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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. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
nucleosome
anther
enzymes
2. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
meiosis
genome
interphase
prosthetic group
3. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
telophase
nucleolus
fermentation
stroma
4. The stalk of a stamen that supports the anther
inhibitor
filament
secretory vesicles
stroma
5. Composed of a bilayer of lipids embedded with globular proteins
annuals
cell membrane
mutation
substrate
6. (adenosine triphosphate) main energy source that cells use for most of their work
crossing over
ATP
pistil
cell
7. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
gametes
translation
prokaryotes
interphase
8. Two identical chromosomes that split and contain the same genetic material
microfilaments
chromatids
DNA
electron transport
9. The organ that bears the ovules of a flower - base of the pistil
stamen
diploid
ovary
vascular plants
10. Structure within ovary of plant that contains egg cells
prosthetic group
DNA
ovules
biennial
11. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
ATP
nucleosome
post-transcriptional processing
metaphase
12. Breakdown of more complex substances into simpler ones with release of energy
prosthetic group
stroma
catabolism
ribosomes
13. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
metaphase
electron transport
shoot apex
14. In photosynthesis - this is the splitting of water by light
nucleolus
photolysis
post-transcriptional processing
enzymes
15. Small structures in the cytoplasm of a cell that do special jobs
cell wall
endosymbiont hypothesis
organelles
endoplasmic reticulum
16. Small - dense region within most nuclei in which the assembly of RNA proteins begins
mitochondria
nucleolus
organelles
stroma
17. The regular sequence of growth and division that cells undergo
anther
chromatin
transformation
cell cycle
18. Process by which a cell releases large amounts of material
centrioles
exocytosis
photolysis
virus
19. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
stigma
nuclear pores
inhibitor
20. Smallest unit of most living things
cell
inhibitor
telophase
electron transport
21. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
chromatin
anaphase
mutation
glycolysis
22. The male reproductive organ of a flower consisting of anther - filament - and pollen
biosynthesis
stroma
stamen
prosthetic group
23. A cell having two sets of chromosomes or twice the haploid number
catabolism
stamen
diploid
cytoskeleton
24. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
post-transcriptional processing
centromere
grana
25. The first stage of mitosis - forming spindle fibres attached to the centromere
metabolism
prophase
electron transport
ovules
26. Pores which allows materials to move in and out of the cell nucleus
nucleolus
nuclear pores
endocytic vesicles
mitosis
27. Living thing
mitochondria
nuclear pores
centromere
organism
28. Cell division which produces two identical cells
ATP
mitosis
vascular plants
enzymes
29. Reproductive cells - have only half the number of chromosomes
glycolysis
microvilli
exocytosis
gametes
30. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
nucleolus
DNA
organism
electron transport
31. Modification of a cell by the incorporation of exogenous DNA
transformation
DNA
anabolism
diploid
32. A substance that retards or stops enzymatic activity
inhibitor
alleles
pistil
nucleosome
33. Production of a chemical compound by a living organism
microvilli
prokaryotes
biosynthesis
inhibitor
34. Area where the chromatids of a chromosome are attached
cell
chromatin
metaphase
centromere
35. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
cofactor
genome
nucleosome
crossing over
36. Has a nucleus - has organelles or other cell parts
nuclear pores
eukoryotic cells
crossing over
microvilli
37. The female part of a flower composed of ovary and style and stigma and ovules
pistil
substrate
metabolism
prosthetic group
38. 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
tonoplast
mutation
endoplasmic reticulum
chlorophyll
39. Membrane-bound organelle that stores water and soluble substances
annuals
cristae
reduction
vacuole
40. Sticky portion at the top of the style which traps pollen
crossing over
mitochondria
stigma
anaphase
41. Vacuole membrane
substrate
tonoplast
cell wall
microvilli
42. Classification of plant whose life cycle survives two seasons
mitosis
metabolism
filament
biennial
43. Cell organelle filled with enyzmes need to break down certain materials in the cells
active site
stroma
DNA
lysosomes
44. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
krebs cycle
ovary
substrate
secretory vesicles
45. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metaphase
mitosis
cristae
perennial
46. The process of transfering genetic material from one cell to another
transduction
organelles
homologs
organism
47. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
endosymbiont hypothesis
golgi apparatus
cristae
stamen
48. Process of building up complex materials (proteins) from simple materials
anabolism
metaphase
cell membrane
ovary
49. Used to examine tiny cell organelles
gymnosperms
alleles
cell cycle
electron microscope
50. Classification of plant which survives only a single season
mitochondria
metaphase
annuals
perennial