SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
MCAT Biology 2
Start Test
Study First
Subjects
:
mcat
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. These are absorbed by the intestinal wall cells and are made up of fatty acids and monoacylglycerols. - formed when amphipathic molecules are mixed with water - polar regions on outside - non polar regions on inside
enzyme substrate complex
micelles
intrapleural space
Golgi apparatus
2. Any of a large group of nitrogenous organic compounds that are essential constituents of living cells. Built from a chain of amino acids linked polypeptide bonds.
Protein
filtration
Passive immunity
seminiferous tubules
3. The process by which the positive and negative ions of an ionic solid become surrounded by solvent molecules
vagus nerve
Solvation
corticosteroids
thermoregulation
4. One of the formed elements present in our blood. They function in hemostasis (blood clot formation). They are cell fragments of large multinucleate cells (megakaryocytes) formed in the bone marrow. They appear to be irregular - darkly stained shapes.
ureter
afferent arteriole
thoracic cavity
platelets
5. A small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication
epididymus
plasmid
countertransport
Primary structure
6. Form gametes which combine to form zygotes that develope into more sporozoites
androgens
contraction period
secondary response
gametocytes
7. Bone forming cells
osteoblasts
periosteum
movable joints
acidosis
8. Generate and degrade H2O2 in performing various metabolic functions transfer hydrogen from various substrates to oxygen and they produce H2O2. Use O2 to break down fatty acids that can be sent to mitochondria
insulin
peroxisomes
synaptic bouton
Vmax
9. Specific immunity produced by B cells that produce antibodies that circulate in body fluids
humoral immunity
buffers
ANS
ADH
10. A band of cells along the border where the neural tube pinches off from the ectoderm; the cells migrate to various parts of the embryo and form the pigment cells in the skin - bones of the skull - the teeth - the adrenal glands - and parts of the per
Hydrolysis
neural crest
neuromuscular junction
afferent arteriole
11. Found within the lymph nodes - they are phagocytes that destroy bacteria - cancer cells - and other foreign matter in the lymphatic stream.
synaptic cleft
macrophages
bile
endothelial cell
12. A globular protein that links into chains - two of which twist helically about each other - forming microfilaments in muscle and other contractile elements in cells.
motor neuron
rRNA
mesenchyme
actin
13. The most common antibodies. passable through the placenta. provides passive immunity. aka gamma globulin
tricuspid valve
IgG
platelets
excretion
14. Amount of air that can be forcefully exhaled after a normal tidal volume exhalation
Conjugated protein
expiratory reserve volume
diastole
ptyalin
15. Area of prokaryotic cells where the DNA is concentrated.
Nucleoid region
essential amino acids
stratum spinosum
noncompetitive inhibition
16. When immunity relies on lymphoctyes - like helper and killer t cells - the first type of t cells activating the latter - which ruptures macrophage and kills the infected cell
troponin
synovial capsule
cell mediated immunity
cilia
17. Chemicals produced by the body break foods into their smaller chemical building blocks
endochondral ossification
chemical digestion
tonus
somatostatin
18. From the umbilical vein - where most of the fetal blood flows through the liver
ductus venosus
allosteric modulator
chylomicrons
yolk sac
19. Has both a hydrophilic (polar) phosphoric acid and a hydrophobic (non - polar) fatty acid region. Hydrophilic regions are found on the outside of the membrane and hydrophobic regions are found on the interiorof the membrane. Structure allows for sele
androgens
Phospholipid bilayer
telophase II
coronary sinus
20. The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.
atoms
myosin
white fibers
basement membrane
21. The opening through which food is taken in and vocalizations emerge
ed blood cells
cotransport
oral cavity
atrioventricular valves
22. The layer of epidermis immediately under the stratum corneum in the skin of the palms and soles
skeletal muscle
allosteric effector
polar body
stratum lucidum
23. End of humerous that is closer to the shoulder
posterior pituitary
oxaloacetate
allantois
proximal end
24. Immunoglobulin. Less than 3%. Found only as a receptor on B cell membrane - Doesn't allow antigens to get into the body - Not secreted - stays attached to B cell
virus
heterotrophic
cardiac sphincter
IgD
25. Fibers in the ventricles that transmit impulses to the right and left ventricles - causing them to contract
autosomal cell
purkinje fibers
islets of langerhans
TRH
26. Process by which a liquid or gas passes through a filter to remove wastes
atrioventricular node
microbodies
filtration
Glycosylation
27. The junction between a nerve fiber and the muscle it supplies
neuromuscular junction
filtration
articular cartilage
heart rate
28. Condition of congenital hypothyroidism in children that results in a lack of mental development and dwarfed physical stature; the thyroid gland is either congenitally absent or imperfectly developed
diaphysis
heavy chains
ductus arteriosus
cretinism
29. Reproduction of some unicellular organisms (such as yeasts) by growth and specialization followed by the separation by constriction of a part of the parent
HCl
striated muscle
thymosin
budding
30. Two tiny structures located in the cytoplasm near the nuclear envelope. They direct the seperation of chromosomes during cell division.
