BIOLOGY PRAXIS 5236 EXAM
QUESTIONS AND ANSWERS
Which of the following terms indicates the ecological role that an organism plays in a
community? - Correct Answers -Niche
Which of the following characteristics distinguishes members of the domain Eukarya
from members of the domains Archaea and Bacteria? - Correct Answers -The presence
of a nuclear envelope
Valine is typically classified as a hydrophobic amino acid because a valine molecule has
which of the following types of side chains? - Correct Answers -Nonpolar
A teacher asks students to describe how the data collected in an experiment are
typically used as evidence. Which of the following responses is the most accurate? -
Correct Answers -"The data are used to support or reject a hypothesis."
Which of the following biomes is characterized by long winters and short summers,
snow as the predominant form of precipitation, soil that is acidic and poor in nutrients,
and wooded areas made up mostly of evergreen trees with needlelike leaves? - Correct
Answers -Boreal forest
One strand of a certain segment of DNA has the following nucleotide sequence.
5 prime, A G A T G T C C A G T A, 3 prime5′⎯AGATGTCCAGTA⎯3′5′-
AGATGTCCAGTA-3′
The complementary strand in the same segment of DNA most likely has which of the
following nucleotide sequences? - Correct Answers -3′⎯TCTACAGGTCAT⎯5′
The overall process of aerobic cellular respiration is best described as the oxidation of
glucose to produce carbon dioxide and the reduction of oxygen to produce which of the
following? - Correct Answers -Water
A student uses stationary fans to investigate the effect of wind on water loss by plants.
The student divides the plants into three treatment groups and places each group in
front of a fan. The student sets the fan for each group to one of three different levels:
low, medium, or high. After 24 hours, the student determines the amount of water that
was lost by each plant. To create a bar graph of the results, the student should make
the height of each bar represent which of the following? - Correct Answers -The
average water loss for each treatment group
,Interphase is the part of the cell cycle that includes which of the following? - Correct
Answers -Replication of DNA
A model of secondary succession typically includes which of the following? - Correct
Answers -Changes in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus? -
Correct Answers -Ribosomes
DNA replication machinery
Wind turbines are used for which of the following activities? - Correct Answers -
Generating electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following?
- Correct Answers -Phosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular
respiration? - Correct Answers -Glycolysis
In a germinating seedling, the root grows downward into the soil. Which of the following
correctly explains this phenomenon? - Correct Answers -The root exhibits positive
gravitropism.
Which of the following best describes the role of transpiration in the water cycle? -
Correct Answers -It moves water from the soil to the atmosphere.
In which of the following cell types is a mutation most likely to have an impact on the
gene pool of a population? - Correct Answers -Sperm
Which of the following actions will best help maintain the diversity and abundance of
organisms in a terrestrial ecosystem? - Correct Answers -Preventing habitat destruction
A population of a certain animal species is found in a protected wildlife preserve. Which
of the following poses the greatest threat to the long-term survival of the population? -
Correct Answers -A decrease in the genetic diversity of the population
Which of the following describes the primary function of bone marrow in humans? -
Correct Answers -It is the source of new blood cells.
Which of the following is the best example of habitat fragmentation? - Correct Answers -
Building a highway through a forest
Ether can be used to anesthetize fruit flies. The flies are typically anesthetized in an
etherizer, a small chamber that contains an absorbent material onto which a few drops
, of ether are placed before the flies are introduced. Ether is volatile and highly
flammable. In which of the following locations should the ether be added to the
etherizer? - Correct Answers -In a fume hood, where the ether fumes are drawn to the
outside of the building through an exhaust system
A diploid organism has the genotype uppercase A, lowercase a, uppercase B,
lowercase b, uppercase C, lowercase cAaBbCc in regard to three unlinked genetic loci.
A normal gamete produced by the organism could have which of the following
genotypes? - Correct Answers -AbC
Which of the following statements best explains how insulin helps regulate blood
glucose levels in a healthy individual? - Correct Answers -It stimulates the uptake of
glucose by cells of the body.
The human population on Earth grew from an estimated one billion individuals to over
seven billion individuals over two hundred years. Based on the information presented,
which of the following was most likely true about the human population? - Correct
Answers -The growth rate was exponential.
A teacher is preparing a lesson to help students distinguish between scientific theories,
laws, and hypotheses. The teacher will provide several examples of each. Which TWO
of the following statements best illustrate scientific theories? - Correct Answers -
Evolutionary adaptations arise by natural selection.
The number of species on an island is determined by an equilibrium between the rates
of immigration and extinction.
Which of the following statements correctly describes a step in the processing of a
newly synthesized messenger RNA molecule in a eukaryotic cell? - Correct Answers -A
poly-A tail is added to one end of the molecule.
A certain protein hormone stimulates changes in gene expression in the liver cells of a
mouse but not in the kidney cells of the same mouse. Which of the following types of
molecules are most likely present in the liver cells but not in the kidney cells? - Correct
Answers -Specific cell surface receptors
Which of the following terms describes the collective interaction of turtles, insects, frogs,
birds, and water plants that live in and around the same pond? - Correct Answers -
Ecosystem
Which of the following best explains why the roots of a garlic bulb must be completely
removed before the bulb is imported into the United States? - Correct Answers -The
bulb is less likely to carry foreign root pathogens.
