Transcript HSA Practice Problems

Q1 Assessment Practice
Questions
To test the effectiveness of a new medicine, a drug
company performed a study. Researchers from the
company gave pills that contained the new
medicine to one group of patients; they gave pills
that did not contain any medicine to another group
of patients. Why were the patients not told which
type of pill they were taking?
A.
B.
C.
D.
To keep patients from becoming angry
To prevent bias when collecting data
To prevent errors when collecting data
To keep patients from dropping out of the
study
A scientist is testing milk for the presence of
bacteria. Exactly 25 milliliters of a test
solution must be added to each milk sample.
Which of these instruments would most
accurately measure the volume of the test
solution?
A.
B.
C.
D.
A beaker
A test tube
A measuring cup
A graduated cylinder
In the human body, which of these
systems transports sugars to the cells
where they are used?
A.
B.
C.
D.
Excretory
Respiratory
Circulatory
Digestive
A student wants to perform an investigation
to determine the heart rate of a rabbit. The
teacher tells her the heart rate should be
about 100 beats per minute. How could this
information affect the investigation?
A.
B.
C.
D.
It could introduce bias
It could remove experimental error.
It could increase the accuracy of the data
It could reduce the number of measurements
needed.
Which of these supply the main energy
source used in cellular respiration?
A.
B.
C.
D.
Lipids
Amino acids
Nucleic acids
carbohydrates
The ability of the human body to regulate the
level of blood glucose is an example of:
A.
B.
C.
D.
Osmosis
Homeostasis
Binary Fission
Aerobic Respiration
When the cells of most organisms freeze
they burst. Which property of water causes
this occur?
A.
B.
C.
D.
Water is a universal solvent
Water change temperature rapidly
Water is less dense as a solid than as a liquid
Water is a nonpolar molecule
Students are conducting an experiment to
determine if sugars are present in foods.
They heat a test tube containing a sugar
solution in a beaker of water.
Which of these is an unsafe laboratory
practice in this experiment?
A. Heating the sugar solution in a closed test tube
B. Rinsing hands with water after handling the
materials
C. Using a test tube clamp to hold the test tube
D. Wearing safety goggles while heating the
sugar solution
Which statement describes the major
role of lipids within a cell?
A. They cause DNA to replicate
B. They move RNA in the cytoplasm
C. They catalyze chemical reactions in the cell
cytoplasm
D. They are the main structural components of
membranes
What molecule controls the rate of
photosynthesis?
A.
B.
C.
D.
Sugars
Enzymes
Fatty Acids
Nucleic Acids
A student washes her hands with antibacterial soap and water. Then
she touches the agar in a petri dish with her thumb. The agar contains
nutrients that support the growth of bacteria. Other students repeat the
procedure after washing their hands with three different kinds of
antibacterial soap. The petri dishes are kept warm overnight to allow
bacteria to grow. The next day the students count the number of
bacterial colonies in each dish.
Which of these questions are the students most likely trying to answer?
A.
B.
C.
D.
How long does it take soap to kill bacteria?
Which soap is most effective in killing bacteria?
Which nutrients are necessary to grow bacteria?
How many bacteria are on the average thumb?
A student washes her hands with antibacterial soap and water. Then
she touches the agar in a petri dish with her thumb. The agar contains
nutrients that support the growth of bacteria. Other students repeat the
procedure after washing their hands with three different kinds of
antibacterial soap. The petri dishes are kept warm overnight to allow
bacteria to grow. The next day the students count the number of
bacterial colonies in each dish.
What should be the effect of the soap in this experiment?
A.
B.
C.
D.
It should be toxic to the bacteria
It should help the bacteria to grow
It should change the pH of the agar
It should destroy the nutrients in the agar
A dog gets many nutrients from its food
including amino acids. Which of these can
be built directly using the amino acids?
A.
B.
C.
D.
Proteins
Carbohydrates
Lipids
Minerals
Students will conduct a laboratory experiment
using the following materials: a Bunsen burner, a
beaker of water, glass tubing, four test tubes
containing different chemicals, and rubber
stoppers. Which of these steps is most critical for
students to follow when using these materials in
the lab?
A.
B.
C.
D.
Wearing eye protection at all times
Writing the lab procedure in a notebook
Washing hands before starting the experiment
Placing a stopper on all test tubes before
heating them
Which of these are the repeating units that
form a DNA molecule?
A.
B.
C.
D.
Fatty acids
Nucleotides
Amino Acids
Chromosomes
A scientist is performing an investigation
funded by a company. Which of these would
be least likely to produce biased data?
A. Making the results please the company paying
for the research
B. Being open minded and honest throughout the
research project
C. Using only the data that supports the
hypothesis
D. Using personal opinions to decide the results
of the research
What vitamin is necessary for
blood clotting?
Healthy skin, eyes
A. Vit. A
B. Vit. D Bone growth
C. Vit. C Wound healing
D. Vit. K
Enzymes are specific to one ______,
and they bond at the __________of the
enzyme.
A.
B.
C.
D.
Product
Substrate
Reactant
Substrate
-
opening
active site
active site
enzymesubstrate complex
What happened to an
enzyme if it is at the incorrect
temperature?
A.
B.
C.
D.
Slows down
Speeds up
Does nothing
Bonds break, changes shape
If the enzyme Lactase was added to
lactose, what would happen to the
lactose/lactase mixture when tested
with Benedict’s solution?
A. It would be a blue color, negative for
monosaccharides
B. It would be a blue color, positive for starch
C. It would turn color, negative for starch
D. It would turn color, positive for
monosaccharides