urethra
dsRNA
centrioles
umbilical vein
31. Small - elongated mass of specialized cardiac muscle tissue just beneath the epicardium in the right atrium near the opening of the superior vena cava - starts impulses
angiotensin I
sinoatrial node
neural tube
glucagon
32. Blind U- shaped pouch that is the first portion of the large intestine
cecum
distal convoluted tubule
dsRNA
flexor
33. Small nuclear ribonucleoproteins; recognize the splice sites in the pre - mRNA; located in the nucleus and are composed of proteins and RNA
descending limb
ectoderm
tropomyosin
snRNP
34. Clusters of cells surrounding a single egg. Its function is to help an egg mature for release into the reproductive tract - where it can be fertilized
Glucose
tRNA
follicles
exoskeleton
35. Organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells
humoral immunity
cytokinesis
gluconeogenesis
follicular phase
36. Non - membrane bound organelles - large - ATP- dependant - a giant protein complex that recognizes and destroys proteins tagged for elimination by the small protein ubiquitin
proteasomes
oxidation
subatomic particle
genetic recombination
37. The movement of specific molecules into a cell by the inward budding of membranous vesicles containing proteins with receptor sites specific to the molecules being taken in; enables a cell to acquire bulk quantities of specific substances.
receptor mediated endocytosis
peroxisomes
frequency summation
somatic cell
38. The potential energy stored in the form of an electrochemical gradient - generated by the pumping of hydrogen ions across biological membranes during chemiosmosis.
proton motive force
inflammatory response
fetal hemoglobin
structural proteins
39. The reduced form of NAD+ (nicotinamide adenine dinucleotide). This is the most common electron carrier in cellular respiration.
NADH
dialysis
nucleotides
centrisomes
40. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
chromatin
regeneration
Telophase
amniotic fluid
41. Diploid cells resultinf rom the activation of a spermatogoium; primary spermatocytes are ready to enter meiosis I. remember: cyte means ready to undergo meiosis.
ectoderm
cytokinesis
primary spermatocytes
pyrophosphate
42. Produced by the thymus gland during childhood - this hormone stimulates T- lymphocyte development and differentiation.
telophase I
seminal vesicles
thymosin
secondary spermatocytes
43. Lipoproteins formed in the cells lining the small intestine following absorption of fats. they are made in the small intestinal cells and transpost dietary lipids to the liver.
amphipathic
elastic fibers
Chylomicrons
enzyme
44. The inner germ layer that develops into the lining of the digestive and respiratory systems
endometrium
autosomal cell
ANS
endoderm
45. The form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low - we feel hunger. Accounts for 80% of carbs absorbed by humans.
sinoatrial node
RNAi
Glucose
smooth ER
46. Any substance (as a toxin or enzyme) that stimulates the production of antibodies
ectoderm
antigen
Passive immunity
tricuspid valve
47. The process of cytokinesis in animal cells - characterized by pinching of the plasma membrane; specifically - the succession of rapid cell divisions without growth during early embryonic development that converts the zygote into a ball of cells.
osteocytes
cleavage
extracellular digestion
secretion
48. The compartment of the mitochondrion enclosed by the inner membrane and containing enzymes and substrates for the Krebs cycle.
catabolism
proton motive force
allosteric inhibitor
mitochondrial matrix
49. Precursor of the digestive enzyme chymotrypsin. comes from the acinar cells in the pancreas and is activated by autocatalysis or by trypsin (the active form of trypsinogen)
CRF
vasopressin
chymotrypsinogen
endocrine glands
50. Nicotinamide adenine dinucleotide phosphate - an acceptor that temporarily stores energized electrons produced during the light reactions.
primary spermatocytes
mesenchyme
sucrase
NADP