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Test your basic knowledge |
CLEP Natural Science
Start Test
Study First
Subjects
:
clep
,
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. Classification of plant which survives only a single season
stigma
substrate
annuals
endocytic vesicles
2. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
angiosperms
glycolysis
cytoskeleton
cristae
3. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
grana
glycolysis
inhibitor
metabolism
4. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
cytokinesis
golgi apparatus
transduction
facilitated diffusion
5. Small - dense region within most nuclei in which the assembly of RNA proteins begins
active site
annuals
interphase
nucleolus
6. In photosynthesis - this is the splitting of water by light
post-transcriptional processing
photolysis
centromere
facilitated diffusion
7. Projections on cell membrane increase surface area
homologs
ovules
microvilli
biennial
8. Breakdown of more complex substances into simpler ones with release of energy
cell wall
diploid
cell
catabolism
9. Modification of a cell by the incorporation of exogenous DNA
transformation
endosymbiont hypothesis
mitochondria
vascular plants
10. Classification of plant whose life cycle survives two seasons
angiosperms
centromere
transcription
biennial
11. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
exocytosis
glycolysis
DNA
catabolism
12. (adenosine triphosphate) main energy source that cells use for most of their work
ATP
nucleolus
centromere
gene
13. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
translation
interphase
krebs cycle
chlorophyll
14. The regular sequence of growth and division that cells undergo
gametes
cell membrane
cell cycle
ribosomes
15. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
cofactor
exocytosis
codon
post-transcriptional processing
16. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
ribosomes
reduction
angiosperms
krebs cycle
17. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
genome
ribosomes
vascular plants
pistil
18. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
ovary
endosymbiont hypothesis
gene
reduction
19. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
interphase
secretory vesicles
tonoplast
nucleosome
20. Living thing
crossing over
organism
anaphase
pedicel
21. A cell having two sets of chromosomes or twice the haploid number
transformation
diploid
nucleosome
cell wall
22. Stores - packages and ships proteins
golgi apparatus
biennial
microfilaments
lysosomes
23. Cells that lack a membrane-bound nucleus and membrane-bound organelles
metaphase
ovary
prokaryotes
perennial
24. The first stage of mitosis - forming spindle fibres attached to the centromere
cell cycle
cell
prophase
active transport
25. Smallest unit of most living things
virus
endocytic vesicles
pedicel
cell
26. Proteins that act as biological catalysts
enzymes
genome
perennial
filament
27. Production of a chemical compound by a living organism
crossing over
biosynthesis
facilitated diffusion
metabolism
28. Cell division which produces two identical cells
mitosis
meiosis
catabolism
ATP
29. Double-stranded chains of proteins which give structure to the cell
microfilaments
golgi apparatus
carbon dioxide fixation
centrioles
30. Transport of a substance across a cell membrane against the concentration gradient
ATP
cell membrane
active transport
nuclear pores
31. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
organism
cell wall
electron transport
32. Powerhouse of the cell - organelle that is the site of ATP (energy) production
cell wall
mitochondria
ovules
transduction
33. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
microfilaments
nucleosome
cristae
anaphase
34. A substance that must join with the enzyme to enable it to fit the substrate
gene
vascular plants
catabolism
cofactor
35. Sequence of DNA that codes for a protein and thus determines a trait
electron microscope
ovary
gene
electron transport
36. The second phase of mitosis - during which the chromosomes line up across the center of the cell
active transport
golgi apparatus
tonoplast
metaphase
37. The complete genetic material contained in an individual
eukoryotic cells
genome
enzymes
prokaryotes
38. The part of an enzyme where the chemical reaction occurs
active site
meiosis
photolysis
crossing over
39. Green pigment contained in the grana
chlorophyll
endocytic vesicles
stigma
crossing over
40. Have tissues made of cells that transport water and nutrients throughout the plant
DNA
mitochondria
annuals
vascular plants
41. Sticky portion at the top of the style which traps pollen
gene
photolysis
mitochondria
stigma
42. Consists of DNA tightly coiled around proteins
perennial
fermentation
centrioles
chromatin
43. Formed when cell membrane surrounds a molecule outside the cell and ingests it
crossing over
pedicel
fermentation
endocytic vesicles
44. Cell organelle filled with enyzmes need to break down certain materials in the cells
homologs
lysosomes
electron transport
microfilaments
45. Vacuole membrane
perennial
tonoplast
facilitated diffusion
metabolism
46. Structure within ovary of plant that contains egg cells
filament
ovules
angiosperms
secretory vesicles
47. A cell having only one complete set of chromosomes
nucleosome
stigma
haploid
exocytosis
48. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
cytoskeleton
prokaryotes
alleles
virus
49. A substance that retards or stops enzymatic activity
golgi apparatus
chromatin
homologs
inhibitor
50. The stalk of a stamen that supports the anther
exocytosis
microtubules
filament
organelles