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 regularity protein whose concentration fluctuates cyclically
electrochemical gradient
proton motive force
cyclin
gametes
2. A reaction in which two molecules become covalently bonded to each other through the loss of a small molecule - usually water; also called dehydration reaction.
life cycle
chemical bonds
condensation reaction
cation
3. Differences between members of the same species.
valence electrons
trans face
mesophyll cell
variation
4. Are not embedded in the lipid bilayer at all. Instead - the are loosely bound to the surface of the protein - often connected to integral proteins
free energy
mitotoic phase
Peripheral proteins
actin
5. A substance that reduces the activity of an enzyme by binding to a location remote from the active site - changing its conformation so that it no longer binds to the substrate.
trace elements
polygenic inheritance
noncompetitive inhibitor
phosphate group
6. A set of three-nucleotide-long words that specify the amino acids for polypeptide chains.
cotransport
triplet code
polyribosomes
diffusion
7. The arrangement of phospholipids and proteins in biological membranes is described by the
chemical bonds
smooth ER
condensation reaction
fluid mosaic model
8. The study of carbon compounds (organic compounds).
fertilization
collagen
organic chemistry
amino acid
9. An organic compound with a carbonyl group of which the carbon atom is bonded to two other carbons.
reaction center
ketone
ligands
nondisjunction
10. Sites where the replication of a DNA molecule begins.
origins replication
electrogenic pumps
G2 phase
plastids
11. An organic molecule serving as a cofactor. Most vitamins function in important metabolic reactions.
coenzyme
RNA splicing
photorespiration
mismatch repair
12. The form of native DNA - referring to its two adjacent polynucleotide strands wound into a spiral shape.
solute
photosystem I
double helix
bacteriophage
13. ATP can power active transport by transferring a phosphate group from ATP to the transport protein. This may induce a conformation change in the transport proteins translocating the solute across the membrane
flagella
stroma
smooth ER
ATP
14. A protein covalently attached to a carbohydrate.
DNA ligase
glycoproteins
cytokenisis
binary fission
15. Cytokenisis process; pinching of the plasma membrane; the succession of rapid cell division without growth during early embryonic development that converts the zygote into a ball of cell
passive transport
cleavage
phagocytosis
membrane potential
16. A type of strong chemical bond in which two atoms share one pair of valence electrons
covalent bonds
template strand
translation
Peripheral proteins
17. A functional group important in energy transfer.
nondisjunction
phosphate group
element
intermediate filaments
18. An enzyme that links together the growing chain of ribonucleotides during transcription.
mitotoic phase
RNA polymerase
C3 plants
nucleic acid
19. An accessory pigment - either yellow or orange - in the chloroplasts of plants. By absorbing wavelengths of light that chlorophyll cannot - carotenoids broaden the spectrum of colors that can drive photosynthesis.
metastasis
tight junctions
noncyclic electron flow
carotenoids
20. A type of photosynthetic cell arranged into tightly packed sheaths around the veins of a leaf.
bundle sheath cell
contractile vacuoles
central vacuole
carbonyl groups
21. The enzyme that catalyzes the first step of the Calvin cycle (the addition of CO2 to RuBP - or ribulose bisphosphate).
cofactor
pleiotropy
true breeding
rubisco Ribulose carboxylase
22. Many ion channels function as gated channels these channels open or close depending on the presence or absence of a chemical or physical stimulus
neutron
enantiomers
template strand
gated channels
23. A virus that infects bacteria; also called a phage. See phage.
lysosomes
bacteriophage
actin
carboxyl group
24. The splitting of glucose into pyruvate. Glycolysis is the one metabolic pathway that occurs in all living cells - serving as the starting point for fermentation or aerobic respiration
binary fission
glycolysis
light reactions
enantiomers
25. The synthesis of RNA on a DNA template.
transcription
cytoskeleton
microfilaments
voltage
26. The reciprocal exchange of genetic material between nonsister chromatids during synapsis of meiosis I.
gametes
crossing over
nucleolus
NaD+
27. (1) A lineage of genetically identical individuals or cells. (2) In popular usage - a single individual organism that is genetically identical to another individual. (3) As a verb - to make one or more genetic replicas of an individual or cell. See a
electronegativity
free ribosomes
fatty acid
clone
28. A mutation involving the addition of one or more nucleotide pairs to a gene.
missense mutations
glycolysis
allosteric site
insertion
29. The complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing -exists as a mass of very long - thin fibers that are not visible with a light microscope.
