ATI TEAS 7 SCIENCE SECTION 2024 FEBRUARY
ACTUAL EXAM QUESTIONS WITH ANSWERS
Arrange the units in increasing order of the size of distances they measure. - millimeter
- kilometer
-decameter
- centimeter
- hectometer - ANSWER - millimeter
- centimeter
- decameter
- hectometer
- kilometer
An atom of lithium has 3 protons, 4 neutrons, and 3 electrons. What is this atom's mass number? a. 3
b. 6
c. 10
d. 7 - ANSWER d. 7
A blood pressure reading of 120/70 mm Hg refers to the arterial pressures recorded during which of the following events? a. Atrial contraction/ventricular contraction
b. Atrial contraction/ventricular relaxation
c. Ventricular contraction/ventricular relaxation
d. Ventricular relaxation/atrial relaxation - ANSWER c. Ventricular contraction/ventricular relaxation
Which of the following is the gland on a hair follicle that supplies the hair shaft and the skin with oily secretions? a. Eccrine gland
b. Apocrine gland
c. Sebaceous gland
d. Ceruminous gland - ANSWER c. Sebaceous gland
Which of the following cells rid of the body of dust and other particles that enter the lungs? a. Alveoli
b. Macrophages
c. Sertoli cells
d. Erythrocytes - ANSWER b. Macrophages
Which of the following statements best explains why RNA inside a cell is almost never found as a single-stranded molecule? a. Alleles for genes are found in pairs, so their RNAs also pair up
b. RNA normally exists with its complementary strand in a double helix
c. RNA and DNA form hybrid pairs for all transcribing parts of chromosomes
d. Short stretches of complementary sequences can cause RNA to fold back on itself
- ANSWER d. Short stretches of complementary sequences can cause RNA to fold
back on itself
Which of the following actions are controlled by the autonomic nervous system? (Select all that apply.) a. Heart rate increases while running
b. Hand is withdrawn quickly after touching a hot surface
c. Stomach muscles contract to aid in digestion
d. Salivary glands release secretions in response to the presence of food
e. Blood vessels constrict to reduce the flow of blood to the skin - ANSWER a. Heart rate increases while running
c. Stomach muscles contract to aid in digestion
d. Salivary glands release secretions in response to the presence of food
e. Blood vessels constrict to reduce the flow of blood to the skin
A student is assigned the task of measuring the weight of one tennis ball using a scale for which the zero adjustment on the balance is not working. The student is given three balls and the can in which they were packaged. Which of the following strategies will provide the best determination of the correct weight? a. Weigh each ball separately and average the results b. Weigh the empty can, weigh the can with a ball in it, and compute the difference between the two c. Weigh the three balls together and divide by three
d. Weigh each ball separately, adjusting the beam weights from below first, and then from above. Then, average the results - ANSWER b. Weigh the empty can, weigh the can with a ball in it, and compute the difference between the two
Which of the following will likely happen in the case of blocked and injured ureters? a. Frequent urination b. No urine formation
c. Reduced flow of urine to the bladder
d. Bladder stretches due to an increase in urine volume - ANSWER c. Reduced flow of urine to the bladder
If an intensive property is independent of the amount of material being measured, which of the following is an example of an intensive property? a. Mass
b. Density
c. Volume
d. Length - ANSWER b. Density
Which of the following conditions might help a species to escape extinction in the face of changing environmental conditions, such as habitat destruction? a. Extreme specialization
b. Small populations
c. Narrow ecological niches d. Generalized distribution - ANSWER d. Generalized distribution
Which of the following statements is correct regarding the organisms in which photosynthesis and oxidative respiration occur?
