NR 660 ATI TEAS SCIENCE DIAGNOSTIC TEST
COMPREHENSIVE PRACTICE QUESTIONS &
DETAILED ANSWERS (2026)
Which of these bonds would we see between nitrogenous bases?
- Ionic bonds
- Polar bonds
- Sulphone bonds
- Hydrogen bonds, - Hydrogen bonds
Between nitrogenous bases, hydrogen bonds are seen since this bond is
easy to break, which is needed during the processes of replication &
transcription.
Ionic bonds are seen between ions. Nitrogenous bases are not ions.
Nitrogenous bases do not form sulfide bonds.
Nitrogenous bases are not polar in nature & do not form polar bonds.
Which of the following is the most accurate description of the link between
chromosomes and DNA?
- The DNA sequence is made up of chromosomes, which include
numerous genes.
- Chromosomes include numerous genes, each of which is made up of a
DNA sequence.
- Chromosomes are the building blocks of DNA.
pg. 1
,- Genes contain chromosomes that are made up of DNA., - ANS -
Chromosomes include numerous genes, each of which is made up of a
DNA sequence.
Chromosomes carry genetic info in the form of DNA. Each gene is formed
of sequences of DNA & carries info for characteristics of organisms.
A chromosome is made up of DNA & protein, so chromosomes cannot be
considered the building blocks of DNA.
DNA is not formed by a sequence of chromosomes. Chromosomes are
made up of DNA.
Chromosomes contain genes. Genes do not contain chromosomes.
Which of the following statements about diffusion is true?
- Diffusion is the net mvt of mlc's or atoms from a region of higher
concentration to a region of lower concentration
- Gas exchange in tissues in not an example of diffusion
- Osmosis is not an example of diffusion
- Diffusion is the net mvt of mlc's or atoms from a region of lower
concentration to a region of higher concentration,- ANS - Diffusion is the
net mvt of mlc's or atoms from a region of higher concentration to a region
of lower concentration
Diffusion is the passive mvt (meaning that no additional nrg is needed to
facilitate the mvt) of particles (atoms, ions or mlc's) from a region in which
they are in higher concentration to regions of lower concentration. This
process continues until the concentration of substances is uniform
(equivalent) throughout.
pg. 2
,Gas exchange for respiration is an example of diffusion — O2 from blood to
tissue cells, CO2 in the opposite direction.
Osmosis is also an example of diffusion— diffusion of water thru a
semipermeable membrane.
Which of the following hormones is not increased in plasma during
dehydration?
- Antidiuretic hormone
- Aldosterone
- Renin
- Erythropoietin,- Erythropoietin
During dehydration, secretions of antidiuretic hormone, renin, &
aldosterone are increased in order to prevent further loss of water in the
urine.
Erythropoietin is produced in the kidney in response to low levels of oxygen
(hypoxia) in order to stimulate production of RBCs.
In which segment of the nephron is glucose reabsorbed?
- Collecting duct
- Proximal convoluted tubule
- Loop of henle
- Distal convoluted tubule,- Proximal convoluted tubule
Glucose, amino acids, & the majority of electrolytes & water are reabsorbed
in the proximal convoluted tubules via facilitated diffusion & active transport
pg. 3
, As air is inhaled, the sequence in which it passes through the respiratory
tract is best described by which of the following choices?
- Nasal cavity, trachea, pharynx, larynx, bronchioles, bronchi
- Nasal cavity, bronchi, bronchioles, trachea, pharynx, larynx
- Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles
- Pharynx, nasal cavity, larynx, trachea, bronchi, bronchioles,- Nasal cavity,
pharynx, larynx, trachea, bronchi, bronchioles
When inhaling, air is taken in thru the mouth & nose, & then thru the larynx
& pharynx. These passageways warm the air & prepare it for gas
exchange. The air continues on thru the trachea, commonly referred to as
the "windpipe". The trachea then splits into a right & left bronchi, w/ each
side dividing further into smaller bronchioles. While some bronchioles may
directly be involved in gas exchange, the majority of them are part of the
conducting airway, which simply moves air thru the respiratory system to
get them to the alveoli where most of the gas exchange occurs.
Which of the following is a hypothesis?
- When I added fertilizer to my plants, they grew more quickly.
- 5 different breeds of dogs are at the dog park.
- If a student gets more sleep, they will get a higher test score.
- 1 liter of water was added to a rxn.,- If a student gets more sleep, they
will get a higher test score.
