ATI TEAS VII ONLINE PRACTICE A –
SCIENCE MASTERY GUIDE – PASS THE
TEAS SCIENCE SECTION WITH
CONFIDENCE
Methionine synthase
Methionine synthase has the suffix -ase, which is a standard nomenclature for
enzymes. Its name further indicates that it helps to make methionine, so it is a catalyst. -
correct answers ✔✔Vitamin B12 is converted to methyl-cobalamin, which is consumed
in a reaction where methionine synthase produces the amino acid methionine. Which of
the following molecules is the catalyst in this reaction?
Vitamin B12
Methyl-cobalamin
Methionine synthase
, Methionine
Steroids
Steroids are lipid-soluble. Therefore, they are able to diffuse across the hydrophobic cell
membrane. - correct answers ✔✔Which of the following classes of chemical
messengers is able to easily diffuse across the cell membrane?
Steroids
Interleukins
Catecholamines
Histamines
Transcription
Transcription is the process by which a gene, encoded in DNA, is copied into a
messenger RNA. RNA contains ribose sugar and uracil base. - correct answers ✔✔A
gene is being copied into a molecule that contains ribose and uracil. Which of the
following cellular processes does this describe?
DNA replication
Translation
Gene splicing
Transcription
The lymph flows from the interstitial spaces toward the heart is correct.
^
The lymphatic system contains a clear fluid called lymph that flows in one direction from
the interstitial spaces toward the lymph ducts that then empty into the veins to enter the
circulatory system and travel toward the heart.
The lymphatic system helps the body to absorb lipids is correct.
^
Lymphatic vessels, called lacteals, absorb dietary lipids from the small intestine. -
correct answers ✔✔Which of the following statements are true regarding the lymphatic
system?
It is a closed circulatory system.
The lymph flows from the interstitial spaces toward the heart.
The lymph transports carbon dioxide to the lungs for expiration.
The lymphatic systems helps the body to absorb lipids.
The lymphatic system contains more red blood cells than white blood cells.
The skin will not have pigmentation.
SCIENCE MASTERY GUIDE – PASS THE
TEAS SCIENCE SECTION WITH
CONFIDENCE
Methionine synthase
Methionine synthase has the suffix -ase, which is a standard nomenclature for
enzymes. Its name further indicates that it helps to make methionine, so it is a catalyst. -
correct answers ✔✔Vitamin B12 is converted to methyl-cobalamin, which is consumed
in a reaction where methionine synthase produces the amino acid methionine. Which of
the following molecules is the catalyst in this reaction?
Vitamin B12
Methyl-cobalamin
Methionine synthase
, Methionine
Steroids
Steroids are lipid-soluble. Therefore, they are able to diffuse across the hydrophobic cell
membrane. - correct answers ✔✔Which of the following classes of chemical
messengers is able to easily diffuse across the cell membrane?
Steroids
Interleukins
Catecholamines
Histamines
Transcription
Transcription is the process by which a gene, encoded in DNA, is copied into a
messenger RNA. RNA contains ribose sugar and uracil base. - correct answers ✔✔A
gene is being copied into a molecule that contains ribose and uracil. Which of the
following cellular processes does this describe?
DNA replication
Translation
Gene splicing
Transcription
The lymph flows from the interstitial spaces toward the heart is correct.
^
The lymphatic system contains a clear fluid called lymph that flows in one direction from
the interstitial spaces toward the lymph ducts that then empty into the veins to enter the
circulatory system and travel toward the heart.
The lymphatic system helps the body to absorb lipids is correct.
^
Lymphatic vessels, called lacteals, absorb dietary lipids from the small intestine. -
correct answers ✔✔Which of the following statements are true regarding the lymphatic
system?
It is a closed circulatory system.
The lymph flows from the interstitial spaces toward the heart.
The lymph transports carbon dioxide to the lungs for expiration.
The lymphatic systems helps the body to absorb lipids.
The lymphatic system contains more red blood cells than white blood cells.
The skin will not have pigmentation.
