7666059
Descripción
Test por Alexandra Bozan, actualizado hace más de 1 año
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Creado por Alexandra Bozan
hace casi 8 años
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Pregunta 1
Pregunta
The major function of ribosomes is to synthesize
Respuesta
-
proteins
-
carbohydrates
-
fats
-
cholesterol
Pregunta 2
Pregunta
Diffusion of water through a selectively permeable membrane in the presence of at least one impermeant solute is referred to as
Respuesta
-
diffusion
-
osmosis
-
phagocytosis
-
pinocytosis
Pregunta 3
Pregunta
Main cell structures include all of the following except
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organelles
-
plasma membrane
-
blood plasma
-
cytoplasm
Pregunta 4
Pregunta
The physical process by which water and solute move through a membrane when a hydrostatic pressure gradient exists across the membrane is the process of
Respuesta
-
dialysis
-
osmosis
-
diffusion
-
filtration
Pregunta 5
Pregunta
If a 20% glucose solution is separated from a 10% glucose solution by a permeable membrane
Respuesta
-
glucose would move from the 20% solution to the 10% solution
-
water would move from the 10% solution to the 20% solution
-
water would move from the 20% solution to the 10% solution
Pregunta 6
Pregunta
Chromosomes and chromatin are both forms of DNA
Respuesta
- True
- False
Pregunta 7
Pregunta
Transcription can be best described as the
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-
degradation of tRNA
-
reading of mRNA codons by tRNA
-
replication of DNA
-
synthesis of mRNA
Pregunta 8
Pregunta
The major direct cell connections are tight junctions, gap junctions, and desmosomes
Respuesta
- True
- False
Pregunta 9
Pregunta
Rough endoplasmic reticulum looks rough because there are mitochondria attached to it
Respuesta
- True
- False
Pregunta 10
Pregunta
Preparation of protein molecules for cellular exportation is the function of which of the following organelles?
Respuesta
-
Golgi apparatus
-
smooth endoplasmic reticulum
-
rough endoplasmic reticulum
-
mitochondria
Pregunta 11
Pregunta
The structure that separates the contents of a cell from the surrounding tissue is known as
Respuesta
-
Golgi apparatus
-
plasma membrane
-
cytoplasm
-
centrosome
Pregunta 12
Pregunta
The number of mitochondria in a cell is basically related to its degree of activity
Respuesta
- True
- False
Pregunta 13
Pregunta
Which of the following is a functional characteristic of ribosomes?
Respuesta
-
manufacture of mRNA
-
protein synthesis
-
DNA replication
-
housing of DNA
Pregunta 14
Pregunta
An individual’s entire set of DNA can be referred to as:
Respuesta
-
chromatid
-
genome
-
cytokinesis
Pregunta 15
Pregunta
Which of the following is not true of RNA?
Respuesta
-
It is a single strand
-
It contains uracil rather than thymine
-
The obligatory base pairs are adenine and uracil, and guanine and cytosine
-
It contains deoxyribose sugar
Pregunta 16
Pregunta
A saline solution that contains a higher concentration of salt than a living red blood cell would be
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isotonic
-
hypotonic
-
hypertonic
Pregunta 17
Pregunta
A DNA molecule is characterized by all of the following except
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-
double helix shape
-
obligatory base pairing
-
ribose sugar
-
phosphate groups
Pregunta 18
Pregunta
A 10% solution of NaCl has a higher concentration of water than a 10% solution of glucose
Respuesta
- True
- False
Pregunta 19
Pregunta
Homeostasis can best be described as:
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-
a constant state maintained by living and nonliving organisms
-
a state of relative constancy
-
adaptation to external environment
-
changes in body temperature
Pregunta 20
Pregunta
Phagocytosis is an example of
Respuesta
-
exocytosis
-
endocytosis
-
passive transport
-
facilitated diffusion
Pregunta 21
Pregunta
A frontal section divides the body into
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-
upper and lower portions
-
right and left portions
-
front and back portions
Pregunta 22
Pregunta
Positive feedback control systems
Respuesta
-
have no effect on the deviation from set point
-
accelerate a change
-
ignore a change
Pregunta 23
Pregunta
The functions of the nucleus are actually regulated by RNA
Respuesta
- True
- False
Pregunta 24
Pregunta
Granules or threads within the nucleus are called
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-
microfilaments
-
chromatin
-
nucleotides
-
microtubules
Pregunta 25
Pregunta
A sequence of three bases forms a(n)
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codon
-
anticodon
-
amino acid
-
polypeptide bond
Pregunta 26
Pregunta
With reference to the left elbow, the left shoulder would be the contralateral shoulder.
