teas 7 science exam
The following diagram summarizes the carbonic acid-bicarbonate ion
buffer system of
the
blood.
CO2 + H20 < > H2CO3 < > HCO3-
+ H+
Which of the following equations show the reaction that takes place
when thereprotons
excessive are (H+) in the
blood?
A. H2CO3 --> CO2 +
H20
B. CO2 + H20 -->
H2CO3
C. HCO3- + H+ -->
H2CO3
D. H2CO3 --> HCO3- + H+ correct answers C. HCO3- + H+ -->
H2CO3
The following diagram summarizes the carbonic acid-bicarbonate ion
buffer system of
the
blood.
CO2 + H20 < > H2CO3 < > HCO3-
+ H+
Which of the following equations show the reaction that takes place when
thereprotons
little are very(H+) in the
blood?
A. H2CO3 --> CO2 +
H20
B. CO2 + H20 -->
H2CO3
C. HCO3- + H+ -->
H2CO3
D. H2CO3 --> HCO3- + H+ correct answers D. H2CO3 -->
HCO3- + H+
which of the following describes the process by which solid carbon
dioxide
turns (dry ice)
directly into carbon dioxide
A.
gas?
Evaporation
B.
Sublimation
C.
Deposition
D. Condensation correct answers B.
Sublimation
which of the following describes why water has a
concave, or
downward-curving, meniscus when poured in a glass
beaker?
A. The adhesive forces with the glass are greater than the
cohesive
B. forces.
Glass has a higher density than
water.
C. Water has a higher density than
glass.
D. A. The cohesive forces with the glass are greater than the adhesive
forces. correct
answers A. The adhesive forces with the glass are greater than the
cohesive meniscus
concave forces. is when molecules are attracted more to the
container then
themselves = adhesive forces = downward
curving
concave meniscus is when molecules are attracted more to each
other then=the
container cohesive forces = upward
curving
,Which of the following actions does a hydrophilic hormone take to activate a
target
A. The cell?
hormone binds to cell-surface receptors of the
target
B. The cell.
hormone passes through the plasma membrane of a
target
C. The cell.
hormone binds to a cytosolic receptor in the
target
D. The cell.
hormone enters a target cell through a transport protein. correct
hormone
answers A. binds
The to cell-surface receptors of the
target cell. = water loving hormones can just bind to the receptors on the
hydrophilic
outside
cell whichof that
the binding can change the permeability of the cell making it
more open
activate thistotarget cell (usually its a second messenger system). This is
action
the is when system sends hormones to
endocrine
target cells.
Which of the following best describes adaptive
immunity?
A. The initiation of internal defenses, such as phagocytes and natural
killer
B. Thecells.
body's barrier defenses, such as mucous membranes and
secretions.
C. A response to specific traits of specific
pathogens
D. The initation of the inflammatory response. correct answers C. A
responsetraits
specific to of specific
pathogens
adaptive immunity = specific and
targeted
immune immunity = nonspecific and
general
(the other three are innate
immunity)
Permanent damage to which of the following types of tissues in the
spinal cord will
cause
paralysis?
A. Bone
tissue
B. Nervous
tissue
C. Muscle
tissue
D. Connective tissue correct answers B. Nervous
tissue
nervous system is all about messages so if you cant send messages you
cant move
your muscles since they need the command from the
nervous system
Which of the following describes the function of
tendons?
A. Tendons attach two
bones.
B. Tendons attach bones to
ligaments.
C. Tendons attach skeletal muscles to
ligaments.
D. Tendons attach skeletal muscles to bones. correct answers D.
Tendons muscles
skeletal attach to
bones.
ligaments is bone to
bone
Which of the following is used to indicate
mass?
A.
mg
B. μm
C.
cm^3
D. mL correct answers A.
mg
μm =
length
cm^3 =
volume
,mL =
volume
Histones are proteins associated with which of the
following?
A. Sperm
cells
B.
Blood
C.