chloroplasts
solvent
dehydration reaction
chromatin
30. Center of manufacturing - warehousing - sorting - and shipping products are usually modified during their transit from the cis pole to the trans pole
actin
beta oxidation
integral proteins
golgi apparatus
31. A gene located on a sex chromosome.
terminator
sex linked genes
oxidation
phagocytosis
32. Use info - from the DNA to make proteins and carry out protein synthesis
spectrophotometer
meiosis
G1 phase
ribosomes
33. The specific portion of an enzyme that attaches to the substrate by means of weak chemical bonds.
membrane potential
active site
anticodon
prophase
34. The principle whereby every energy transfer or transformation increases the entropy of the universe. Ordered forms of energy are at least partly converted to heat - and in spontaneous reactions - the free energy of the system also decreases.
proton
catalyst
2nd law of thermodynamics
cotransport
35. A family tree describing the occurrence of heritable characters in parents and offspring across as many generations as possible.
ribosomes
aerobic
action spectrum
pedigree
36. The tendency of molecules of any substance to spread out in the available space it is driven by intrinsic kinetic energy (thermal motion or heat) of molecules
genetic recombination
transcription
nondisjunction
diffusion
37. A steroid that forms an essential component of animal cell membranes and acts as a precursor molecule for the synthesis of other biologically important steroids.
osmosis
cotransport
barr body
cholesterol
38. The X-shaped - microscopically visible region representing homologous chromatids that have exchanged genetic material through crossing over during meiosis.
polymer
chiasmata
active transport
cyclic electron flow
39. 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.
genetic recombination
organelles
endergonic reaction
unsaturated fatty acid
40. The passive transport of water; diffusion of water across a selectively permeable membrane; the direction of osmosis is determined only by a difference in total solute concentration ; the kind of solutes in the solution do not matter
Cytochrome
benign tumor
template strand
osmosis
41. That portion of the electromagnetic spectrum detected as various colors by the human eye - ranging in wavelength from about 380 nm to about 750 nm.
cholesterol
diffusion
visible light
gametes
42. The conversion of a normal animal cell to a cancerous cell.
transformation
voltage
cell division
cofactor
43. An enzyme that untwists the double helix of DNA at the replication forks.
aquaporins(water channel)
recessive allele
helicase
chiasmata
44. A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA - in some viruses).
stroma
genes
double helix
compound
45. Material present in the cytoplasm of all eukaryotic cells - important during cell division; the microtubule-organizing center.
hydrolysis
centrosome
plasma membrane
electron transport chain
46. The new continuous complementary DNA strand synthesized along the template strand in the mandatory 5' 3' direction.
amniocentesis
cytokenisis
G2 phase
leading strand
47. Drive the diffusion of ions across a membrane 1. chemical force based on an ions concentration gradient. 2. the other is an electrical force based on the effect of the membrane potential on the ion's movement ion diffuses down its electrochemical gra
electrochemical gradient
nucleolus
calvin cycle
isomers
48. An organelle in eukaryotic cells consisting of stacks of flat membranous sacs that modify - store - and route products of the endoplasmic reticulum.
plastids
DNA ligase
golgi apparatus
solution
49. A long cellular appendage specialized for locomotion - formed from a core of nine outer doublet microtubules and two inner single microtubules - ensheathed in an extension of plasma membrane.
frameshift mutation
carbohydrates
flagella
hemophilia
50. Nuclear division process; prophase - prometaphase - metaphase - anaphase - and telophse
competitive inhibitor
catalyst
mitosis
true breeding