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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. A substance that must join with the enzyme to enable it to fit the substrate
carbon dioxide fixation
cofactor
enzymes
cell
2. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
nucleosome
active site
nucleolus
telophase
3. Cell division that produces reproductive cells in sexually reproducing organisms
metaphase
mutation
meiosis
pedicel
4. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metaphase
angiosperms
gametes
glycolysis
5. Membrane-bound organelle that stores water and soluble substances
chlorophyll
cell membrane
nuclear pores
vacuole
6. The complete genetic material contained in an individual
alleles
genome
haploid
secretory vesicles
7. Matching Chromosomes that are similar but not identical
gametes
homologs
stigma
mitochondria
8. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
microtubules
golgi apparatus
prosthetic group
photolysis
9. The substance acted upon by an enzyme
angiosperms
chlorophyll
exocytosis
substrate
10. Two identical chromosomes that split and contain the same genetic material
carbon dioxide fixation
cell membrane
chromatids
endoplasmic reticulum
11. Vacuole membrane
tonoplast
cristae
chromatids
meiosis
12. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
angiosperms
cell cycle
diploid
carbon dioxide fixation
13. Pores which allows materials to move in and out of the cell nucleus
genome
lysosomes
glycolysis
nuclear pores
14. The organic process whereby the DNA sequence in a gene is copied into mRNA
ovary
anther
microvilli
transcription
15. The part of the stamen that contains pollen
anther
codon
centrioles
nucleosome
16. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
prophase
mitosis
vascular plants
17. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
microfilaments
cofactor
pedicel
18. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
genome
shoot apex
krebs cycle
facilitated diffusion
19. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
reduction
electron microscope
active site
stroma
20. Double-stranded chains of proteins which give structure to the cell
metaphase
ATP
post-transcriptional processing
microfilaments
21. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
pedicel
annuals
DNA
22. The process of transfering genetic material from one cell to another
cofactor
transduction
pistil
perennial
23. The part of an enzyme where the chemical reaction occurs
krebs cycle
active site
microvilli
glycolysis
24. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
transcription
chlorophyll
mitochondria
ribosomes
25. Process of building up complex materials (proteins) from simple materials
stigma
carbon dioxide fixation
anabolism
translation
26. The female part of a flower composed of ovary and style and stigma and ovules
active site
glycolysis
pistil
microtubules
27. Consists of DNA tightly coiled around proteins
chromatin
genome
prokaryotes
tonoplast
28. The stalk of a stamen that supports the anther
filament
translation
endosymbiont hypothesis
cristae
29. Have tissues made of cells that transport water and nutrients throughout the plant
reduction
mutation
cell membrane
vascular plants
30. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
golgi apparatus
metaphase
cristae
perennial
31. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
chlorophyll
metabolism
stroma
translation
32. (adenosine triphosphate) main energy source that cells use for most of their work
photolysis
reduction
ATP
ovules
33. The organ that bears the ovules of a flower - base of the pistil
stroma
ovary
lysosomes
golgi apparatus
34. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
active site
organism
perennial
35. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
anaphase
carbon dioxide fixation
telophase
genome
36. Has a nucleus - has organelles or other cell parts
cell wall
alleles
eukoryotic cells
prokaryotes
37. Composed of a bilayer of lipids embedded with globular proteins
ovules
genome
stigma
cell membrane
38. Stalk that supports the flower
biosynthesis
alleles
perennial
pedicel
39. The regular sequence of growth and division that cells undergo
fermentation
cell cycle
filament
metaphase
40. Small - dense region within most nuclei in which the assembly of RNA proteins begins
vacuole
filament
nucleolus
annuals
41. Breakdown of more complex substances into simpler ones with release of energy
gene
catabolism
crossing over
filament
42. Sticky portion at the top of the style which traps pollen
anabolism
ribosomes
haploid
stigma
43. Change in a DNA sequence that affects genetic information
stroma
mutation
substrate
shoot apex
44. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
crossing over
transduction
active transport
chromatin
45. Proteins that act as biological catalysts
enzymes
DNA
gametes
electron transport
46. Body of a chloroplast containing grana
prosthetic group
ovary
prophase
stroma
47. Modification of a cell by the incorporation of exogenous DNA
tonoplast
transformation
stamen
vascular plants
48. Uses electrons from the Krebs cycle to change ADP to ATP (cytochromes on surface of cristae of mitochondria - contain protein and heme (iron containing) groups - electrons pass along them and ATP is produced)
electron transport
catabolism
cell cycle
mutation
49. Projections on cell membrane increase surface area
microvilli
chlorophyll
diploid
metaphase
50. Cells that lack a membrane-bound nucleus and membrane-bound organelles
nuclear pores
prokaryotes
photolysis
angiosperms