations.
b. members of different populations have different nutritional requirements.
c. the cultural tradition of using stones to crack nuts has arisen in only some populations.
d. members of different populations differ in learning ability - correct ans:*Answer*: [c]
*Explanation:* read the question - it says "chimpanzees live in environments containing oil palm nuts"
meaning they all know how to use it ... this eliminates [b] and [d]. It is probably not genetic so the
answer is [c].
*Next Time:* If it says something about the habitat in the question, and mentions a species in the
habitat, then the species probably use the thing mentioned.
*Type: Application*
Although some sharks close their eyes just before they bite, their bites are on target. Researchers have
noted that sharks often misdirect their bites at metal objects and that they can find batteries buried
under the sand. This evidence suggests that sharks keep track of their prey during the split second
before they bite, in the same way, that:
a. a rattlesnake finds a mouse in its burrow.
b. an insect avoids being stepped on.
c. a star-nosed mole locates its prey in tunnels.
d. a platypus locates its prey in a muddy river. - correct ans:*Answer*: [d]
*Explanation:* The question says stuff about metal and batteries, so the shark senses metal. If it finds
buried batteries, then it can sense the prey without seeing it. The prey "buried" corresponds with being
under "muddy" water, so [d] is correct.
, *Next Time:* Generalize the stuff the question gives out, like the metal stuff in this question. Then,
make an analogy with the question and each choice, and the choice that MOST CLOSELY matches up is
correct.
Protease X can cleave - correct ans:other Protease X!
Predators are Keystone species if they - correct ans:feed on dominant species; keep it under control
*Type: Application*
An inhibitor of Complex II would cause all of the following EXCEPT:
a. An unchanged proton concentration in the inter-membrane space
b. Potential damage by Free Radicals
c. buildup of FADH2
d. Impaired Oxidative Phosphorylation - correct ans:*Answer*: [a]
*Explanation:* Although no Protons are pumped from Complex II, there are protons pumped at later
complexes. The other 3 choices would be true, and the proton gradient WILL be changed. As a result, [a]
is correct.
*Next Time:* Don't just think in the context of the problem and narrow yourself to something
mentioned in the problem (like Complex II); in other words, don't just think about Complex II. Think
about the ETC as a WHOLE. Analyzing the effects of the WHOLE thing and not just one of its parts can
yield the right answer.
*Type: Application*
If you found an individual with a genetic mutation that resulted in six protein complexes in the electron
complex chain, how might you expect the production of ATP in that individual to compare to an
individual with a normal four-complex electron transport chain?
a. Decrease
b. No change
c. Can't determine
d. Increase - correct ans:*Answer*: [c]
questions and well elaborated correct
answers GRADED A+
Professional Academic Assistance Services
Services Offered
Proctored Exam Assistance
Online Class Management (Full Course Support)
Exam Preparation & Study Materials
Assignments and Coursework Support
Essays and Research Papers
Discussion Posts and Replies
Common in most biomes? - correct ans:Vegetation with vertical layering
,Biome with most vertical layers - correct ans:Tropical rain forest
*Type: Application*
Although many chimpanzees live in environments containing oil palm nuts, members of only a few
populations use stones to crack open the nuts. The likely explanation is that:
a. the behavioral difference is caused by genetic differences between populations.
b. members of different populations have different nutritional requirements.
c. the cultural tradition of using stones to crack nuts has arisen in only some populations.
d. members of different populations differ in learning ability - correct ans:*Answer*: [c]
*Explanation:* read the question - it says "chimpanzees live in environments containing oil palm nuts"
meaning they all know how to use it ... this eliminates [b] and [d]. It is probably not genetic so the
answer is [c].
*Next Time:* If it says something about the habitat in the question, and mentions a species in the
habitat, then the species probably use the thing mentioned.
*Type: Application*
Although some sharks close their eyes just before they bite, their bites are on target. Researchers have
noted that sharks often misdirect their bites at metal objects and that they can find batteries buried
under the sand. This evidence suggests that sharks keep track of their prey during the split second
before they bite, in the same way, that:
a. a rattlesnake finds a mouse in its burrow.
b. an insect avoids being stepped on.
c. a star-nosed mole locates its prey in tunnels.
d. a platypus locates its prey in a muddy river. - correct ans:*Answer*: [d]
*Explanation:* The question says stuff about metal and batteries, so the shark senses metal. If it finds
buried batteries, then it can sense the prey without seeing it. The prey "buried" corresponds with being
under "muddy" water, so [d] is correct.
, *Next Time:* Generalize the stuff the question gives out, like the metal stuff in this question. Then,
make an analogy with the question and each choice, and the choice that MOST CLOSELY matches up is
correct.
Protease X can cleave - correct ans:other Protease X!
Predators are Keystone species if they - correct ans:feed on dominant species; keep it under control
*Type: Application*
An inhibitor of Complex II would cause all of the following EXCEPT:
a. An unchanged proton concentration in the inter-membrane space
b. Potential damage by Free Radicals
c. buildup of FADH2
d. Impaired Oxidative Phosphorylation - correct ans:*Answer*: [a]
*Explanation:* Although no Protons are pumped from Complex II, there are protons pumped at later
complexes. The other 3 choices would be true, and the proton gradient WILL be changed. As a result, [a]
is correct.
*Next Time:* Don't just think in the context of the problem and narrow yourself to something
mentioned in the problem (like Complex II); in other words, don't just think about Complex II. Think
about the ETC as a WHOLE. Analyzing the effects of the WHOLE thing and not just one of its parts can
yield the right answer.
*Type: Application*
If you found an individual with a genetic mutation that resulted in six protein complexes in the electron
complex chain, how might you expect the production of ATP in that individual to compare to an
individual with a normal four-complex electron transport chain?
a. Decrease
b. No change
c. Can't determine
d. Increase - correct ans:*Answer*: [c]
