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. Is a negative feedback process which regulates the reaction rate. If it gets too much it begins to produce less if it becomes scarce or doesn't produce enough it begins to produce more
end product inhibition
rRNA
Lysosomes
pancreas
2. Connective tissue with large amounts of either collagen fibers (making them strong) or elastic fibers - or both. Dense tissues are typically strong (e.g. bone - cartilage - tendons - etc.)
actual osmotic pressure
dense connective tissue
FMN
haversian systems
3. The band of the sarcomere that extends the full length of the thick filament. The A band includes regions of thick and thin filament overlap - as well as a region of thick filament only. A bands alternate with I bands to give skeletal and cardiac mus
elastic fibers
Secondary structure
A band
trophoblast
4. Brings blood from the fetus to the placenta.
cortisone
amniotic fluid
umbilical arteries
side chain
5. Physical process of breaking up large fat globules into smaller globules - thereby increasing the surface area that enzymes can use to digest the fat.
secondary oocytes
universal recipient
heart rate
emulsification
6. Inhibits gastric glands - stimulates pancreas to release enzymes - stimulates GB to release bile
canliculi
umbilical chord
CCK
cell cycle
7. Mucus - secreting membrane lining all body cavities or passages that communicate with the exterior
relative refractory period
basement membrane
peroxisomes
mucosa
8. Noradrenaline; chemical which is excitatory - similar to adrenaline - and affects arousal and memory; raises blood pressure by causing blood vessels to become constricted - but also carried by bloodstream to the anterior pituitary which relaxes ACTH
troponin
norepinephrine
salts
PGAL
9. An enzyme which contains a region to which small regulatory molecules may bind in addition to and separate from the substrate binding site - thereby affecting catalytic activity
fibrinogen
mucosa
allosteric enzyme
flexor
10. A coenzyme that is tightly bound to an enzyme. A prosthetic group - unlike a cosubstrate - remains bound to a specific site of the enzyme throughout the catalytic cycle of the enzyme.
neural crest
secondary response
enzyme substrate complex
prosthetic group
11. A single covalent bond derived from the coupling of thiol (R- SH) groups.
allosteric activators
alveoli
disulfide linkages
cell cycle
12. A skeletal muscle whose contraction bends a joint
coenzymes
hyperthyroidism
flexor
Eukaryotes
13. The increase in concentration of solutes from the cortex to the medulla - allows for urine hypertonicity
scrotum
alveoli
steroid hormones
osmolarity gradient
14. Blood vessels that branch from the aorta and carry oxygen - rich blood to the heart muscle
coronary arteries
proteome
dsRNA
peroxisomes
15. Water passively moves out - esp - in hypertonic medulla. Deeper more hypertonic=more H2O absorbed by kidney.
descending limb
amylose
osteoblasts
canliculi
16. When comparing two solutions - the solution with the greater concentration of solutes
immune system
gluconeogenesis
filtration
hypertonic
17. Membrane - bound space in the cytoplasm of cells used for the temporary storage of materials. Are larger than vesicles and are more likely found in plant cells.
pancreas
amylopectin
vacuole
enzyme kinetics
18. An essential structural component of living cells and source of energy for animals
Nucleoid region
carbohydrate
spermatogenesis
smooth ER
19. Corticotropin releasing factor; secreted by hypothalamus and stimulates the pituitary gland and activated adrenal gland and then get the release of corisol as part of the 'stress response'
hypophysis
heart rate
lactase
CRF
20. The endocrine system's most influential gland. Under the influence of the hypothalamus - the pituitary regulates growth and controls other endocrine glands
pituitary gland
obligate intracellular parasite
spermatozoa
receptor mediated endocytosis
21. The elastic tension of living muscles - arteries - etc. that facilitate response to stimuli
lymph capillaries
nerve terminal
universal recipient
tonus
22. Long threads made of the protein elastin. provide a rubbery quality to the extracellular matrix that complements the nonelastic strength of collagenous fibers.
acrosomal process
osteoclasts
lipases
elastic fibers
23. Found in pancreatic juice pancreatic amylase; secreted by pancreatic acinar cells; process proteins: terminal amino acids at carboxyl end of peptides
purkinje fibers
immune system
latent period
carboxypeptidase
24. Produced in muscle cells from the reduction of pyruvate (under anaerobic conditions) to regenerate NAD+ so that glycolysis can continue. A rise in lactic acid usually accompanies an increase in physical activity.
