BIOLOGY PRAXIS 5236 EXAM 1 UPDATED QUESTIONS AND
ANSWERS
Which of the following terms indicates the ecological role that an organism plays in a community? -
CORRECT ANSWER✅✅✅Niche
Which of the following characteristics distinguishes members of the domain Eukarya from members of
the domains Archaea and Bacteria? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅"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 ANSWER✅✅✅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 ANSWER✅✅✅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
ANSWER✅✅✅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
ANSWER✅✅✅The average water loss for each treatment group
Interphase is the part of the cell cycle that includes which of the following? - CORRECT
ANSWER✅✅✅Replication of DNA
A model of secondary succession typically includes which of the following? - CORRECT
ANSWER✅✅✅Changes in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus? - CORRECT
ANSWER✅✅✅Ribosomes
DNA replication machinery
Wind turbines are used for which of the following activities? - CORRECT ANSWER✅✅✅Generating
electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following? - CORRECT
ANSWER✅✅✅Phosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular respiration? -
CORRECT ANSWER✅✅✅Glycolysis
In a germinating seedling, the root grows downward into the soil. Which of the following correctly
explains this phenomenon? - CORRECT ANSWER✅✅✅The root exhibits positive gravitropism.
Which of the following best describes the role of transpiration in the water cycle? - CORRECT
ANSWER✅✅✅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 ANSWER✅✅✅Sperm
, Which of the following actions will best help maintain the diversity and abundance of organisms in a
terrestrial ecosystem? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅A
decrease in the genetic diversity of the population
Which of the following describes the primary function of bone marrow in humans? - CORRECT
ANSWER✅✅✅It is the source of new blood cells.
Which of the following is the best example of habitat fragmentation? - CORRECT
ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅AbC
Which of the following statements best explains how insulin helps regulate blood glucose levels in a
healthy individual? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅Evolutionary adaptations arise by
natural selection.
ANSWERS
Which of the following terms indicates the ecological role that an organism plays in a community? -
CORRECT ANSWER✅✅✅Niche
Which of the following characteristics distinguishes members of the domain Eukarya from members of
the domains Archaea and Bacteria? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅"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 ANSWER✅✅✅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 ANSWER✅✅✅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
ANSWER✅✅✅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
ANSWER✅✅✅The average water loss for each treatment group
Interphase is the part of the cell cycle that includes which of the following? - CORRECT
ANSWER✅✅✅Replication of DNA
A model of secondary succession typically includes which of the following? - CORRECT
ANSWER✅✅✅Changes in species composition over time
Which TWO of the following are typically present in a bacterial cell but not in a virus? - CORRECT
ANSWER✅✅✅Ribosomes
DNA replication machinery
Wind turbines are used for which of the following activities? - CORRECT ANSWER✅✅✅Generating
electricity without burning fossil fuels
The nucleotides of a single strand of DNA are linked together by which of the following? - CORRECT
ANSWER✅✅✅Phosphodiester bonds
Which of the following pathways is common to both fermentation and aerobic cellular respiration? -
CORRECT ANSWER✅✅✅Glycolysis
In a germinating seedling, the root grows downward into the soil. Which of the following correctly
explains this phenomenon? - CORRECT ANSWER✅✅✅The root exhibits positive gravitropism.
Which of the following best describes the role of transpiration in the water cycle? - CORRECT
ANSWER✅✅✅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 ANSWER✅✅✅Sperm
, Which of the following actions will best help maintain the diversity and abundance of organisms in a
terrestrial ecosystem? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅A
decrease in the genetic diversity of the population
Which of the following describes the primary function of bone marrow in humans? - CORRECT
ANSWER✅✅✅It is the source of new blood cells.
Which of the following is the best example of habitat fragmentation? - CORRECT
ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅AbC
Which of the following statements best explains how insulin helps regulate blood glucose levels in a
healthy individual? - CORRECT ANSWER✅✅✅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 ANSWER✅✅✅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 ANSWER✅✅✅Evolutionary adaptations arise by
natural selection.
