PAX SCIENCE NLN EXAMS REVIEW AND
SOLUTIONS 2026
◉ The number of complete waves which pass a point in one second
is known as a : Answer: frequency
◉ The vertical columns on the periodic chart are known as: Answer:
groups
◉ When a sperm and egg join to form a zygote in humans, what
determines the sex of the child that is produced? Answer: The sperm
◉ When two atoms *share* a pair of electrons, the bond between
them is called: Answer: covalent
◉ When your muscles atrophy, they: Answer: waste away
◉ Which of these organisms has the most complex digestive system?
Answer: Earthworm
◉ Which of these processes occurs at a neuromuscular junction?
Answer: Impulse transmission
,◉ Which of these processes is used to free contaminated water of
bacteria? Answer: Treating it with chlorine
◉ Which of these organisms might be found in contaminated well
water? Answer: Giardia
◉ Which of these is the correct sequence of chambers through
which blood flows in the human heart and lungs? Answer: Right
atrium, right ventricle, lungs, left atrium, left ventricle
◉ Which of these changes occurs in the kidneys when a person
becomes dehydrated? Answer: The filtration rate of water remains
constant and the reabsorption of water increases.
◉ When a population is in Hardy-Weinberg equilibrium, which of
these conditions must be present? Answer: The population is
isolated from other populations
◉ Water freezes at 0C. On the Kelvin temperature scale, this is
equivalent to: Answer: 273K
◉ To determine the optimum conditions for the activity of a
digestive enzyme, it would be necessary to test its activity over a
range of: Answer: temperature, pH and substrate concentration
, ◉ The Pap test can detect cancer in the female reproductive tract at
an early stage, requiring cells scraped from: Answer: the cervix
◉ The most probable area of study that would show the prevalence
of mental illness in mid- Manhattan is that: Answer: epidemiology
◉ The meiotic division of cells leads to the production of cells that:
Answer: contain half the usual number of chromosomes
◉ The full set of genes in an individual is known as: Answer: the
human genome
◉ The boiling point of liquid nitrogen at one atmosphere pressure is
77 K. This temperature us equivalent to: Answer: neg196C
77K - 273K= 196C
◉ Substance Y is soluble only in nonpolar solvents and does not
conduct electricity, either in the solid or liquid phases. Y is most
probably Answer: a nonpolar substance
◉ Muscles are attached to bone by which of these structures?
Answer: Tendon
SOLUTIONS 2026
◉ The number of complete waves which pass a point in one second
is known as a : Answer: frequency
◉ The vertical columns on the periodic chart are known as: Answer:
groups
◉ When a sperm and egg join to form a zygote in humans, what
determines the sex of the child that is produced? Answer: The sperm
◉ When two atoms *share* a pair of electrons, the bond between
them is called: Answer: covalent
◉ When your muscles atrophy, they: Answer: waste away
◉ Which of these organisms has the most complex digestive system?
Answer: Earthworm
◉ Which of these processes occurs at a neuromuscular junction?
Answer: Impulse transmission
,◉ Which of these processes is used to free contaminated water of
bacteria? Answer: Treating it with chlorine
◉ Which of these organisms might be found in contaminated well
water? Answer: Giardia
◉ Which of these is the correct sequence of chambers through
which blood flows in the human heart and lungs? Answer: Right
atrium, right ventricle, lungs, left atrium, left ventricle
◉ Which of these changes occurs in the kidneys when a person
becomes dehydrated? Answer: The filtration rate of water remains
constant and the reabsorption of water increases.
◉ When a population is in Hardy-Weinberg equilibrium, which of
these conditions must be present? Answer: The population is
isolated from other populations
◉ Water freezes at 0C. On the Kelvin temperature scale, this is
equivalent to: Answer: 273K
◉ To determine the optimum conditions for the activity of a
digestive enzyme, it would be necessary to test its activity over a
range of: Answer: temperature, pH and substrate concentration
, ◉ The Pap test can detect cancer in the female reproductive tract at
an early stage, requiring cells scraped from: Answer: the cervix
◉ The most probable area of study that would show the prevalence
of mental illness in mid- Manhattan is that: Answer: epidemiology
◉ The meiotic division of cells leads to the production of cells that:
Answer: contain half the usual number of chromosomes
◉ The full set of genes in an individual is known as: Answer: the
human genome
◉ The boiling point of liquid nitrogen at one atmosphere pressure is
77 K. This temperature us equivalent to: Answer: neg196C
77K - 273K= 196C
◉ Substance Y is soluble only in nonpolar solvents and does not
conduct electricity, either in the solid or liquid phases. Y is most
probably Answer: a nonpolar substance
◉ Muscles are attached to bone by which of these structures?
Answer: Tendon