DNA
D. Hair follicles correct answers C.
DNA
condenses the DNA into
chromatin
The shortening of a sacromere in skeletal muscle is directly due to the
interaction
which of theof
following?
A. Acetylcholine and
acetylcholinesterase
B. Dynein and
Kinesine
C. Pepsin and
pepsinogen
D. Myosin and Actin correct answers D. Myosin
and Actin
Which of the following bases is found in RNA but is absent
from DNA?
A.
Adenine
B.
Uracil
C.
D. Thymine correct answers B.
Cytosine
Uracil
Which of the following occurs during
inhalation?
A. The volume of the thoracic cavity
decreases.
B. Air moves from areas of low pressure to areas of high
pressure.
C. The ribcage
lowers.
D. The diaphragm moves downward. correct answers D. The
diaphragm
downwar moves
d.
at the same time the ribs move upward and when the thoracic cavity
volume
then increases
pressure decreases so air moves from high
to low
When an ionic salt dissolves in water, the ions CO3^2- and K^+ are
formed.
the Which
following is of
the formula for the
A.
salt?
K3CO2
B. KCO3
C.
D. K2CO3 correct answers D.
K(CO3)2
K2CO3
CO3 HAS A NEGATIVE 2 CHARGE = meaning two more electrons then
protons
K^+ HAS A POSTIVE 1 CHARGE = meaning it has one more proton then
electrons
is missingandone
electron
to make this a neutral salt you need two K ions for every one carbonate
ion (CO3)
K2CO3 +H2O = K+(aq) +
CO3^2-(aq)
, A mutation of a portion of a DNA molecule changed the resulting mRNA
sequence from to CUU-GGG-UUC. Using the table, predict the resulting
AUU-GGG-UUC
amino acid
sequenc
e.
A. From Met-Gly-Leu to Leu-Gly-
Phe
B. From Leu-Gly-Phe to Met-Gly-
Leu
C. From lle-Gly-Ser to Leu-Gly-
Phe
D. From lle-Gly-Phe to Leu-Gly-Phe correct answers D. From lle-Gly-Phe to
Leu-Gly-
Phe
Which of the following statements correctly describes the change in coat
coloring
Arctic foxoffrom
an brown in summer to white in
winter?
A. The fox's phenotype changes, but the genotype
does
B. not. the phenotype nor the genotype of the fox
Neither
changes.
C. The fox's genotype changes, but the phenotype
does
D. Bothnot.the phenotype and genotype of the fox changes. correct answers
A. The fox'schanges, but the genotype
phenotype
does not. can never change you either have it
Genotypes
or dont
but phenotypic plasticity means that a genotype can make different
variations ofdepending on the environmental
phenotypes
conditions
Which of the following structures is a flap of cartilage that prevents the
movement
food into the of
trachea?
A.
Glottis
B.
Pharynx
C.
Epiglottis
D. Larynx correct answers C.
Epiglottis
If a portion of a strand of DNA bases read 5' AGCTAGCGT 3', what would the
sequence
of bases on the complementary strand
read?
A. 5' TCGUTCGCU
B. 5' UCGAUCGCA '
3'
3 3' AGCTAGCGT
C.
5'
D. 3' TCGATCGCA 5' correct answers D. 3'
TCGATCGCA 5' is DNA to DNA (so A=T , T=A, C=G, G=C) also its 3' to 5'
complementary
for a 5' to 3'
prime
DNA
if its DNA to RNA then replace any A with U as the complementary RNA also
its 3'
for to to
a 5' 5' 3' prime
DNA
How many times larger is the volume of a cube that is 4 mm on all sides
compared
the volumetoof a cube that is 2 mm on all sides (Round the answer to the
nearest whole
number) correct answers volume of a cube is side times side times side
ortimes
4 side^3 4 times 4 or 4^3 = 64
mm^3
2 times 2 times 2 or 2^3 = 8
mm^3
64/8 = 8 so the volume of a 4mm cube is 8 times larger then the volume of
a 2mm cube
The following diagram summarizes the carbonic acid-bicarbonate ion
buffer system of
the
blood.
