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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. Small - dense region within most nuclei in which the assembly of RNA proteins begins
nucleolus
vascular plants
prokaryotes
ovary
2. The stalk of a stamen that supports the anther
filament
anther
genome
chromatin
3. Sticky portion at the top of the style which traps pollen
stigma
interphase
carbon dioxide fixation
enzymes
4. Smallest unit of most living things
anabolism
codon
tonoplast
cell
5. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
endosymbiont hypothesis
eukoryotic cells
ovules
shoot apex
6. Classification of plant whose life cycle survives two seasons
biennial
metaphase
stigma
DNA
7. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
nucleosome
fermentation
pedicel
endocytic vesicles
8. Matching Chromosomes that are similar but not identical
homologs
prophase
nucleolus
gametes
9. Two identical chromosomes that split and contain the same genetic material
chromatids
telophase
gene
photolysis
10. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
prosthetic group
endocytic vesicles
metabolism
substrate
11. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metaphase
exocytosis
prokaryotes
pedicel
12. Change in a DNA sequence that affects genetic information
interphase
reduction
mutation
electron transport
13. An internal membrane system in which components of cell membrane and some proteins are constructed. rough - instrumental in protein synthesis; smooth - processes lipids fats and steroids
cell wall
endoplasmic reticulum
ATP
ovules
14. Stores - packages and ships proteins
secretory vesicles
golgi apparatus
microvilli
stigma
15. Process by which a cell releases large amounts of material
vascular plants
prosthetic group
exocytosis
haploid
16. Plants that grow year after year
perennial
pedicel
nucleolus
stigma
17. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
interphase
meiosis
stigma
18. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
eukoryotic cells
inhibitor
annuals
19. The organic process whereby the DNA sequence in a gene is copied into mRNA
pedicel
ATP
stamen
transcription
20. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
cell
prophase
ribosomes
telophase
21. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
ovules
cofactor
prosthetic group
anaphase
22. Consists of DNA tightly coiled around proteins
endocytic vesicles
chromatin
chlorophyll
prokaryotes
23. 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)
ATP
homologs
organism
electron transport
24. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
microtubules
eukoryotic cells
perennial
25. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
translation
stigma
microfilaments
centrioles
26. Living thing
telophase
ribosomes
chromatids
organism
27. In photosynthesis - this is the splitting of water by light
organism
codon
secretory vesicles
photolysis
28. Cell division which produces two identical cells
nucleolus
cytokinesis
mitosis
translation
29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
anther
nucleolus
enzymes
interphase
30. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
angiosperms
electron transport
chromatids
reduction
31. Transport of a substance across a cell membrane against the concentration gradient
meiosis
cytoskeleton
transduction
active transport
32. Cells that lack a membrane-bound nucleus and membrane-bound organelles
krebs cycle
meiosis
prokaryotes
cytokinesis
33. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
pedicel
metabolism
secretory vesicles
metaphase
34. Green pigment contained in the grana
cell cycle
prokaryotes
telophase
chlorophyll
35. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
annuals
cell wall
nucleosome
diploid
36. The part of the stamen that contains pollen
centromere
shoot apex
anther
grana
37. Used to examine tiny cell organelles
electron microscope
ribosomes
cristae
haploid
38. Pores which allows materials to move in and out of the cell nucleus
interphase
fermentation
nuclear pores
krebs cycle
39. Modification of a cell by the incorporation of exogenous DNA
glycolysis
diploid
annuals
transformation
40. Structure within ovary of plant that contains egg cells
ovules
shoot apex
interphase
ribosomes
41. Vacuole membrane
endosymbiont hypothesis
alleles
glycolysis
tonoplast
42. Composed of a bilayer of lipids embedded with globular proteins
transduction
cell membrane
cell
prosthetic group
43. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
glycolysis
genome
ovules
cell cycle
44. The process of transfering genetic material from one cell to another
transduction
grana
telophase
gene
45. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
secretory vesicles
post-transcriptional processing
krebs cycle
cytoskeleton
46. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
endosymbiont hypothesis
microfilaments
virus
centromere
47. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
organelles
fermentation
cofactor
telophase
48. (adenosine triphosphate) main energy source that cells use for most of their work
perennial
photolysis
electron transport
ATP
49. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
diploid
cytoskeleton
nuclear pores
50. The part of an enzyme where the chemical reaction occurs
reduction
cell wall
active site
haploid