SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
AP Biology
Start Test
Study First
Subjects
:
science
,
ap
,
biology
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. A chemical agent that changes the rate of a reaction without being consumed by the reaction.
homologous chromosomes
stroma
diffusion
catalyst
2. The protective structure at each end of a eukaryotic chromosome. Specifically - the tandemly repetitive DNA at the end of the chromosome's DNA molecule. See also repetitive DNA.
homologous chromosomes
purines
transfer RNA
telomeres
3. The protein shell that encloses a viral genome. It may be rod-shaped - polyhedral - or more complete in shape.
capsid
cytosol
cell cycle
asexual reproduction
4. The entire spectrum of radiation ranging in wavelength from less than a nanometer to more than a kilometer.
cytosol
DNA ligase
NADP+
electromagnetic spectrum
5. The spontaneous tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
growth factor
diffusion
mismatch repair
tight junctions
6. Any substance that cannot be broken down to any other substance
element
double helix
sexual reproduction
F2 generation
7. An iron-containing protein - a component of electron transport chains in mitochondria and chloroplasts
heterotrophs
neutron
cytosol
Cytochrome
8. One of several organic compounds with the same molecular formula but different structures and therefore different properties. The three types are structural - geometric and enantiomers.
osmoregulation
nucleoid
tumor
isomers
9. An aberration in chromosome structure resulting from an error in meiosis or from mutagens; specifically - reattachment of a chromosomal fragment to the chromosome from which the fragment originated - but in a reverse orientation.
duchenne muscular dystropy
cystic fibrosis
inversion
reduction
10. Collagen most abundant in animal cells
facilitated diffusion
DNA ligase
point mutation
ECM function in support - adhesion - movement - and regulation (glycoproteins)
11. A single ATP powered pump that transports one solute can indirectly drive the active transport of several other solutes in this mechanism as the solute that has been actively transported diffuses back passively through a transport protein its movemen
mitochondria
cotransport
ribosomal RNA
beta oxidation
12. Amphipathic molecules have both hydrophobic regions and hydrophilic regions <phospholipids>.
hypertonic
tetrad
purines
amphipathic molecules
13. Typically transmembrane proteins with hydrophobic regions that completely span the hydrophobic interior of the membrane.
integral proteins
solvent
photosystem I
cotransport
14. The disruption of a cell and separation of its organelles by centrifugation.
ultra centrifuges
redox reactions
cell fractionation
food vacuoles
15. A molecule that is a constituent of the inner bilayer of biological membranes - having a polar - hydrophilic head and a nonpolar - hydrophobic tail.
free ribosomes
phospholipid
chloroplast
mismatch repair
16. An attraction between two atoms resulting from a sharing of outer shell electrons or the presence of opposite charges on the atom; the bonded atoms gain compounds outer electron shells
electronegativity
active site
chemical bonds
viral envelope
17. Use info - from the DNA to make proteins and carry out protein synthesis
aqueous solution
hybridization
ribosomes
complete dominance
18. That portion of the endoplasmic reticulum that is free of ribosomes.
smooth ER
barr body
cohesion
entropy
19. 3rd subphase in mitosis; spindle is complete and the chromosomes attached to microtubules at their kinetochores are aligned at he metaphase plate
plasmolysis
epistasis
pedigree
metaphase
20. A chemical reaction in which two molecules covalently bond to each other with the removal of a water molecule.
monosaccharides
phospholipids
dehydration reaction
rubisco Ribulose carboxylase
21. Any nonprotein molecule or ion that is required for the proper functioning of an enzyme can be permanently bound to the active site or may bind loosely with the substrate during catalysis.
sodium potassium pump
hybridization
cofactor
central vacuole
22. A functional group consisting of a hydrogen atom joined to an oxygen atom by a polar covalent bond. Molecules possessing this group are soluble in water and are called alcohols.