CO2 + H20 < > H2CO3 < > HCO3-
+ H+
Which of the following equations show the reaction that takes place
when thereprotons
excessive are (H+) in the
blood?
A. H2CO3 --> CO2 +
H20
B. CO2 + H20 -->
H2CO3
C. HCO3- + H+ -->
H2CO3
D. H2CO3 --> HCO3- + H+ correct answers C. HCO3- + H+ -->
H2CO3
The following diagram summarizes the carbonic acid-bicarbonate ion
buffer system of
the
blood.
CO2 + H20 < > H2CO3 < > HCO3-
+ H+
Which of the following equations show the reaction that takes place when
thereprotons
little are very(H+) in the
blood?
A. H2CO3 --> CO2 +
H20
B. CO2 + H20 -->
H2CO3
C. HCO3- + H+ -->
H2CO3
D. H2CO3 --> HCO3- + H+ correct answers D. H2CO3 -->
HCO3- + H+
which of the following describes the process by which solid carbon
dioxide
turns (dry ice)
directly into carbon dioxide
A.
gas?
Evaporation
B.
Sublimation
C.
Deposition
D. Condensation correct answers B.
Sublimation
which of the following describes why water has a
concave, or
downward-curving, meniscus when poured in a glass
beaker?
A. The adhesive forces with the glass are greater than the
cohesive
B. forces.
Glass has a higher density than
water.
C. Water has a higher density than
glass.
D. A. The cohesive forces with the glass are greater than the adhesive
forces. correct
answers A. The adhesive forces with the glass are greater than the
cohesive meniscus
concave forces. is when molecules are attracted more to the
container then
themselves = adhesive forces = downward
curving
concave meniscus is when molecules are attracted more to each
other then=the
container cohesive forces = upward
curving
,Which of the following actions does a hydrophilic hormone take to activate a
target
A. The cell?
hormone binds to cell-surface receptors of the
target
B. The cell.
hormone passes through the plasma membrane of a
target
C. The cell.
hormone binds to a cytosolic receptor in the
target
D. The cell.
hormone enters a target cell through a transport protein. correct
hormone
answers A. binds
The to cell-surface receptors of the
target cell. = water loving hormones can just bind to the receptors on the
hydrophilic
outside
cell whichof that
the binding can change the permeability of the cell making it
more open
activate thistotarget cell (usually its a second messenger system). This is
action
the is when system sends hormones to
endocrine
target cells.
Which of the following best describes adaptive
immunity?
A. The initiation of internal defenses, such as phagocytes and natural
killer
B. Thecells.
body's barrier defenses, such as mucous membranes and
secretions.
C. A response to specific traits of specific
pathogens
D. The initation of the inflammatory response. correct answers C. A
responsetraits
specific to of specific
pathogens
adaptive immunity = specific and
targeted
immune immunity = nonspecific and
general
(the other three are innate
immunity)
Permanent damage to which of the following types of tissues in the
spinal cord will
cause
paralysis?
A. Bone
tissue
B. Nervous
tissue
C. Muscle
tissue
D. Connective tissue correct answers B. Nervous
tissue
nervous system is all about messages so if you cant send messages you
cant move
your muscles since they need the command from the
nervous system
Which of the following describes the function of
tendons?
A. Tendons attach two
bones.
B. Tendons attach bones to
ligaments.
C. Tendons attach skeletal muscles to
ligaments.
D. Tendons attach skeletal muscles to bones. correct answers D.
Tendons muscles
skeletal attach to
bones.
ligaments is bone to
bone
Which of the following is used to indicate
mass?
A.
mg
B. μm
C.
cm^3
D. mL correct answers A.
mg
μm =
length
cm^3 =
volume
,mL =
volume
Histones are proteins associated with which of the
following?
A. Sperm
cells
B.
Blood
C.
