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Test your basic knowledge |
MCAT Biology 2
Start Test
Study First
Subjects
:
mcat
,
science
Instructions:
Answer 50 questions in 15 minutes.
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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. The process by which the positive and negative ions of an ionic solid become surrounded by solvent molecules
enzyme kinetics
internal intercostal muscles
Solvation
troponin
2. A nerve or muscle fibre responds completly or not at all to a stimulus
diaphragm
obligate intracellular parasite
all or none response
atrial natriuretic hormone
3. Bone forming cells
osteoblasts
adductor
synapsis
spirometer
4. The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
angiotensin I
lymphokines
Facilitated diffusion
bundle of his
5. Shaft or middle region of long bone that contains layer of spongy bone
pancreatic juice
cascade effect
enterogastrone
diaphysis
6. The spiny sublayer just below the stratum ganulosum contains cells that create an immune response to protect the body against foreign bodies that get through the first three outer sublayers of skin
lactase
telomeres
stratum spinosum
coronary veins
7. The inactive form of pepsin that is first secreted by specialized (chief) cells located in gastric pits of the stomach.
pepsinogen
ectoderm
diastole
epiphyses
8. An essential structural component of living cells and source of energy for animals.
myogenic activity
Carbohydrate
oxidation
hypodermis
9. Relatively massive bundles of subunits composed of the protein myosin that can reach 15nm in diameter
thick filaments
insulin
immune cells
lock and key theory
10. Maximum enzyme functioning velocity Decreases w/non competitive inhibitors
high energy bonds
heterotrophic
effector cell
Vmax
11. Part of the adrenal gland that produces three major groups of steroid hormones called corticosteroids.
seminiferous tubules
adrenal cortex
lamellae
microfilaments
12. Measurement of amount of blood ejected from a ventricle in one contraction
asters
stroke volume
endoderm
pancreas
13. A type of embryonic development in deuterostomes - in which each cell produced by early cleavage divisions retains the capacity to develop into a complete embryo.
diaphragm
indeterminate cleavage
heart rate
snRNP
14. The process that synthesizes a complex molecule from simpler compounds - thus requiring energy.
anabolism
myosin
cyanobacteria
tendons
15. In immune network theory - an idiotope - an antigenic site of an antibody that is responsible for that antibody binding to an antigenic determinant (epitope).
dinitrophenol
antigen binding site
telomeres
sister chromatids
16. Produce about 60% of seminal fluid - these are located at the posterior wall of the urinary bladder close to the terminus of the ductus deferens. They produce a substance that nourishes the sperm passing through the tract or that promote the fertiliz
seminal vesicles
cytoskeleton
telomeres
autolysis
17. Intestinal enzyme that completes digestion of partially digested proteins to amino acids
Glycosylation
peptidases
follicles
genetic recombination
18. (biology) growth anew of lost tissue or destroyed parts or organs
regeneration
spindle apparatus
clot
collagen
19. 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
pineal gland
peroxisomes
zona pellucida
movable joints
20. A biomolecule that binds to the regulatory site of an allosteric protein and thereby modulates its activity. An allosteric modulator may be an activator or an inhibitor. Also known as the allosteric effector.
allosteric modulator
spermatogenesis
AMP
basophils
21. A fatty acid possessing one or more double bonds between the carbons in the hydrocarbon tail. Such bonding reduces the number of hydrogen atoms attached to the carbon skeleton.
cristae
articular cartilage
Unsaturated fatty acid
cortical reaction
22. Generalized edema with accumulation of serum in subcutaneous connective tissue
anasarca
purkinje fibers
structural proteins
synovial fluid
23. The presence of an abnormally high level of carbon dioxide in the circulating blood
hypercapnia
appendicular skeleton
ejaculatory duct
external nares
24. An enzyme that catalyzes the elongation of new DNA at a replication fork by the addition of nucleotides to the existing chain.
