ATI TEAS SCIENCE FINAL STUDY GUIDE
QUESTIONS AND COMPLETE ANSWERS 2026
◉ The measurement indicated by the line across the center of the
cell is best referred to as which of the following?
A. Area
B. Diameter
C. Volume
D. Radius Answer: B. Diameter
◉ Which of the following ions binds to the troponin complex,
initiating contraction of a muscle?
A. Potassium.
B. Calcium.
C. Phosphorus.
D. Sodium Answer: B. Calcium.
---
The other ions mentioned in the question do not have this specific
role in muscle contraction.
,Potassium ions are important for maintaining the resting membrane
potential of cells, but they do not bind to the troponin complex.
Phosphorus ions are important for energy metabolism, but they do
not bind to the troponin complex.
Sodium ions are important for generating action potentials, but they
do not bind to the troponin complex.
◉ Which of the following microorganisms lack their own metabolic
pathways and can only reproduce inside of a host cell?
A. Bacteria
B. Protozoa
C. Helminths
D. Viruses Answer: D. Viruses
◉ Which of the following is the atomic number of an atom that has
12 protons and 12 neutrons?
A. 24
B. 12
, C. 1
D. 144 Answer: B. 12
◉ Which of the following types of cells produce and release
antibodies?
A. Natural killer cells
B. Cytotoxic T-cells
C. Plasma B cells
D. Helper T-cells Answer: C. Plasma B cells
◉ Which of the following organic molecules contain both an amine
and carboxyl group?
A. Lipids
B. Chitin
C. Cellulose
D. Proteins Answer: D. Proteins
Proteins are made up of amino acids which are organic molecules
that contain both an amine functional group (-NH2) and a carboxylic
acid functional group (- COOH).
QUESTIONS AND COMPLETE ANSWERS 2026
◉ The measurement indicated by the line across the center of the
cell is best referred to as which of the following?
A. Area
B. Diameter
C. Volume
D. Radius Answer: B. Diameter
◉ Which of the following ions binds to the troponin complex,
initiating contraction of a muscle?
A. Potassium.
B. Calcium.
C. Phosphorus.
D. Sodium Answer: B. Calcium.
---
The other ions mentioned in the question do not have this specific
role in muscle contraction.
,Potassium ions are important for maintaining the resting membrane
potential of cells, but they do not bind to the troponin complex.
Phosphorus ions are important for energy metabolism, but they do
not bind to the troponin complex.
Sodium ions are important for generating action potentials, but they
do not bind to the troponin complex.
◉ Which of the following microorganisms lack their own metabolic
pathways and can only reproduce inside of a host cell?
A. Bacteria
B. Protozoa
C. Helminths
D. Viruses Answer: D. Viruses
◉ Which of the following is the atomic number of an atom that has
12 protons and 12 neutrons?
A. 24
B. 12
, C. 1
D. 144 Answer: B. 12
◉ Which of the following types of cells produce and release
antibodies?
A. Natural killer cells
B. Cytotoxic T-cells
C. Plasma B cells
D. Helper T-cells Answer: C. Plasma B cells
◉ Which of the following organic molecules contain both an amine
and carboxyl group?
A. Lipids
B. Chitin
C. Cellulose
D. Proteins Answer: D. Proteins
Proteins are made up of amino acids which are organic molecules
that contain both an amine functional group (-NH2) and a carboxylic
acid functional group (- COOH).
