ATI TEAS 7 Science Questions with Answers
1. Which of the following structures in the male reproductive system secretes a fluid that
nourishes and protects sperm?
A) Urethra
B) Prostate gland
C) Vas deferens
D) Epididymis
Answer: B) Prostate gland
2. Which of the following parts of the central nervous system releases chemicals that regulate the
pituitary gland?
A) Cerebellum
B) Hypothalamus
C) Spinal cord
D) Thalamus
Answer: B) Hypothalamus
3. Which of the following body systems is the primary system involved in preventing an
infection when a cut in the skin allows bacteria to enter the body?
A) The immune system
B) The endocrine system
C) The excretory system
D) The circulatory system
Answer: A) The immune system
4. Which of the following skin layers contains dead cells?
A) Papillary layer
B) Stratum basale
C) Stratum corneum
D) Reticular layer
Answer: C) Stratum corneum
5. Which of the following statements describes how bile salts aid during digestion?
A) Decrease the size of starches to aid in digestion
B) Increase the size of fat droplets to aid in digestion
C) Increase the size of starches to aid in digestion
D) Decrease the size of fat droplets to aid in digestion
Answer: D) Decrease the size of fat droplets to aid in digestion
6. When experimental results seem to only partly support a hypothesis, a researcher should
consider which of the following?
A) Formulating a scientific law
B) Manipulating the data
C) Exploring alternative explanations
D) Accounting for other researchers ' biases
Answer: D) Accounting for other researchers ' biases
7. Which of the following stem cells can differentiate into the largest number of different cell
types?
A) Somatic
B) Unipotent
C) Oligopotent
D) Pluripotent
Answer: D) Pluripotent
8. Scientists rely on which of the following to provide critical feedback when revising scientific
explanation?
A) Peer review
B) Null hypothesis
C) Dogma
D) Opinion
Answer: A) Peer review
9. Which of the following organs releases bicarbonate as response to the release of secretin by
the duodenum?
A) Gallbladder
B) Spleen
C) Pancreas
D) Liver
Answer: C) Pancreas
10. emphysema caused by damage to alveoli from toxins and pollutants is likely to result in the
body having difficulty performing which of the following actions?
A) Releasing histamine and acetylcholine
B) Producing enzymes
C) Absorbing food
D) Exchanging oxygen and carbon dioxide
Answer: D) Exchanging oxygen and carbon dioxide
11. Which of the following properties of water explains its solvent abilities for certain
substances?
A) High surface tension
B) Kinetic energy of liquid water molecules
C) High specific heat
D) Polarity of water molecules
Answer: D) Polarity of water molecules
12. Which of the following pathways best represents the expected flow of blood from the human
heart to an organ?
A) Blood pumped from the heart first enters arterioles that then merge to form arteries that
deliver blood to the organ
B) Blood pumped from the heart first enters arteries that then narrow to form arterioles that
deliver blood to capillaries of the organ
C) Blood pumped from the heart first enters veins that then narrow to form venules that deliver
blood to arteries of the organ
D) Blood pumped from the heart first enters arteries that then narrow to form veins that deliver
blood to the organ
Answer: B) Blood pumped from the heart first enters arteries that then narrow to form arterioles
that deliver blood to capillaries of the organ
13. Using the equation pH= - log [H+], a solution with a [H+] = 109 M has a pH of which of the
following?
A) 1
B) 5
C) 10
D) 9
Answer: D) 9
14. Which of the following types of bonds link base pair nucleotides within a double strand of
DNA?
A) Covalent
B) Peptide
C) Ionic
D) Hydrogen
Answer: D) Hydrogen
15. Metabolism is known as which of the following types of respiration?
A) Pulmonary
B) External
C) Cellular
D) Internal
Answer: C) Cellular
16. Which of the following regions of the body are the tibia and fibula?
A) Tarsal
B) Antecubital
C) Crural
D) Coxal
Answer: C) Crural
17. Which of the following digestive system structures releases sodium bicarbonate into the
small intestine, resulting in a change in the pH of chyme from acidic to basic?
A) Gallbladder
B) Pancreas
C) Liver
D) Appendix
Answer: B) Pancreas
18. A cell is placed in a hypertonic solution. Which of the following describes the resulting
osmosis?
A) There is a net flow of water into the cell
B) The net flow of water into and out of the cell is zero.
