TEAS practice test (science portion) Questions With
Complete Solutions
___ are at a higher taxonomic level of organization than ___
a) organs, organ system
b) cells, molecules
c) atoms, molecules
d) tissues, organs Correct Answer Cells; molecules
2 or more tissue types work together to perform a specific
function at what level? Correct Answer The organ level
2 reasons for conducting scientific investigations Correct
Answer Establishing procedures. Involving quality of life.
235 U --> X + 4 He 92 2
Which of the following is "x" in the reaction above?
a) 239 Pu 94
b) 231 Pu 94
c) 231 Th 90
d) 239 Th 90 Correct Answer 231 Th 90
Look for numbers that correctly ad up to the number on the
opposite side of the reaction
231+4 = 235
90+2 = 92
In natural decay of radioisotope uranium 235, uranium loses 2
protons and 4 mass units, the atomic number is reduced by 2 and
the mass number is reduced by 4. corresponding to thorium 231
4 He + 14 N--> 17 O + X
,Which of the following options for "x" in the nuclear reaction
above?
a) 1H 1
b) 18 F 9
c) 3H 1
d) 1 N 0 Correct Answer 1 H 1
Explanation: 1 + 7 = 8
4 + 14 = 16, 16 + 1 = 17
The proton and neutron complement is equal, required by law of
conservation of mass and charge
A cell uses which of the following as the first-line of defense
against mutations during DNA replication?
a) cell death
b) excision repair
c) mismatch repair
d) DNA polymerase proofreading Correct Answer DNA
polymerase proofreading
A certain disease is carried on the allele (a) which is recessive to
the normal condition (A). If a normal (AA) male meet with a
female who has the disease (aa), what is the percentage of
offspring that are carriers of the disease?
a) 0%
b) 25%
c) 75%
d) 100% Correct Answer 100%
A chemical bonding of atoms that possesses its own
characteristics independent of the atoms themselves Correct
Answer Molecule
,A drug that stops the function of genetic code from DNA
polymerase would:
a) slow the transcription of genetic code from DNA to
messenger RNA
b) hinder the rate of binding of transfer RNA anticodons to
messenger RNA codons
c) prevent formation of peptide bonds between the amino acids
of the growing protein molecule
d) block the replication of DNA carrying the genetic code in the
nucleus Correct Answer block the replication of DNA carrying
the genetic code in nucleus
DNA polymerase in the enzyme that copies DNA
A harmful example of a catalytic reaction involves the
breakdown of ozone by use of_______
a) chlorine ions
b) fluorine ions
c) manganese dioxide
d) rhodium Correct Answer Chlorine ions
A large saturated hydrocarbon will contain ___
a) the same number of hydrocarbon
b) exactly twice as many hydrogen atoms as carbon atoms
c) less than twice as many hydrogen atoms as carbon atoms
d) more than twice as many hydrogen atoms as carbon atoms
Correct Answer More than twice as many hydrogen atoms as
carbon atoms
, A new organism has been recently discovered in the ocean. All
that is known of the organism's cell structure is that it lacks a
membrane bound nucleus. Which of the following indicates how
this organism will be classified in terms of cell type ?
a) plant
b) animal
c) Prokaryote
d) Fungus Correct Answer Prokaryote
A proton should have what two characteristics when compared
to the charge and the mass of an electron?
a) the same charge and the same mass
b) the same charge and larger mass
c) an opposite charge and same mass
d) an opposite charge and larger mass Correct Answer An
opposite charge and a larger mass
A research student is determining the pollen count for a 24-hour
period in a given location. The students data would be most
reliable if he decided to count the pollen in what?
a) a single decimeter square for one morning and one afternoon
b) multiple decimeter squares for one morning and one
afternoon
c) a single decimeter square for one afternoon
d) multiple decimeter squares for one afternoon Correct Answer
Multiple decimeter squares for one morning and one afternoon
A research student predicts that rats raised in a stimulating
environment will learn faster than rats raised in an isolated
environment. This prediction corresponds with which of the
following steps in the scientific method?