Respuesta
- True
- False
Pregunta 27
Pregunta
The anticodon on the tRNA molecule is exactly the same nucleotide sequence as the DNA code that formed that part of the mRNA molecule except that uracil would replace thymine.
Respuesta
- True
- False
Pregunta 28
Pregunta
The G1 and G2 phases of cell growth are separated by:
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-
anaphase
-
the S phase
-
telophase
-
anaphase and telophase.
Pregunta 29
Pregunta
The pairing of bases of a strand of DNA is obligatory. If a strand of DNA were composed of the base sequence of ATCG, what would be the obligated sequence of its opposing base pairs?
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-
TAGC
-
CGAT
-
GCTA
-
ATCG
Pregunta 30
Pregunta
Ribosomes attached to the endoplasmic reticulum are responsible for making proteins for export out of the cell.
Respuesta
- True
- False
Pregunta 31
Pregunta
Proximal and distal are opposite directional terms in humans.
Respuesta
- True
- False
Pregunta 32
Pregunta
In the cell membrane, the hydrophilic part of the phospholipid molecule:
Respuesta
-
A. faces the exterior of the cell
-
B. faces the interior of the cell
-
C. is in the center of the phospholipid bilayer.
-
D. A and B.
Pregunta 33
Pregunta
When the chromosomes align themselves across the equator of the spindle fibers, it is characteristic of which phase of mitosis?
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prophase
-
anaphase
-
metaphase
-
telophase
Pregunta 34
Pregunta
Projections from the cell that move materials and mucus are:
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-
cilia
-
flagella
-
microvilli
-
microtubules
Pregunta 35
Pregunta
A plane through the body that would divide the body into anterior and posterior portions is:
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-
sagittal
-
median
-
coronal
-
transverse
Pregunta 36
Pregunta
A hypertonic solution contains:
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-
a greater concentration of solute than the cell.
-
the same concentration of solute as the cell.
-
a lesser concentration of solute than the cell.
-
none of the above.
Pregunta 37
Pregunta
Each of the following is an example of the plasma membrane function except:
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-
boundary
-
self-identification
-
receptor sites
-
production of proteins
Pregunta 38
Pregunta
A nucleotide of a DNA molecule consists of a ribose sugar, phosphoric acid, and a nitrogenous base.
Respuesta
- True
- False
Pregunta 39
Pregunta
The abdominopelvic cavity contains all of the following except the:
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-
kidneys
-
gallbladder
-
right lung
-
urinary bladder
Pregunta 40
Pregunta
An organ is one organizational step lower than a(n):
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-
system
-
cell
-
organelle.
-
tissue
Pregunta 41
Pregunta
Dialysis is a form of filtration that results in a separation of small and large solute particles.
Respuesta
- True
- False
Pregunta 42
Pregunta
ATP production occurs within which organelle?
Respuesta
-
rough endoplasmic reticulum
-
Golgi apparatus
-
flagellum
-
mitochondrion
Pregunta 43
Pregunta
Genes determine polypeptide structure, which determines the structure of enzymes and structural proteins, which determine the cell’s functions and structure.
Respuesta
- True
- False
Pregunta 44
Pregunta
Shivering to try to raise your body temperature back to normal would be an example of:
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A. the body trying to maintain homeostasis
-
B. a positive feedback mechanism
-
C. a negative feedback mechanism
-
D. A and C
Pregunta 45
Pregunta
Which of the following statements is true?
Respuesta
-
Amino acid chains form DNA.
-
The site of transcription is within the nucleus, while the site of translation is in the cytoplasm.
-
Uracil is present in DNA in place of thymine.
-
None of the above.
Pregunta 46
Pregunta
The structure in white blood cells associated with the enzymatic breakdown of foreign material is the:
Respuesta
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lysosome
-
Golgi apparatus
-
ribosome
-
centriole
Pregunta 47
Pregunta
In anatomical position, the person is standing erect with arms at the sides and palms dorsal.
Respuesta
- True
- False
Pregunta 48
Pregunta
Visceral peritoneum would cover which of the following organs?