C) There is no flow of water.
D) There is a net flow of water out of the cell.
Answer: D) There is a net flow of water out of the cell.
19. Which of the following elements has the smallest atomic radius?
A) Si
B) C
C) Ge
D) Sn
Answer: B) C
20. An efficient way to block protein synthesis is by inhibiting which of the following?
A) Ribosomes
B) Glyoxysomes
C) Apoplasts
D) Lysosomes
Answer: A) Ribosomes
21. A student conducts an experiment in which he dissolves 1.0 grams () each of several
substances in 50 millimeters (mL) of water. He has 12 identical plastic cups of water. He places
1.0 g of salt into three of the cups,1.0 g of sugar into three of the cups, and 1.0 g of baking soda
into three of the cups. The three remaining cups contain only water. He places all the cups in a
freezer and records the temperature of the water in each cup every 15 minutes for 4 hours.
Which of the following questions is the student most likely investigating?
A) How does the volume of water affect the rate at which it cools?
B) What effect does cooling have on the solubility of different solutes?
C) How is the cooling rate of water affected by different solutes?
D) What effect do different concentrations of solute have on the freezing point of water?
Answer: C) How is the cooling rate of water affected by different solutes?
22. In a plant in which fuzzy leaves (F) are dominant smooth leaves (f) , which of following
crosses will produce only offspring with smooth leaves?
A) FF X FF
B) Ff X Ff
C) ff X ff
D) Ff X ff
Answer: C) ff X ff
23. Which of the following is a function of the circulatory system?
A) To manufacture antibodies
B) To break down toxins
C) To produce insulin
D) To transport hormones
Answer: A) To manufacture antibodies
24. In a double circulation system, which of the following describes a possible pathway of blood
flow through the pulmonary circulatory system?
A) Oxygenated blood flows toward the heart from the lungs.
B) Deoxygenated blood flows from organs and tissues of the body to the heart.
C) Oxygenated blood flows throughout the body.
D) Deoxygenated blood flows from the lungs to the heart
Answer: A) Oxygenated blood flows toward the heart from the lungs.
25. A doctor explains that a patient has pulled a muscle in his back. Which of the following could
injured in a patient's back?
A) Latissimus dorsi
B) Zygomaticus
C) Adductor magnus
D) Gastrocnemius
Answer: A) Latissimus dorsi
26. Which of the following hormones increases the heart rate in response to stress?
A) Epinephrine
B) Insulin
C) Testosterone
D) Glutamate
Answer: A) Epinephrine
27. Histones are proteins associated with which of the following?
A) Sperm cells
B) DNA
C) Hair follicles
D) Blood
Answer: B) DNA
28. Which of the following cellular organelles releases the energy contained in food?
A) Golgi apparatus
B) Mitochondria
C) Ribosomes
D) Centrioles
Answer: B) Mitochondria
29. Which of the following describes a process that occurs along the proximal tubules of a
nephron?
A) Glucose , lactate , and amino acids are reabsorbed.
B) Toxins in the filtrate are detoxified.
C) Urea is actively reabsorbed.
D) Altered filtrate leaves the urinary system and the body.
Answer: A) Glucose , lactate , and amino acids are reabsorbed.
30. Which of the following is a function of the integumentary system?
A) Storage of fat
B) Release of minerals
C) Production of antibodies
D) Absorption of water
Answer: A) Storage of fat
31. A study found two processes , Process A and Process B, to be correlated. Which of the
following is true for these processes?
A) The study cannot indicate whether Process A and B have a negative relationship.
B) The study indicates that Process A causes Process B.
C) The study does not indicate a causal relationship between the processes.
D) The study cannot indicate whether Process A and B have a positive relationship
Answer: C) The study does not indicate a causal relationship between the processes.
32. Which of the following types of cells suppress immune responses?
A) Regulatory T-cells
B) Neutrophils
C) Plasma cells
D) Macrophages
Answer: A) Regulatory T-cells
33. Which of the following are the two major parts of the nervous system?
A) Autonomic nervous system and central nervous system
B) Peripheral nervous system and somatic nervous system
C) Autonomic nervous system and somatic nervous system
D) Peripheral nervous system and central nervous system
Answer: D) Peripheral nervous system and central nervous system
34. Which of the following substances is excreted by sweat glands in response to the breakdown
of proteins and the formations ammonia?