Complete Solutions
___ are at a higher taxonomic level of organization than ___
a) organs, organ system
b) cells, molecules
c) atoms, molecules
d) tissues, organs Correct Answer Cells; molecules
2 or more tissue types work together to perform a specific
function at what level? Correct Answer The organ level
2 reasons for conducting scientific investigations Correct
Answer Establishing procedures. Involving quality of life.
235 U --> X + 4 He 92 2
Which of the following is "x" in the reaction above?
a) 239 Pu 94
b) 231 Pu 94
c) 231 Th 90
d) 239 Th 90 Correct Answer 231 Th 90
Look for numbers that correctly ad up to the number on the
opposite side of the reaction
231+4 = 235
90+2 = 92
In natural decay of radioisotope uranium 235, uranium loses 2
protons and 4 mass units, the atomic number is reduced by 2 and
the mass number is reduced by 4. corresponding to thorium 231
4 He + 14 N--> 17 O + X
,Which of the following options for "x" in the nuclear reaction
above?
a) 1H 1
b) 18 F 9
c) 3H 1
d) 1 N 0 Correct Answer 1 H 1
Explanation: 1 + 7 = 8
4 + 14 = 16, 16 + 1 = 17
The proton and neutron complement is equal, required by law of
conservation of mass and charge
A cell uses which of the following as the first-line of defense
against mutations during DNA replication?
a) cell death
b) excision repair
c) mismatch repair
d) DNA polymerase proofreading Correct Answer DNA
polymerase proofreading
A certain disease is carried on the allele (a) which is recessive to
the normal condition (A). If a normal (AA) male meet with a
female who has the disease (aa), what is the percentage of
offspring that are carriers of the disease?
a) 0%
b) 25%
c) 75%
d) 100% Correct Answer 100%
A chemical bonding of atoms that possesses its own
characteristics independent of the atoms themselves Correct
Answer Molecule
,A drug that stops the function of genetic code from DNA
polymerase would:
a) slow the transcription of genetic code from DNA to
messenger RNA
b) hinder the rate of binding of transfer RNA anticodons to
messenger RNA codons
c) prevent formation of peptide bonds between the amino acids
of the growing protein molecule
d) block the replication of DNA carrying the genetic code in the
nucleus Correct Answer block the replication of DNA carrying
the genetic code in nucleus
DNA polymerase in the enzyme that copies DNA
A harmful example of a catalytic reaction involves the
breakdown of ozone by use of_______
a) chlorine ions
b) fluorine ions
c) manganese dioxide
d) rhodium Correct Answer Chlorine ions
A large saturated hydrocarbon will contain ___
a) the same number of hydrocarbon
b) exactly twice as many hydrogen atoms as carbon atoms
c) less than twice as many hydrogen atoms as carbon atoms
d) more than twice as many hydrogen atoms as carbon atoms
Correct Answer More than twice as many hydrogen atoms as
carbon atoms
, A new organism has been recently discovered in the ocean. All
that is known of the organism's cell structure is that it lacks a
membrane bound nucleus. Which of the following indicates how
this organism will be classified in terms of cell type ?
a) plant
b) animal
c) Prokaryote
d) Fungus Correct Answer Prokaryote
A proton should have what two characteristics when compared
to the charge and the mass of an electron?
a) the same charge and the same mass
b) the same charge and larger mass
c) an opposite charge and same mass
d) an opposite charge and larger mass Correct Answer An
opposite charge and a larger mass
A research student is determining the pollen count for a 24-hour
period in a given location. The students data would be most
reliable if he decided to count the pollen in what?
a) a single decimeter square for one morning and one afternoon
b) multiple decimeter squares for one morning and one
afternoon
c) a single decimeter square for one afternoon
d) multiple decimeter squares for one afternoon Correct Answer
Multiple decimeter squares for one morning and one afternoon
A research student predicts that rats raised in a stimulating
environment will learn faster than rats raised in an isolated
environment. This prediction corresponds with which of the
following steps in the scientific method?