A hypothesis is an explanation for observed phenomena. The other options
are merely observations from which hypotheses could be constructed.
pg. 4
COMPREHENSIVE PRACTICE QUESTIONS &
DETAILED ANSWERS (2026)
Which of these bonds would we see between nitrogenous bases?
- Ionic bonds
- Polar bonds
- Sulphone bonds
- Hydrogen bonds, - Hydrogen bonds
Between nitrogenous bases, hydrogen bonds are seen since this bond is
easy to break, which is needed during the processes of replication &
transcription.
Ionic bonds are seen between ions. Nitrogenous bases are not ions.
Nitrogenous bases do not form sulfide bonds.
Nitrogenous bases are not polar in nature & do not form polar bonds.
Which of the following is the most accurate description of the link between
chromosomes and DNA?
- The DNA sequence is made up of chromosomes, which include
numerous genes.
- Chromosomes include numerous genes, each of which is made up of a
DNA sequence.
- Chromosomes are the building blocks of DNA.
pg. 1
,- Genes contain chromosomes that are made up of DNA., - ANS -
Chromosomes include numerous genes, each of which is made up of a
DNA sequence.
Chromosomes carry genetic info in the form of DNA. Each gene is formed
of sequences of DNA & carries info for characteristics of organisms.
A chromosome is made up of DNA & protein, so chromosomes cannot be
considered the building blocks of DNA.
DNA is not formed by a sequence of chromosomes. Chromosomes are
made up of DNA.
Chromosomes contain genes. Genes do not contain chromosomes.
Which of the following statements about diffusion is true?
- Diffusion is the net mvt of mlc's or atoms from a region of higher
concentration to a region of lower concentration
- Gas exchange in tissues in not an example of diffusion
- Osmosis is not an example of diffusion
- Diffusion is the net mvt of mlc's or atoms from a region of lower
concentration to a region of higher concentration,- ANS - Diffusion is the
net mvt of mlc's or atoms from a region of higher concentration to a region
of lower concentration
Diffusion is the passive mvt (meaning that no additional nrg is needed to
facilitate the mvt) of particles (atoms, ions or mlc's) from a region in which
they are in higher concentration to regions of lower concentration. This
process continues until the concentration of substances is uniform
(equivalent) throughout.
pg. 2
,Gas exchange for respiration is an example of diffusion — O2 from blood to
tissue cells, CO2 in the opposite direction.
Osmosis is also an example of diffusion— diffusion of water thru a
semipermeable membrane.
Which of the following hormones is not increased in plasma during
dehydration?
- Antidiuretic hormone
- Aldosterone
- Renin
- Erythropoietin,- Erythropoietin
During dehydration, secretions of antidiuretic hormone, renin, &
aldosterone are increased in order to prevent further loss of water in the
urine.
Erythropoietin is produced in the kidney in response to low levels of oxygen
(hypoxia) in order to stimulate production of RBCs.
In which segment of the nephron is glucose reabsorbed?
- Collecting duct
- Proximal convoluted tubule
- Loop of henle
- Distal convoluted tubule,- Proximal convoluted tubule
Glucose, amino acids, & the majority of electrolytes & water are reabsorbed
in the proximal convoluted tubules via facilitated diffusion & active transport
pg. 3
, As air is inhaled, the sequence in which it passes through the respiratory
tract is best described by which of the following choices?
- Nasal cavity, trachea, pharynx, larynx, bronchioles, bronchi
- Nasal cavity, bronchi, bronchioles, trachea, pharynx, larynx
- Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles
- Pharynx, nasal cavity, larynx, trachea, bronchi, bronchioles,- Nasal cavity,
pharynx, larynx, trachea, bronchi, bronchioles
When inhaling, air is taken in thru the mouth & nose, & then thru the larynx
& pharynx. These passageways warm the air & prepare it for gas
exchange. The air continues on thru the trachea, commonly referred to as
the "windpipe". The trachea then splits into a right & left bronchi, w/ each
side dividing further into smaller bronchioles. While some bronchioles may
directly be involved in gas exchange, the majority of them are part of the
conducting airway, which simply moves air thru the respiratory system to
get them to the alveoli where most of the gas exchange occurs.
Which of the following is a hypothesis?
- When I added fertilizer to my plants, they grew more quickly.
- 5 different breeds of dogs are at the dog park.
- If a student gets more sleep, they will get a higher test score.
- 1 liter of water was added to a rxn.,- If a student gets more sleep, they
will get a higher test score.
A hypothesis is an explanation for observed phenomena. The other options
are merely observations from which hypotheses could be constructed.
pg. 4