A) Urea
B) Lysozymes
C) Sebum
D) Water
Answer: A) Urea
35. A student investigating the importance of wavelengths above and below the visible spectrum
for photosynthesis sets up an over a 2-month period , all with illumination at 1 meter distance
from plants grown with the same soil and watering conditions.
3 Arabidopsis plants exposed to ultraviolet light (UV)
3 Arabidopsis plants exposed to infrared light (IR)
3 Arabidopsis plants exposed to white light
At the end of the experiment , she finds that the IR treated plants are scorched , the UV treated
plants have , the plants are growing normally.
Which of the following statements is most likely to be correct?
A) Three plants do not provide sufficient replications to draw a conclusion.
B) Infrared light contains more energy than the other wavelengths.
C) Wavelength of light is the only variable that has been changed between groups
D) The wavelength of light does not affect photosynthesis.
Answer: C) Wavelength of light is the only variable that has been changed between groups
36. Which of the following hormones is responsible for regulating sodium reabsorption in the
kidneys?
A) Thyroxine
B) Erythropoietin
C) Calcitriol
D) Aldosterone
Answer: D) Aldosterone
37. How many times stronger is the hydrogen-ion concentration of a pH 4 solution as compared
with a pH 9 solution?
A) 5
B) 100,000
C) 0.000001
D) 50
Answer: B) 100,000
38. Which of the following describes the order of events in which bone heal?
A) A hematoma form — bony callus forms—a fibrocartilage callus forms—bone remodeling
occurs
B) A bony callus forms — hematoma forms — a fibrocartilage callus forms — bone remodeling
occurs
C) A hematoma forms — a fibrocartilage callus forms — a bony callus forms — bone
remodeling occurs
D) A fibrocartilage callus forms — hematoma forms - bone remodeling occurs — a bony callus
forms
Answer: C) A hematoma forms — a fibrocartilage callus forms — a bony callus forms — bone
remodeling occurs
39. Which of the following types of cells are most similar in function to cytotoxic T-cells?
A) Antigen -presenting cells
B) B cells
C) Dendritic cells
D) Natural killer cells
Answer: D) Natural killer cells
40. Which of the following organs filters excess solutes from the blood?
A) Kidney
B) Gallbladder
C) Spleen
D) Stomach
Answer: A) Kidney
41. Ice cubes are placed in a glass of water to cool water. The cooling effect the ice cubes on the
water is due to the heat being transferred in which of the following ways?
A) From the ice to the water by conduction
B) From the water to the ice by conduction
C) From the water to the ice by radiation
D) From the ice to the water by radiation
Answer: B) From the water to the ice by conduction
42. Which of the following describes the function of a neuron?
A) Stores potassium ions
B) Produces electrolytes
C) Creates electrical impulses
D) Transmits sensory information
Answer: D) Transmits sensory information
43. Sunlight can damage epithelial cells of the skins, but limited exposure to ultraviolet radiation
results in the beneficial production of which of the Following?
A) Vitamin D
B) Vitamin B
C) Vitamin K
D) Vitamin A
Answer: A) Vitamin D
44. Which of the following body systems breaks down proteins into amino acids?
A) Excretory
B) Endocrine
C) Circulatory
D) Digestive
Answer: D) Digestive
45. Which of the following occurs during inhalation?
A) The diaphragm moves downward.
B) The volume of the thoracic cavity decreases.
C) Air moves from areas of low pressure to areas of high pressure.
D) The ribcage lowers.
Answer: A) The diaphragm moves downward.
46. The process by which gametes combine to form a zygote is called which of the following?
A) Mitosis
B) Meiosis
C) Fertilization
D) Parthenogenesis
Answer: C) Fertilization
47. Which of the following types of membrane is associated with the skin?
A) Serous
B) Synovial
C) Cutaneous
D) Peritoneum
Answer: A) Serous
ATI TEAS 7 Science Questions with Answers and Explanations
1. An organism with chloroplasts in its cells is probably.
a. heterotroph
b. an autotroph c.
c. an herbivore
d. a primary consumer
Answer: b
Organisms that have chloroplasts in their cells carry on photosynthesis and are therefore
autotrophs. Autotrophs make their own food.