photosystem I
collagen
isotonic
hydroxyl groups
23. Span the membrane 1. channel proteins which have a hydrophilic channel that certain molecules or ions can use as a tunnel through the membrane (aquaporins facilitate the passage of water through the membrane) 2. carrier proteins bind to molecules and
food vacuoles
base
transport proteins
reaction center
24. A structural polysaccharide of cell walls - consisting of glucose monomers joined by b-1 - 4-glycosidic linkages.
hypertonic
Cytochrome
chromosomes
cellulose
25. Fourth subphase of mitosis in which the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell
proton
anaphase
reduction
Cell-cell recognition
26. Reproduction of cells
cell division
cytoskeleton
krebs Cycle
sister chromatids
27. The study of carbon compounds (organic compounds).
sister chromatids
dehydration reaction
anion
organic chemistry
28. The diffusion of a substance across a biological membrane
chromatin
passive transport
element
ATP
29. A dense object lying along the inside of the nuclear envelope in female mammalian cells - representing an inactivated X chromosome.
light reactions
barr body
covalent bonds
RNA polymerase
30. A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecules is attracted to the slightly negative atom of a polar covalent in another bond
duplication
freeze-fracture
spliceosome
hydrogen bond
31. A substance that reduces the activity of an enzyme by entering the active site in place of the substrate whose structure it mimics.
cell cycle
competitive inhibitor
concentration gradient
anion
32. Walled cells become _____ as a result of the entry of water from a hypotonic environment.
turgid (firm)
cell fractionation
isomers
recessive allele
33. A giant molecule formed by the joining of smaller molecules - usually by a condensation reaction. Polysaccharides - proteins - and nucleic acids are macromolecules.
macromolecule
pH
disaccharides
polyploidy
34. The form of native DNA - referring to its two adjacent polynucleotide strands wound into a spiral shape.
double helix
duchenne muscular dystropy
matter
facilitated diffusion
35. A mutation occurring when the number of nucleotides inserted or deleted is not a multiple of three - resulting in the improper grouping of the following nucleotides into codons.
C4 plants
geometric isomers
frameshift mutation
chromatin
36. A solution in which water is the solvent
growth factor
organelles
aqueous solution
pinocytosis
37. An organelle found only in plants and photosynthetic protists that absorbs sunlight and uses it to drive the synthesis of organic compounds from carbon dioxide and water.
Cell-cell recognition
chloroplasts
central vacuole
RNA processing
38. A measure of the intensity of heat in degrees reflecting molecules average kinetic energy
flagella
transport vesicles
temperature
lysosomes
39. Organization of DNA and proteins into fibrous material
photorespiration
saturated fatty acid
chromatin
introns
40. A three-nucleotide sequence of DNA or mRNA that specifies a particular amino acid or termination signal; the basic unit of the genetic code.
fermentation
wavelength
introns
codons
41. For proteins - a process in which a protein unravels and loses its native conformation - thereby becoming biologically inactive. For DNA - the separation of the two strands of the double helix. Denaturation occurs under extreme conditions of pH - sal
denaturation
mismatch repair
cytoplasm
hydroxyl groups
42. The currently accepted model of cell membrane structure - which envisions the membrane as a mosaic of individually inserted protein molecules drifting laterally in a fluid bilayer of phospholipids.
gated channels
point mutation
fluid mosaic model
genes
43. The coupling of the 'downhill' diffusion of one substance to the 'uphill' transport of another against its own concentration gradient.
electron microscope
cotransport
peroxisome
specific heat
44. Composed of nine sets of triplet microtubule arrange in a ring
cilia
krebs Cycle
electrogenic pump
centrioles
45. A membranous sac that helps move excess water out of the cell.
proton pump
heat
contractile vacuoles
mitosis
46. Proteins that facilitate the amount of diffusion)A transport protein in the plasma membrane of a plant or animal cell that specifically facilitates the diffusion of water across the membrane (osmosis).
metastasis
endoplasmic reticulum
aquaporins(water channel)
reduction
47. A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA - in some viruses).
transport proteins
gap junctions
primary transcript
genes
48. Cancerous tumor that is invasive enough to impair function of one or more organs
cellulose
cotransport
hydrogen bond
malignant tumor
49. A heritable feature.
character
electrochemical gradient
hydrocarbons
bound ribosomes
50. A cluster of several membrane proteins found in the mitochondrial crista (and bacterial plasma membrane) that function in chemiosmosis with adjacent electron transport chains - using the energy of a hydrogen ion concentration gradient to make ATP. Pr
ATP synthase
epistasis
variation
receptor mediated endocytosis