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NLN PAX SCIENCE PRACTICE TESTS/161 QUESTIONS AND ANSWERS (A+)
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NLN PAX SCIENCE PRACTICETESTS/161 QUESTIONS AND
ANSWERS (A+)
A person blows his breath into a straw that is placed in
limewater. The limewater becomes cloudy because the
person's breath contains: - √Answer :carbon dioxide
Quiz :A person who was in an auto accident has formed
a blood clot at the site of the injury. One event that can
lead to formation of a blood clot is that: -
√Answer :ruptured platelets release thromboplastin
Quiz :A student focuses sunlight to a point with a thin
converging (convex) lens. Which of these direct
measurements can the student make as a result of this
experiment? - √Answer :the approximate focal length of
the lens
Quiz :In ecological succession, the first living thing to
colonize a hitherto barren area is called a: -
√Answer :pioneer organism
Quiz :Unicellular organisms that have a nucleus and can
swim with the aid of cilia are examples of: -
√Answer :protozoans
Quiz :Which of these conditions is associated with
smoking? - √Answer :emphysema
Quiz :Which of these quantities is most closely
associated with an object's inertia? - √Answer :Mass
,Quiz :Which of these sequences of anatomic
organization, from the simplest level to the most
complex, is the correct sequence? - √Answer :From
tissue, organ, organ system to organism
Quiz :Which part of the cell structure controls the
passage of materials into and out of the cell? -
√Answer :Plasma membrane
Quiz :While working in the chemistry laboratory, a
student spills dilute hydrochloric acid on her hand. What
is the first action this student should take? -
√Answer :Flush her hand with large quantities of water
Quiz :Within a living cell, the oxygen (O2) from a mixture
of O2 and carbon dioxide (CO2) is used up. This
creates a concentration gradient across the cell
membrane, drawing O2 across the membrane from the
outside in, a process known as - √Answer :Diffusion
Quiz :You cut your finger rather deeply while slicing an
apple. Which of these actions should you take first? -
√Answer :Wash the wound continuously with cold
running water
Quiz :30 students in a class carefully measure the
length and width of 20 peanut shells. They also count
the number and note the size of the peanuts inside. This
information is recorded on various graphs showing the
numbers of nuts and the different sizes. The collected
evidence of the peanuts gives the students an idea of
the extent of: - √Answer :variation within a species
, Quiz :A *tincture* is a solution in which: -
√Answer :alcohol is the solvent
Quiz :All the glucose filtered from the blood in the
glomerulus into the Bowman's capsule of the kidney
nephron is returned to the tissue fluid while passing
along the proximal tubule. This rapid return is effected
by the process of: - √Answer :active transport
Quiz :If the night temperature drops 50 degrees, the
roadrunner's internal energy-conservation permits a
lowering of body temperature to: - √Answer :94°F
Quiz :1 kilogram (kg) of solid X at 10C and 1 kg of solid
Y 10C each absorb 5 joules of heat energy. The final
temperatures on X and Y is 15C and 20C, respectively.
Compared to X, Y must have a lower:F -
√Answer :specific heat
Quiz :A woman suddenly chokes on a piece of food and
clutches frantically at her throat. An immediate remedy
is to: - √Answer :apply quick, hard pressures
successively to her abdomen, just below her diaphragm
Quiz :An unknown gas is more dense than air, does not
support combustion, and turns a limewater solution
cloudy. This gas is most probably: - √Answer :carbon
dioxide
Quiz :Night blindness in humans is caused by a lack of:
- √Answer :Vitamin A
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