primary spermatocytes
salts
DNA polymerase
ATP synthetase
25. Support sperm formation; development and maintenance of male secondary sex characteristics
androgens
phophodiesterase
testicular feminization
holoenzyme
26. A chemical reaction in which two molecules covalently bond to each other with the removal of a water molecule.
alpha helix
Dehydration synthesis
induced fit model
cell cycle
27. Also called the birth canal - canal in the female from the vulva to the cervix that receives the penis in intercourse
CCK
secretion
vaginal canal
thin filaments
28. Attack general invading pathogens. Three types are neutrophils - basophils and eosinophils.
haversian canal
spindle apparatus
calcitonin
granular leukocytes
29. Connective tissue cells that produce fibrous components of extracellular matrix like collagen and elastin
Glycosylation
G2 phase
fibroblasts
Bacteria
30. The fourth and final phase of meiosis II. Telophase II is identical to mitotic telophase - except that the number of chromosomes was reduced by half during meiosis. I.
synapsis
BNP
ptyalin
telophase II
31. The female reproductive cell
ovum
ejaculatory duct
nerve terminal
obligate intracellular parasite
32. Glands located in the walls of the stomach - secreting the hormone gastrin in response to certain substances in food.
morula
HCl
visceral pleura
pyloric glands
33. From the umbilical vein - where most of the fetal blood flows through the liver
fallopian tube
posterior pituitary
white fibers
ductus venosus
34. It is the lowermost layer of the integumentary system in vertebrates. Types of cells that are found in the hypodermis are Fibroblasts - Adipose Cells - and Macrophages
ovaries
hypodermis
signal transduction
gametocytes
35. Excited electrons are passed from protein to protein in the thylakoid membrane
pituitary gland
ETS
hypothyroidism
noncompetitive inhibition
36. An internal membrane system in which components of cell membrane and some proteins are constructed. Involved of the transport of materials throughout the cell.
endoplasmic reticulum
Hydrolysis
ubiquinone
catecholamines
37. A thick - transpartent coating rich in glycoproteins that surrounds an oocyte.
zona pellucida
cretinism
anaphase II
tetanus
38. The two types of white blood cells that are part of the body's immune system: B lymphocytes form in the bone marrow and release antibodies that fight bacterial infections; T lymphocytes form in the thymus and other lymphatic tissue and attack cancer
thermoregulation
lymphocytes
larynx
sarcoplasm
39. The period of the cell cycle during which the nucleus is not undergoing division - typically occurring between mitotic or meiotic divisions
flexor
HRH
Interphase
chymotrypsin
40. A neuron conducting impulses outwards from the brain or spinal cord
articular cartilage
white fibers
motor neuron
urethra
41. A large polysaccharide composed of many glucose monomers linked into cable - like fibrils that provide structural support in plant cell walls. Contains B- linkages.Animals cannot digest the B- linkages of this molecule.
plasma
S phase
prophase II
Cellulose
42. A group of hereditary bleeding disorders in which there is a defect in clotting factors necessary for the coagulation of blood
chemiosmosis
prosthetic group
ADH
hemophilia
43. 4th and last phase of mitosis - the 2 sets of chromosomes arrive at opposite ends of the cell and new nuclei form around each new set
telopahse
atrioventricular valves
melanocyte
yellow marrow
44. A neural structure lying below the thalamus; directs eating - drinking - body temperature; helps govern the endocrine system via the pituitary gland - and is linked to emotion
hypothalamus
oxaloacetate
actual osmotic pressure
myosin
45. Any of the small tubules that are the excretory units of the vertebrate kidney - functional unit of the kidney
cytochrome oxidase
cristae
nephron
Denaturation
46. (anatomy) a muscular partition separating the abdominal and thoracic cavities
sarcoplasmic reticulum
prolactin
activation energy
diaphragm
47. The presence - or lack - of antigens on the surface of red blood cells that may cause a reaction between the blood of the mother and fetus - resulting in fetal anemia
parietal pleura
catabolism
GH
Rh factor
48. The structure that attaches most epithelia to underlying tissue; consists of carbohydrates and proteins secreted by the epithelia and the underlying connective tissue.
basement membrane
intermembrane space
external intercostal muscles
umbilical arteries
49. An acute and potentially fatal infection of the central nervous system caused by a toxin produced by the tetanus bacteria
Phospholipid
vital capacity
tetanus
potential osmotic pressure
50. Small organic molecule that regulates the activity of an enzyme for: Neither the substrate or immediate product / Binds to one of the two forms of the enzyme / Binds at allosteric site (regulatory site) / Distinct from the active site: Stabilizes enz
BNP
blastocyst
allosteric effector
pituitary gland
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