ATI TEAS VII ONLINE PRACTICE B –
SCIENCE EXAM QUESTIONS WITH
CORRECT ANSWERS
Which of the following is a type of specialized antigen-processing cell that activates T-
cells of the immune system?
Plasma cells
Thrombocytes
Dendritic cells
Eosinophils - Answer-Dendritic cells
Dendritic cells process antigens and display them on surface receptors to helper T-cells
of the immune system. Helper T-cells then activate cytotoxic T-cells and B-cells.
Therefore, dendritic cells link the passive and active immune system.
Which of the following procedures is an appropriate negative control for testing the
hypothesis that air contains bread mold spores?
Seal slices of bread in a container to minimize air contact.
Place slices of bread in a refrigerated environment.
Add ingredients to the bread recipe that will slow mold growth.
Expose a different mold-supporting medium to air. - Answer-Seal slices of bread in a
container to minimize air contact.
A negative control verifies the testing environment. Here, the testing environment is the
air. Therefore, excluding air from the bread in the container is the appropriate negative
control.
Which of the following actions are controlled by the autonomic nervous system? (Check
all that apply)
Heart rate increases while running.
Hand is withdrawn quickly after touching a hot surface.
Stomach muscles contract to aid digestion.
Salivary glands release secretions in response to the presence of food.
Blood vessels constrict to reduce the flow of blood to the skin. - Answer-Heart rate
increases while running
Stomach muscles contract to aid digestion
Salivary glands release secretions in response to the presence of food
Blood vessels constrict to reduce the flow of blood to the skin
, A chlorine atom has 17 electrons and 17 protons. It forms and ionic bond with sodium
and gains a negative charge. Which of the following is true for the chloride ion?
It is an anion with 18 electrons and 17 protons.
It is an anion with 18 electrons and 18 protons.
It is a cation with 17 electrons and 18 protons.
It is a cation with 18 electrons and 18 protons. - Answer-It is an anion with 18 electrons
and 17 protons.
When a chlorine atom gains an electron, its negative charge increases by 1 and it is
now called an anion.
Which of the following statements is correct regarding the organisms in which
photosynthesis and oxidative respiration occur?
Photosynthesis occurs only in plants, whereas oxidative respiration occurs in all life
forms.
Photosynthesis occurs in many prokaryotes and some eukaryotes, whereas oxidative
respiration occurs only in aerobic eukaryotes.
Photosynthesis occurs only in plants, whereas oxidative respiration occurs only in
animals.
Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative
respiration occurs only in aerobic prokaryotes and eukaryotes. - Answer-Photosynthesis
occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only
in aerobic prokaryotes and eukaryotes.
Photosynthesis occurs in bacteria, certain protists, and plants, and oxidative respiration
occurs in aerobes.
Which of the following anatomical planes divides the body into superior and inferior
portions?
Sagittal
Median
Frontal
Transverse - Answer-Transverse
Which of the following statements correctly describes the relationship between genes
and chromosomes?
Genes are DNA sequences found on chromosomes.
Chromosomes contain genes composed of amino acids.
Chromosomes are DNA sequences found on genes.
Genes contain chromosomes composed of amino acids. - Answer-Genes are DNA
sequences found on chromosomes.
SCIENCE EXAM QUESTIONS WITH
CORRECT ANSWERS
Which of the following is a type of specialized antigen-processing cell that activates T-
cells of the immune system?
Plasma cells
Thrombocytes
Dendritic cells
Eosinophils - Answer-Dendritic cells
Dendritic cells process antigens and display them on surface receptors to helper T-cells
of the immune system. Helper T-cells then activate cytotoxic T-cells and B-cells.
Therefore, dendritic cells link the passive and active immune system.
Which of the following procedures is an appropriate negative control for testing the
hypothesis that air contains bread mold spores?
Seal slices of bread in a container to minimize air contact.
Place slices of bread in a refrigerated environment.
Add ingredients to the bread recipe that will slow mold growth.
Expose a different mold-supporting medium to air. - Answer-Seal slices of bread in a
container to minimize air contact.
A negative control verifies the testing environment. Here, the testing environment is the
air. Therefore, excluding air from the bread in the container is the appropriate negative
control.
Which of the following actions are controlled by the autonomic nervous system? (Check
all that apply)
Heart rate increases while running.
Hand is withdrawn quickly after touching a hot surface.
Stomach muscles contract to aid digestion.
Salivary glands release secretions in response to the presence of food.
Blood vessels constrict to reduce the flow of blood to the skin. - Answer-Heart rate
increases while running
Stomach muscles contract to aid digestion
Salivary glands release secretions in response to the presence of food
Blood vessels constrict to reduce the flow of blood to the skin
, A chlorine atom has 17 electrons and 17 protons. It forms and ionic bond with sodium
and gains a negative charge. Which of the following is true for the chloride ion?
It is an anion with 18 electrons and 17 protons.
It is an anion with 18 electrons and 18 protons.
It is a cation with 17 electrons and 18 protons.
It is a cation with 18 electrons and 18 protons. - Answer-It is an anion with 18 electrons
and 17 protons.
When a chlorine atom gains an electron, its negative charge increases by 1 and it is
now called an anion.
Which of the following statements is correct regarding the organisms in which
photosynthesis and oxidative respiration occur?
Photosynthesis occurs only in plants, whereas oxidative respiration occurs in all life
forms.
Photosynthesis occurs in many prokaryotes and some eukaryotes, whereas oxidative
respiration occurs only in aerobic eukaryotes.
Photosynthesis occurs only in plants, whereas oxidative respiration occurs only in
animals.
Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative
respiration occurs only in aerobic prokaryotes and eukaryotes. - Answer-Photosynthesis
occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only
in aerobic prokaryotes and eukaryotes.
Photosynthesis occurs in bacteria, certain protists, and plants, and oxidative respiration
occurs in aerobes.
Which of the following anatomical planes divides the body into superior and inferior
portions?
Sagittal
Median
Frontal
Transverse - Answer-Transverse
Which of the following statements correctly describes the relationship between genes
and chromosomes?
Genes are DNA sequences found on chromosomes.
Chromosomes contain genes composed of amino acids.
Chromosomes are DNA sequences found on genes.
Genes contain chromosomes composed of amino acids. - Answer-Genes are DNA
sequences found on chromosomes.