DNA
D. Hair follicles correct answers C.
DNA
condenses the DNA into
chromatin
The shortening of a sacromere in skeletal muscle is directly due to the
interaction
which of theof
following?
A. Acetylcholine and
acetylcholinesterase
B. Dynein and
Kinesine
C. Pepsin and
pepsinogen
D. Myosin and Actin correct answers D. Myosin
and Actin
Which of the following bases is found in RNA but is absent
from DNA?
A.
Adenine
B.
Uracil
C.
D. Thymine correct answers B.
Cytosine
Uracil
Which of the following occurs during
inhalation?
A. The volume of the thoracic cavity
decreases.
B. Air moves from areas of low pressure to areas of high
pressure.
C. The ribcage
lowers.
D. The diaphragm moves downward. correct answers D. The
diaphragm
downwar moves
d.
at the same time the ribs move upward and when the thoracic cavity
volume
then increases
pressure decreases so air moves from high
to low
When an ionic salt dissolves in water, the ions CO3^2- and K^+ are
formed.
the Which
following is of
the formula for the
A.
salt?
K3CO2
B. KCO3
C.
D. K2CO3 correct answers D.
K(CO3)2
K2CO3
CO3 HAS A NEGATIVE 2 CHARGE = meaning two more electrons then
protons
K^+ HAS A POSTIVE 1 CHARGE = meaning it has one more proton then
electrons
is missingandone
electron
to make this a neutral salt you need two K ions for every one carbonate
ion (CO3)
K2CO3 +H2O = K+(aq) +
CO3^2-(aq)
, A mutation of a portion of a DNA molecule changed the resulting mRNA
sequence from to CUU-GGG-UUC. Using the table, predict the resulting
AUU-GGG-UUC
amino acid
sequenc
e.
A. From Met-Gly-Leu to Leu-Gly-
Phe
B. From Leu-Gly-Phe to Met-Gly-
Leu
C. From lle-Gly-Ser to Leu-Gly-
Phe
D. From lle-Gly-Phe to Leu-Gly-Phe correct answers D. From lle-Gly-Phe to
Leu-Gly-
Phe
Which of the following statements correctly describes the change in coat
coloring
Arctic foxoffrom
an brown in summer to white in
winter?
A. The fox's phenotype changes, but the genotype
does
B. not. the phenotype nor the genotype of the fox
Neither
changes.
C. The fox's genotype changes, but the phenotype
does
D. Bothnot.the phenotype and genotype of the fox changes. correct answers
A. The fox'schanges, but the genotype
phenotype
does not. can never change you either have it
Genotypes
or dont
but phenotypic plasticity means that a genotype can make different
variations ofdepending on the environmental
phenotypes
conditions
Which of the following structures is a flap of cartilage that prevents the
movement
food into the of
trachea?
A.
Glottis
B.
Pharynx
C.
Epiglottis
D. Larynx correct answers C.
Epiglottis
If a portion of a strand of DNA bases read 5' AGCTAGCGT 3', what would the
sequence
of bases on the complementary strand
read?
A. 5' TCGUTCGCU
B. 5' UCGAUCGCA '
3'
3 3' AGCTAGCGT
C.
5'
D. 3' TCGATCGCA 5' correct answers D. 3'
TCGATCGCA 5' is DNA to DNA (so A=T , T=A, C=G, G=C) also its 3' to 5'
complementary
for a 5' to 3'
prime
DNA
if its DNA to RNA then replace any A with U as the complementary RNA also
its 3'
for to to
a 5' 5' 3' prime
DNA
How many times larger is the volume of a cube that is 4 mm on all sides
compared
the volumetoof a cube that is 2 mm on all sides (Round the answer to the
nearest whole
number) correct answers volume of a cube is side times side times side
ortimes
4 side^3 4 times 4 or 4^3 = 64
mm^3
2 times 2 times 2 or 2^3 = 8
mm^3
64/8 = 8 so the volume of a 4mm cube is 8 times larger then the volume of
a 2mm cube