QUESTIONS AND ANSWERS
Which of the following terms indicates the ecological role that an organism plays in a
community? - Correct Answers -Niche
Which of the following characteristics distinguishes members of the domain Eukarya
from members of the domains Archaea and Bacteria? - Correct Answers -The presence
of a nuclear envelope
Valine is typically classified as a hydrophobic amino acid because a valine molecule has
which of the following types of side chains? - Correct Answers -Nonpolar
A teacher asks students to describe how the data collected in an experiment are
typically used as evidence. Which of the following responses is the most accurate? -
Correct Answers -"The data are used to support or reject a hypothesis."
Which of the following biomes is characterized by long winters and short summers,
snow as the predominant form of precipitation, soil that is acidic and poor in nutrients,
and wooded areas made up mostly of evergreen trees with needlelike leaves? - Correct
Answers -Boreal forest
One strand of a certain segment of DNA has the following nucleotide sequence.
5 prime, A G A T G T C C A G T A, 3 prime5′⎯AGATGTCCAGTA⎯3′5′-
AGATGTCCAGTA-3′
The complementary strand in the same segment of DNA most likely has which of the
following nucleotide sequences? - Correct Answers -3′⎯TCTACAGGTCAT⎯5′
The overall process of aerobic cellular respiration is best described as the oxidation of
glucose to produce carbon dioxide and the reduction of oxygen to produce which of the
following? - Correct Answers -Water
A student uses stationary fans to investigate the effect of wind on water loss by plants.
The student divides the plants into three treatment groups and places each group in
front of a fan. The student sets the fan for each group to one of three different levels:
low, medium, or high. After 24 hours, the student determines the amount of water that
was lost by each plant. To create a bar graph of the results, the student should make
the height of each bar represent which of the following? - Correct Answers -The
average water loss for each treatment group
,Interphase is the part of the cell cycle that includes which of the following? - Correct
Answers -Replication of DNA
A model of secondary succession typically includes which of the following? - Correct
Answers -Changes in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus? -
Correct Answers -Ribosomes
DNA replication machinery
Wind turbines are used for which of the following activities? - Correct Answers -
Generating electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following?
- Correct Answers -Phosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular
respiration? - Correct Answers -Glycolysis
In a germinating seedling, the root grows downward into the soil. Which of the following
correctly explains this phenomenon? - Correct Answers -The root exhibits positive
gravitropism.
Which of the following best describes the role of transpiration in the water cycle? -
Correct Answers -It moves water from the soil to the atmosphere.
In which of the following cell types is a mutation most likely to have an impact on the
gene pool of a population? - Correct Answers -Sperm
Which of the following actions will best help maintain the diversity and abundance of
organisms in a terrestrial ecosystem? - Correct Answers -Preventing habitat destruction
A population of a certain animal species is found in a protected wildlife preserve. Which
of the following poses the greatest threat to the long-term survival of the population? -
Correct Answers -A decrease in the genetic diversity of the population
Which of the following describes the primary function of bone marrow in humans? -
Correct Answers -It is the source of new blood cells.
Which of the following is the best example of habitat fragmentation? - Correct Answers -
Building a highway through a forest
Ether can be used to anesthetize fruit flies. The flies are typically anesthetized in an
etherizer, a small chamber that contains an absorbent material onto which a few drops
, of ether are placed before the flies are introduced. Ether is volatile and highly
flammable. In which of the following locations should the ether be added to the
etherizer? - Correct Answers -In a fume hood, where the ether fumes are drawn to the
outside of the building through an exhaust system
A diploid organism has the genotype uppercase A, lowercase a, uppercase B,
lowercase b, uppercase C, lowercase cAaBbCc in regard to three unlinked genetic loci.
A normal gamete produced by the organism could have which of the following
genotypes? - Correct Answers -AbC
Which of the following statements best explains how insulin helps regulate blood
glucose levels in a healthy individual? - Correct Answers -It stimulates the uptake of
glucose by cells of the body.
The human population on Earth grew from an estimated one billion individuals to over
seven billion individuals over two hundred years. Based on the information presented,
which of the following was most likely true about the human population? - Correct
Answers -The growth rate was exponential.
A teacher is preparing a lesson to help students distinguish between scientific theories,
laws, and hypotheses. The teacher will provide several examples of each. Which TWO
of the following statements best illustrate scientific theories? - Correct Answers -
Evolutionary adaptations arise by natural selection.
The number of species on an island is determined by an equilibrium between the rates
of immigration and extinction.
Which of the following statements correctly describes a step in the processing of a
newly synthesized messenger RNA molecule in a eukaryotic cell? - Correct Answers -A
poly-A tail is added to one end of the molecule.
A certain protein hormone stimulates changes in gene expression in the liver cells of a
mouse but not in the kidney cells of the same mouse. Which of the following types of
molecules are most likely present in the liver cells but not in the kidney cells? - Correct
Answers -Specific cell surface receptors
Which of the following terms describes the collective interaction of turtles, insects, frogs,
birds, and water plants that live in and around the same pond? - Correct Answers -
Ecosystem
Which of the following best explains why the roots of a garlic bulb must be completely
removed before the bulb is imported into the United States? - Correct Answers -The
bulb is less likely to carry foreign root pathogens.