a. Photosynthesis occurs only in plants, whereas oxidative respiration occurs in all life forms
b. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic eukaryotes c. Photosynthesis occurs in plants, whereas oxidative respiration occurs only in animals d. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes - ANSWER d. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes
Which component of a phospholipid gives it nonpolar characteristics? a. Glycerol molecule
b. Hydrogen bonds
c. Phosphate group
d. Carbon-hydrogen chains - ANSWER d. Carbon-hydrogen chains
Which of the following describes the role of regulatory genes? a. Regulatory genes control the expression of structural genes
b. Regulatory genes catalyze chemical reactions
c. Regulatory genes transfer information stored in DNA into proteins d. Regulatory genes code for membranes - ANSWER a. Regulatory genes control the expression of structural genes
Which of the following chemical bonds is found within a molecule of ammonia, NH3, given that N is a highly electronegative element and has a valence of 5? a. Nonpolar covalent bonds
b. Polar covalent bonds
c. Ionic bonds
d. Hydrogen bonds - ANSWER b. Polar covalent bonds
Which of the following hormones is produced in the ovaries? a. Estrogen
b. Vasopressin c. Prolactin d. Oxytocin - ANSWER a. Estrogen
Which of the following pathogens would be unaffected by treatment with an antibiotic
that inhibits ribosome function? a. Viruses b. Bacteria
c. Protists
d. Fungi - ANSWER a. Viruses
Acid reflux is a condition in which the gastric juices of the stomach flow backward into the esophagus. Which of the following causes acid reflux? a. The cardiac sphincter does not close tightly
b. Peristalsis occurs slowly in the esophagus
c. Excess gastric juices are produced by the stomach d. The pH value for gastric juices is increased - ANSWER a. The cardiac sphincter does not close tightly
Which of the following is a type of specialized antigen-processing cell that activates T-cells of the immune system? a. Plasma cells b. Thrombocytes c. Dendritic cells
d. Eosinophils - ANSWER c. Dendritic cells
Which of the following statements correctly describes the relationship between genes and chromosomes? a. Genes are DNA sequences found on chromosomes
b. Chromosomes contain genes composed of amino acids
c. Chromosomes are DNA sequences found on genes
d. Genes contain chromosomes composed of amino acids - ANSWER a. Genes are DNA sequences found on chromosomes
Which of the following is the value of the prefix milli- in the metric system? a. 10^-6 b. 1000
c. 10^-3
d. 0.1 - ANSWER c. 10^-3
"Dark matter" is a form of energy proposed to explain the repulsive forces between matter in the universe. It has never been observed directly. Which of the following is the best rationale for many scientists' contention that it exists? a. It serves as a working hypothesis to explain real observations in the universe
b. A basic scientific principle is to consider everything possible until proven otherwise
c. Since light energy exists in the universe, dark energy must also exist
d. Light energy from distant stars is very faint because it is absorbed by dark energy - ANSWER a. It serves as a working hypothesis to explain real observations in the universe
In human blood types, A and B alleles are codominant and O recessive. Which of the
following combinations of the parents' genotypes has the highest probability of producing a child with blood type O? a. Both parents are heterozygous and have blood type AB b. One parent is heterozygous for blood type A and the other is heterozygous for blood type B c. One parent is homozygous for blood type A and the other is homozygous for blood
type O d. One parent has blood type AB and the other is homozygous for blood type O - ANSWER b. One parent is heterozygous for blood type A and the other is heterozygous for blood type B
ACTUAL EXAM QUESTIONS WITH ANSWERS
Arrange the units in increasing order of the size of distances they measure. - millimeter
- kilometer
-decameter
- centimeter
- hectometer - ANSWER - millimeter
- centimeter
- decameter
- hectometer
- kilometer
An atom of lithium has 3 protons, 4 neutrons, and 3 electrons. What is this atom's mass number? a. 3
b. 6
c. 10
d. 7 - ANSWER d. 7
A blood pressure reading of 120/70 mm Hg refers to the arterial pressures recorded during which of the following events? a. Atrial contraction/ventricular contraction
b. Atrial contraction/ventricular relaxation
c. Ventricular contraction/ventricular relaxation
d. Ventricular relaxation/atrial relaxation - ANSWER c. Ventricular contraction/ventricular relaxation
Which of the following is the gland on a hair follicle that supplies the hair shaft and the skin with oily secretions? a. Eccrine gland
b. Apocrine gland
c. Sebaceous gland
d. Ceruminous gland - ANSWER c. Sebaceous gland
Which of the following cells rid of the body of dust and other particles that enter the lungs? a. Alveoli
b. Macrophages
c. Sertoli cells
d. Erythrocytes - ANSWER b. Macrophages
Which of the following statements best explains why RNA inside a cell is almost never found as a single-stranded molecule? a. Alleles for genes are found in pairs, so their RNAs also pair up
b. RNA normally exists with its complementary strand in a double helix
c. RNA and DNA form hybrid pairs for all transcribing parts of chromosomes
d. Short stretches of complementary sequences can cause RNA to fold back on itself
- ANSWER d. Short stretches of complementary sequences can cause RNA to fold
back on itself
Which of the following actions are controlled by the autonomic nervous system? (Select all that apply.) a. Heart rate increases while running
b. Hand is withdrawn quickly after touching a hot surface
c. Stomach muscles contract to aid in digestion
d. Salivary glands release secretions in response to the presence of food
e. Blood vessels constrict to reduce the flow of blood to the skin - ANSWER a. Heart rate increases while running
c. Stomach muscles contract to aid in digestion
d. Salivary glands release secretions in response to the presence of food
e. Blood vessels constrict to reduce the flow of blood to the skin
A student is assigned the task of measuring the weight of one tennis ball using a scale for which the zero adjustment on the balance is not working. The student is given three balls and the can in which they were packaged. Which of the following strategies will provide the best determination of the correct weight? a. Weigh each ball separately and average the results b. Weigh the empty can, weigh the can with a ball in it, and compute the difference between the two c. Weigh the three balls together and divide by three
d. Weigh each ball separately, adjusting the beam weights from below first, and then from above. Then, average the results - ANSWER b. Weigh the empty can, weigh the can with a ball in it, and compute the difference between the two
Which of the following will likely happen in the case of blocked and injured ureters? a. Frequent urination b. No urine formation
c. Reduced flow of urine to the bladder
d. Bladder stretches due to an increase in urine volume - ANSWER c. Reduced flow of urine to the bladder
If an intensive property is independent of the amount of material being measured, which of the following is an example of an intensive property? a. Mass
b. Density
c. Volume
d. Length - ANSWER b. Density
Which of the following conditions might help a species to escape extinction in the face of changing environmental conditions, such as habitat destruction? a. Extreme specialization
b. Small populations
c. Narrow ecological niches d. Generalized distribution - ANSWER d. Generalized distribution
Which of the following statements is correct regarding the organisms in which photosynthesis and oxidative respiration occur?
