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USABO PRACTICE QUESTIONS AND ANSWERS
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USABO PRACTICE QUESTIONS AND ANSWERS
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Name: Score:182 Multiple choice questions
Term 1 of 182
Transport of which nutrient across the intestinal epithelium is by passive diffusion?
tryptophan
fructose
galactose
pyruvate
Term 2 of 182
In the fern life cycle, the dominant generation is the:
haploid gametophyte
nitrate
diploid sporophyte
sporophyte generation
Term 3 of 182
Tobacco mosaic virus has RNA rather than DNA as its genetic material. If the RNA genome
from a tobacco mosaic virus is mixed with proteins from a human rhinovirus, the result is a
mixed virus. If that virus could infect a cell and reproduce, what would you expect the resulting
viruses to be like?
Influenza Virus
Retrovirus
Tobacco Mosaic Virus
Smallpox
,Term 4 of 182
A ribozyme is a(an):
Dna molecule that acts as a structural protein.
Rna molecule that serves solely as a genetic template.
Protein that catalyzes reactions without rna involvement.
RNA molecule that functions as a enzyme.
Term 5 of 182
Insulin release results in all of the following physiological effects EXCEPT:
increase in oxygen concentration
decreased glycogen stores in liver cells
Some plants lack secondary growth
schwann cell
Term 6 of 182
The main explanation for the lack of a continuing abiotic origin of life on Earth today is that:
our oxidizing atmosphere is not conducive to spontaneous formation of complex
molecules
the lack of sunlight inhibits the growth of living organisms
the earth is too cold for any life to originate today
the presence of water prevents any chemical reactions necessary for life
,Term 7 of 182
When an ant in a colony dies, the live ants will throw the dead ant out of the anthill. If a live ant
from the colony, Ant X, is sprayed with a chemical characteristic of dead ants, the live ants will
repeatedly throw Ant X out of the anthill, until the chemical on Ant X wears off. What is the best
behavioral explanation of ant colony?
The chemical acts as a sign stimulus for a fixed action pattern
The live ants continue the behavior until they have been habituated
The megagametophyte of angiosperms
Two telomeres, one centromere, and a large number of origins of replication
Term 8 of 182
Which of the choices below correctly ranks [from least to greatest] the contribution of the
various ecosystems as to their "Average Net Primary Production per unit area (kcal/m2/yr)"?
Open ocean, savanna, temperate forest, tropical rain forest
Two telomeres, one centromere, and a large number of origins of replication
Sclerenchyma cells provide support for the plant body
Some plants lack secondary growth
Term 9 of 182
Color-blindness is a recessive, X-linked trait. A couple, who are both blood type A and who
both have normal vision, have a son who is blood type O and colorblind. What is the
probability that their next child will be a daughter who is blood type O and has normal vision?
3/4
6/11
1/8
50%
, Term 10 of 182
Which of the following statements is acceptable?
A long day plant will only flower in complete darkness
A long day plant will flower if it has over a half day of darkness interrupted by a short
flash of light
A long day plant requires continuous light for flowering
A long day plant will flower regardless of light conditions
Term 11 of 182
Which of the following is NOT a characteristic of all mammalian species?
Umbilical Cord
Corpus Luteum
Placenta
Amnion
Term 12 of 182
Given the following pedigree: What is (are) the possible mode(s) of inheritance? I. Autosomal
dominant II. Autosomal recessive III. X-linked dominant IV. X-linked recessive (question 25 of
2005 exam)
II or IV only
I,II, and III
I and III only
corpus luteum
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