Respuesta
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heart
-
intestines
-
lungs
-
spinal cord
Pregunta 49
Pregunta
The action of a gene is determined by the arrangement of the obligatory base pairs in the nucleotides composing a DNA molecule.
Respuesta
- True
- False
Pregunta 50
Pregunta
Ventral and posterior are synonymous terms
Respuesta
- True
- False
Pregunta 51
Pregunta
Which organelle processes and packages material to be secreted?
Respuesta
-
nucleolus
-
ribosome
-
mitochondrion
-
Golgi apparatus
Pregunta 52
Pregunta
The head, neck, arms, and legs make up the axial skeleton.
Respuesta
- True
- False
Pregunta 53
Pregunta
Which of the following is not a function of the plasma membrane?
Respuesta
-
self-identification
-
receptor site for messages
-
selective barrier
-
control center of the cell
Pregunta 54
Pregunta
Two major cavities of the human body are:
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ventral/dorsal
-
inferior/superior
-
visceral/parietal
-
axial/appendicular
Pregunta 55
Pregunta
The bone of the upper arm is deep to the muscles that surround and cover it.
Respuesta
- True
- False
Pregunta 56
Pregunta
The basic unit of structure and function in the human body is a(n):
Respuesta
-
atom
-
cell
-
gene
-
DNA molecule.
Pregunta 57
Pregunta
The correct arrangement of the phases of mitosis is:
Respuesta
-
anaphase, telophase, metaphase, prophase
-
prophase, metaphase, anaphase, telophase
-
prophase, anaphase, metaphase, telophase
-
anaphase, metaphase, prophase, telophase.
-
none of the above.
Pregunta 58
Pregunta
When many similar cells specialize to perform a certain function, it is referred to as:
Respuesta
-
tissue
-
organelle
-
organ system complex
-
organism
Pregunta 59
Pregunta
In certain situations, cells “commit suicide.” This function would be carried out by the lysosomes.
Respuesta
- True
- False
Pregunta 60
Pregunta
In normal mitosis, the two daughter cells are identical genetically to the parent cell.
Respuesta
- True
- False
Pregunta 61
Pregunta
The organelles that can digest and destroy microbes that invade the cell are:
Respuesta
-
peroxisomes
-
mitochondria
-
ribosomes
-
lysosomes
Pregunta 62
Pregunta
DIFFUSION REQUIRES
Respuesta
-
semipermeable membrane
-
a concentration gradient
-
ions
-
none of the above
Pregunta 63
Pregunta
Peroxisomes contain enzymes that detoxify harmful substances.
Respuesta
- True
- False
Pregunta 64
Pregunta
A specialized cell structure that propels the sperm is the:
Respuesta
-
flagellum
-
cilium
-
microvillus
-
microtubule
Pregunta 65
Pregunta
Diffusion of particles through a membrane by means of a carrier molecule is called:
Respuesta
-
pinocytosis
-
osmosis
-
facilitated diffusion
-
Dialysis
Pregunta 66
Pregunta
Which of the following is not a major tissue of the body?
Respuesta
-
cutaneous tissue
-
epithelial tissue
-
connective tissue
-
nervous tissue
Pregunta 67
Pregunta
The major energy production site of the cell is the:
Respuesta
-
Golgi apparatus
-
mitochondrion
-
endoplasmic reticulum
-
ribosome
Pregunta 68
Pregunta
The [blank_start]centrosome[blank_end] is often called the microtubule-organizing center.
Respuesta
-
centrosome
-
cytoskeleton
-
centriole
-
ribosome
Pregunta 69
Pregunta
Materials can be moved from a low concentration to a high concentration through:
Respuesta
-
facilitated diffusion
-
filtration
-
osmosis
-
active transport
Pregunta 70
Pregunta
Glycoproteins on the cell membrane would prevent someone with type A blood from accepting type B blood.
Respuesta
- True
- False
Pregunta 71
Pregunta
The ventral body cavity contains the:
Respuesta
-
thoracic and abdominopelvic cavities
-
heart and lungs only
-
digestive and reproductive organs
-
brain and spinal cord
Pregunta 72
Pregunta
Negative feedback mechanisms
Respuesta
-
minimize changes in blood glucose levels
-
maintain homeostasis
-
are responsible for an increased rate of sweating when air temperature is higher than body temperature
-
all of the above
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