a. Photosynthesis occurs only in plants, whereas oxidative respiration occurs in all life forms
b. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic eukaryotes c. Photosynthesis occurs in plants, whereas oxidative respiration occurs only in animals d. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes - ANSWER d. Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes
Which component of a phospholipid gives it nonpolar characteristics? a. Glycerol molecule
b. Hydrogen bonds
c. Phosphate group
d. Carbon-hydrogen chains - ANSWER d. Carbon-hydrogen chains
Which of the following describes the role of regulatory genes? a. Regulatory genes control the expression of structural genes
b. Regulatory genes catalyze chemical reactions
c. Regulatory genes transfer information stored in DNA into proteins d. Regulatory genes code for membranes - ANSWER a. Regulatory genes control the expression of structural genes
Which of the following chemical bonds is found within a molecule of ammonia, NH3, given that N is a highly electronegative element and has a valence of 5? a. Nonpolar covalent bonds
b. Polar covalent bonds
c. Ionic bonds
d. Hydrogen bonds - ANSWER b. Polar covalent bonds
Which of the following hormones is produced in the ovaries? a. Estrogen
b. Vasopressin c. Prolactin d. Oxytocin - ANSWER a. Estrogen
Which of the following pathogens would be unaffected by treatment with an antibiotic
that inhibits ribosome function? a. Viruses b. Bacteria
c. Protists
d. Fungi - ANSWER a. Viruses
Acid reflux is a condition in which the gastric juices of the stomach flow backward into the esophagus. Which of the following causes acid reflux? a. The cardiac sphincter does not close tightly
b. Peristalsis occurs slowly in the esophagus
c. Excess gastric juices are produced by the stomach d. The pH value for gastric juices is increased - ANSWER a. The cardiac sphincter does not close tightly
Which of the following is a type of specialized antigen-processing cell that activates T-cells of the immune system? a. Plasma cells b. Thrombocytes c. Dendritic cells
d. Eosinophils - ANSWER c. Dendritic cells
Which of the following statements correctly describes the relationship between genes and chromosomes? a. Genes are DNA sequences found on chromosomes
b. Chromosomes contain genes composed of amino acids
c. Chromosomes are DNA sequences found on genes
d. Genes contain chromosomes composed of amino acids - ANSWER a. Genes are DNA sequences found on chromosomes
Which of the following is the value of the prefix milli- in the metric system? a. 10^-6 b. 1000
c. 10^-3
d. 0.1 - ANSWER c. 10^-3
"Dark matter" is a form of energy proposed to explain the repulsive forces between matter in the universe. It has never been observed directly. Which of the following is the best rationale for many scientists' contention that it exists? a. It serves as a working hypothesis to explain real observations in the universe
b. A basic scientific principle is to consider everything possible until proven otherwise
c. Since light energy exists in the universe, dark energy must also exist
d. Light energy from distant stars is very faint because it is absorbed by dark energy - ANSWER a. It serves as a working hypothesis to explain real observations in the universe
In human blood types, A and B alleles are codominant and O recessive. Which of the
following combinations of the parents' genotypes has the highest probability of producing a child with blood type O? a. Both parents are heterozygous and have blood type AB b. One parent is heterozygous for blood type A and the other is heterozygous for blood type B c. One parent is homozygous for blood type A and the other is homozygous for blood
type O d. One parent has blood type AB and the other is homozygous for blood type O - ANSWER b. One parent is heterozygous for blood type A and the other is heterozygous for blood type B