Phospholipid
peristalsis
lower esophageal sphincter
lactic acid
25. (biology) growth anew of lost tissue or destroyed parts or organs
CCK
regeneration
erythrocytes
vaginal canal
26. The developing human organism from 9 weeks after conception to birth.
amylopectin
fetus
oncotic pressure
ligaments
27. 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.
inner cell mass
platelets
immune response
hypophysis
28. 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.
ptyalin
smooth ER
Protein
thoracic cavity
29. Provides support for your body and connects all its parts. Specialized tissue includes bone - cartilage - tendons - ligaments - adipose tissue - and blood.
endoderm
Connective tissue
angiotensin
interferons
30. Used to create ATP. H+ in the thylakoid space can only diffuse down it gradient through an enzyme called ATPsynthase. ATPsynthase consists of two parts. One is a proton channel that allows the H+ to diffuse into the stroma. The other part couples thi
zymogen
proton gradient
follicles
pituitary gland
31. A digestive enzyme of the saliva that turns starch into maltose (salivary amylase)
phagocytosis
ptyalin
neural tube
hypodermis
32. Mesodermal tissue that forms connective tissue and blood and smooth muscles
thrombin
beta cells
mesenchyme
ketoacidosis
33. 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.
crossing over
prothrombin
androgens
actin
34. A gonadotropic hormone that is secreted by the anterior pituitary and stimulates growth of Graafian follicles in female mammals - and activates sperm - forming cells in male mammals
bases
FSH
metaphase II
abductor
35. Given to control diabetes insipidus and promote reabsorption of water in the kidney tubules.
larynx
nonspecific defense mechanism
vasopressin
movable joints
36. Triggering a chain reaction of othe proteins which relay the signal to the specific acting molecule
signal transduction
S phase
luteal phase
hypodermis
37. An energy storage molecule used by muscle tissue. The phosphate from creatine phosphate can be removed and attached to an ADP to generate ATP quickly.
creatine phosphate
semilunar valve
catabolism
RNAi
38. Inner tissue layer of the kidney. Contains loops of Henle and collecting tubules. Contains pyramids.
renal medulla
ascending limb
composite cell
synergistic muscle
39. Hyaline cartilage that covers ends of bones in synovial joints
articular cartilage
scrotum
thyroid gland
mucous cells
40. A period between two mitotic or meiotic divisions during which the cell grows - copies its DNA - and synthesizes proteins
epiglottis
ectoderm
interphase
dermis
41. A virus that is parasitic in bacteria. injects its nucleic acid into a bacterial cell.
thermoregulation
rRNA
endochondral ossification
bacteriophage
42. A type of glucocorticoid released by the adrenal cortex. It converts amino acids to glucose - helps to breakdown fats to fatty acids. Decreases glucose uptake by the muscles and increases blood sugar in response to stress. Strong anti - inflammatory
aldosterone
concentration gradient
vasa recta
cortisol
43. The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
red fibers
Facilitated diffusion
androgens
nuclear pore complex
44. Muscles having similar and mutualistic functions.
external nares
synergistic muscle
forces creating tertiary structure
lungs
45. The donation of valence electrons from one atom to anther to form a cation and an anion
epithelial tissue
electron transfer
PGAL
collagenous fibers
46. The neurotransmitters dopamine - epinephrine - and norepinephrine - which are active in both the brain and the peripheral sympathetic nervous system. These three molecules have certain structural similarities and are part of a larger class of neurotr
complementary pairing
fetus
catecholamines
haversian systems
47. Serves the circulatory needs of the anterior pituitary. The release of anterior pituitary hormones is controlled by neurosecretions produced by neurons of the ventral hypothalamus.
Fatty acids
calcitonin
anaphase
hypophyseal portal system
48. Any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions.
actin
myogenic activity
enzyme
umbilical vein
49. They way in which DNA base pairs are arranged
interferons
binary fission
proton gradient
obligatory base pairing
50. 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
Phospholipid bilayer
ANS
kinase
Rh factor