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. Located at the base of the esophagus and functions to prevent food materials from entering the esophagus from the stomach
seminiferous tubules
centrioles
cardiac sphincter
feedback inhibition
2. Bone marrow that is yellow with fat; found at the ends of long bones in adults
G2 phase
yellow marrow
GnRH
chemiosmosis
3. Neurohormone secreted by the heart in response to ventricular expansion. Elevated greater than 100 pg/mL indicates some heart failure
tonus
Nucleotide
BNP
secretion
4. Sarcomere region with thick filaments only - located in center of sacromere; myosin only; become smaller when contraction takes place.
vulva
H band
afferent arteriole
oxidative phosphorylation
5. (biology) growth anew of lost tissue or destroyed parts or organs
synergistic muscle
phagocytosis
deuterstomes
regeneration
6. The male gonads - which produce sperm and secrete male sex hormones.
hepatic portal vein
renin angiotensin system
cilia
testes
7. The part of the small intestine between the jejunum and the cecum - End portion of the small intestine
flagella
Cofactor
ileum
stratum granulosum
8. Organisms that first forms a mouth when it develops.
lamellae
protostomes
Primary structure
genetic recombination
9. Series of events that cells go through as they grow and divide
cell cycle
metaphase
haversian systems
hypertonic
10. (anatomy) a muscular partition separating the abdominal and thoracic cavities
blastula
sarcoplasmic reticulum
diaphragm
renin
11. Space between the two membranes - visceral pleura and parietal pleura - that cover the lungs.
intrapleural space
hemophilia
rRNA
osteoblasts
12. Blood cells containing hemoglobin that carry oxygen through the bloodstream
stratum spinosum
spliceosome
ed blood cells
umbilical vessels
13. Proteins with short chains of sugars attached to them; in eukaryotic cells they are important membrane proteins that allow cell - cell recognition and interaction.
Secondary structure
motor neuron
Glycoproteins
membrane carrier
14. This part of the pituitary does not produce hormones - but stores and releases oxytocin and ADH.
proton gradient
atrial natriuretic hormone
mitochondria
posterior pituitary
15. Units in the microscopic structure of mammalian bone. layers of mineralized matrix are deposited around a central canal containing blood vessels and nerves that service the bone
haversian systems
side chain
epiglottis
osmotic pressure
16. The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron
diabetes mellitus
spermatogenesis
sister chromatids
synapse
17. The most widespread connective tissue in the vertebrate body. It binds epithelia to underlying tissues and functions as packing material - holding organs in place.
anasarca
haversian canal
carboxypeptidase
loose connective tissue
18. An energy carrier that transport less energy than NADH but more than ATP
visceral pleura
telophase I
FADH
scrotum
19. A complex assembly that interacts with the ends of an RNA intron in splicing RNA - releasing the intron and joining the two adjacent exons.
angiotensin II
Binary fission
NADH
spliceosome
20. Any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
plasma
hypodermis
helper T cells
zymogen
21. Distinct cells that carry out each stage of immune response. Derived from a common pluripotential hematopoietic stem cell in the bone marrow.
IgD
basement membrane
feedback inhibition
immune cells
22. The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.
intron
atoms
peristalsis
collecting duct
23. The two upper chambers of the heart - the receiving areas that pool incoming blood.
duodenum
dinitrophenol
Nucleic acids
atria
24. A method of metabolic control in which the end product of a metabolic pathway acts as an inhibitor of an enzyme within that pathway
feedback inhibition
PTH
luteal phase
anterior pituitary
25. The tendency of certain factors to stablize the hemoglobin in the tense conformation - thus reducing its affinity for oxygen and enhancing the relase of oxygen to the tissues. The factors include increased PCO2 - increase temperature - increased bisp
bohr effect
Michaelis constant
ileum
osteons
26. The removal of an amino group from an organism - particularly from an amino acid
thin filaments
anaphase I
total lung capacity
deamination
27. Where myosin heads can attach. 2 proteins usualy cover the locations of attachments for the myosin heads: troponin and tropomyosin.
amphipathic
myosin binding sites
intracellular digestion
renal artery
28. Alpha helix and beta pleated sheet formed through formation of hydrogen bonds. - The second level of protein structure; the regular local patterns of coils or folds of a polypeptide chain.
macrophages
Secondary structure
semilunar valve
chorionic villi
29. Exocrine gland - in men - at the base of the urinary bladder that secretes the fluid part of semen into the urethra during ejaculation
prostate gland
thoracic cavity
rRNA
sarcoplasmic reticulum
30. In the testes - these cells lie between the seminiferous tubules and produce the hormone testosterone
alpha helix
interstitial cells
salts
pancreas
31. A bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen
immune response
negative pressure breathing
mitral valve
stratum spinosum
32. A virus that is parasitic in bacteria. injects its nucleic acid into a bacterial cell.
bacteriophage
telomeres
secondary oocytes
primary oocytes
33. The hollow ball of cells marking the end stage of cleavage during early embryonic development
blastula
prokaryotes
hydrostatic pressure
Hydrophobic
34. 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)
chymotrypsinogen
archenteron
gastrula
Steroids
35. Points in which two cells are fastened together into strong sheets. Intermediate filaments anchor these. Also called anchoring junctions.
desmosomes
pharynx
B lymphocyte
allosteric effector
36. Sequence of nucleotides on a gene that gets transcribed and translated
vital capacity
exon
noncompetitive inhibition
Cytochromes
37. A muscle that is connected at either or both ends to a bone and so move parts of the skeleton
releasing hormones
troponin
alimentary canal
striated muscle
38. The substance acted upon by an enzyme or ferment
proton motive force
substrate
anaphase I
ATP
39. Occurs across the placenta - fetal lungs do not become functional until birth.
somatotropin
granular leukocytes
fetal gas exchange
adenylate cyclase
40. Any nonprotein molecule or ion that is required for the proper functioning of an enzyme. Cofactors can be permanently bound to the active site or may bind loosely with the substrate during catalysis.
melanocyte
second messenger
norepinephrine
Cofactor
41. 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.
Prostaglandins
semiautonomous
actin
proenzyme
42. A flap of cartilage that covers the windpipe while swallowing
epiglottis
lower esophageal sphincter
Steroids
pancreatic juice
43. Spindle fibers attach to the chromosomes. The chromosomes then line up across the center of the cell.
metaphase I
Primary structure
nucleotides
tonus
44. Neurological tissue in the center of the heart that receives and amplifies the conduction of impulses from the SA node to the bundle of His
linked genes
Secondary structure
villi
atrioventricular node
45. A nerve or muscle fibre responds completly or not at all to a stimulus
prosthetic group
anaphase
H band
all or none response
46. Antiviral proteins secreted by T cells; they also stimulate macrophages to ingest bacteria
lymph
target organs
nuclear pore complex
interferons
47. Microtubules and fibers that radiate out from the centrioles
asters
atria
parietal cells
receptor mediated endocytosis
48. The first phase of meiosis II. Prophase II is identical to mitotic prophase - except that the number of chromosomes was reduced by half during meiosis I. - microtubules attach to duplicated chromosomes in each of the 2 haploid daughter cells
larynx
hepatic portal vein
Terpene
prophase II
49. 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
bases
ptyalin
catecholamines
cell cycle
50. A type of RNA - synthesized from DNA - that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein; also called messenger RNA.
metaphase II
A band
mRNA
concentration gradient