2. What property of water allows someone to fill a glass slightly above the rim with-out the water
flowing over?
a. specific gravity
b. capillarity
c. opacity
d. surface tension
Answer: d
Water molecules are polar. Due to the fact that O2 draws the electrons in the molecule toward
itself.
3. The spaces between neurons are called?
a. synapses
b. dendrites
c. inter-neurons
d. cell gaps
Answer: a
An impulse travels down the axon of a neuron and reaches the terminus. There, chemicals are
released in response, which travel across the synapse to the next neuron. Thus the impulse is
transmitted to the next neuron.
4. Which Group of chemicals is not normally found in most living things?
a. carbohydrates
b. proteins
c. silicates
d. nucleic acids
Answer: c
Carbohydrates, proteins, and nucleic acids (RNA and DNA) are all very important chemicals in
living things.
5. The alimentary canal is associated with the?
a. spinal cord
b. digestive system
c. urinary tract
d. birth canal
Answer: b
The alimentary canal begins at the mouth and ends at the anus.
6. The numerous villi in the small intestine serve to?
a. secrete enzymes for digestion
b. absorb water from dissolved foods
c. secrete hydrochloric acid to dissolve food
d. provide greater surface for absorption
Answer: d
The villi are tiny projections in the small intestine that increase the total surface area of the
intestine for absorption of digested nutrients.
7. As light passes obliquely from air to water, it is bent. This bending is called?
a. diffraction
b. reflection
c. refraction
d. dispersion
Answer: c
Refraction is the bending of light as it passes obliquely from one medium to another.
8. Which of the following organelles is not involved in protein synthesis?
a. ribsome
b. mitochondrion
c. rough endoplasmic reticulum
d. nucleus
Answer: d
The nucleus contains DNA. The ribosomes, located on the rough endoplasmic reticulum, are the
site for protein synthesis.
9. To be absorbed by cells, proteins must be changed to?
a. amino acids
b. sucrose
c. fatty acids
d. glycerol
Answer: a
Amino acids are the end products of protein digestion and are small enough to be absorbed.
10. A neuron that transmits impulses from the receptors to the spinal cord is called?
a. motor neuron
b. an associative neuron
c. an interneuron
d. a sensory neuron
Answer: d
A sensory neuron conveys a message from a sensory organ to the spinalcord, which transmits the
message via a motor neuron to the effector muscle.
11. Which group of organisms help prevent the accumulation of organic wastes in nature?
a. rabbits
b. mosses
c. bacteria
d. ferns
Answer: c
Bacteria comprise the decomposer portion of the food chain.
12. As the eardrum is made to vibrate more rapidly, the sound is perceived as?
a. louder in intensity
b. softer in intensity
c. higher in pitch
d. lower in pitch
Answer: c
High-pitch sounds are heard when the receptor cells closer to the oval window are stimulated,
and low-pitch sounds result from the stimulation of the cells that are farther down the cochlea.
ATI TEAS 7 Science Terms and Definitions
1. cellular energy
Answer: Photosynthesis & cellular respiration results in formation of for an organism
2. Photosynthesis
Answer: is the process carried out by green plants, green algai & certain bacteria, which energy
from the sunlight is trapped by green pigment Chlorophy 2 & use for synthesis of glucose
3. Chlorophyll
Answer: Green pigment in plants
4. chloroplast
Answer: these organisms are able to carry out photosynthesis due to specialized organelle
5. adenosine triphospate (ATP)
Answer: In chloroplast, carbon dioxide, water & energy from the sun are used to produce?
6. ATP
Answer: ______ is cellular fuel that provide energy to produce glucose from carbon dioxide,
water & liberation O2
7. autotroph
Answer: Organism that is able to produce its own food & use photosynthesis to live
8. Cellular respiration
Answer: _________ uses 1 end products of photosynthesis, glucose to produce ATP for cells
9. Heterotrophs
Answer: cellular respiration is used by ______. They cannot produce their own food.
10. Glycolysis
Answer: During cellular respiration, glucose is broken down by the process of _________ which
transfers some of the energy in glucose to ATP.
11. Citric Acid cycle
Answer: End - product of glycolysis are fed into ___________ (Krebs cycle), to produce more
ATP
12. Glycolysis & Citric acid cycle
Answer: Together ________ & ________ constitute cellular respiration ( cells use mitochondria
to carry out this cycle. During this process, oxygen is used up, while both water & carbon
dioxide are formed as by products. Carbon dioxide is expelled, but can used by autotrophs during
photosynthesis.
13. Photosynthesis
Answer: Chemical equation for cellular respiration is the reverse of that of
14. chloroplast
Answer: A new type of Algae has been discovered to determine whether or not this algae is an
autotroph, the scientist should observe for which of the following?
15. Nucleus
Answer: Chromosomes are located in the of a cell & contain stretches of DNA celled gene
16. chloroplast
Answer: A chloroplast is an organelle found in plant and algal cells that contains chlorophyll and
other pigments. It is responsible for photosynthesis, the process by which light energy is
converted into chemical energy stored in glucose, and also for producing oxygen as a byproduct.
Chloroplasts are key to the energy production and overall function of plant cells.
17. Nucleus
Answer: Chromosomes are located in the of a cell & contain stretches of DNA celled gene
18. Gene
Answer: contain coded info that controls heredity of a particular traits, such as eye or hair color.
19. Nitrogenous
Answer: Gene code that controls heredity , this code is made up of a sequence of bases of dna
20. Adenine (A), Thymine (T), Cytosine (C), Guanine (G)
Answer: The gene code that is made up of Nitrogenous bases of DNA
21. Codon
Answer: Each code is called & is composed of 3 bases
22. 64 different 3 letter combination can be formed for A,T,C,G
Answer: There are 64 codons, because
23. amino acid
Answer: Each codon matches to a specific
24. some codons match the same amino acids. Then a chain of amino acids then form a protein.
Answer: There are 20 different amino acids, so
25. 1 gene matches to 1 protein
Answer: Protein are work horses of the cell,
26. genetic trait
Answer: It is the protein that are reasoniable for the expression of
27. inherited differences between 1 person & another
Answer: The sum of all protein directed by the genes of an individual are responsible for
28. protein
Answer: Genetic traits are expressed through the actions of?
29. Genome
Answer: complete set of DNA for individual that contains all genes
30. * Error during DNA replication
* Via mutagen
Answer: Mutations in the genome occurs primarily by 2 mechanisms
31. DNA repair mechanism
Answer: _______ exist to reduce error rate down to less then 1 DNA base in every 10 9 to 10 12
base. ( less than 0.3% of gene in the human genome & often far less
32. DNA polymerase performs proofreading of newly synthesized strands & if it recognizes
mispairing of bases of bases it attempts to correct the problems by inserting the proper bases
Answer: To reduce error in dna,
33. Mismatch repair that scans over the DNA to find any mismatch of nitrogenous bases
Answer: Another back up plan a cell has if their is an error
34. of failure in mismatch repair
Answer: Certain types of cancer can occurs b/c
35. harmful chemical or ultraviolet rays
Answer: Mutagen can be caused by
36. Mutagen
Answer: Substance that induces mutation
37. back up
Answer: Cells have a ______ plan, which greatly reduces overall rate which mutation arises
38. genome
Answer: During DNA replication cells must double its DNA & make duplicate cope of the entire
39. base pairing
Answer: Synthesis of complementary strand DNA could occur solely through but would be
slow.
40. DNA Polymerase
Answer: Cells speed up by using an enzyme called
41. *DNA polymerase makes its way down DNA strand. ( Spontaneous errors may occur)
* If DNA polymerase adds DNA bases along a strand
Answer: DNA errors may occurs if:
42. 1000, 5
Answer: Human error occurs 1 out of _______ genes during each replication cycle or up to
_______% of gene in human genome
43. Excision repair
Answer: mechanism inspect DNA foe these types of damage & attempt to repair it
44. individual bases
Answer: Modification by mutagen occurs over a section of DNA as opposed to
45. mutated ones & allow dna polymeraseto generate a new, correct piece of dna.
Answer: Mechanism will cut the defective strand of DNA, remove those bases that are near
including
46. germ cell
Answer: Mutation are found in the
47. DNA Polymerase
Answer: Name the major enzyme responsible for DNA replication in cells
48. gametes
Answer: DNA in ____________ is the DNA passed onto futher generation
49. Phenotype
Answer: Physical expression of genetic trait in humans may be characteristics such as brown
hair or blue eyes
50. genotype
Answer: is an organism underlying genetic make up or code . Its blueprint for building &
maintaining all structures with in the cells of the body from small protein to metabolic activities
