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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. Composed of a bilayer of lipids embedded with globular proteins
cell wall
krebs cycle
cell membrane
chromatin
2. Used to examine tiny cell organelles
electron microscope
nuclear pores
virus
carbon dioxide fixation
3. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
vascular plants
anaphase
interphase
tonoplast
4. Proteins that act as biological catalysts
cell membrane
endoplasmic reticulum
enzymes
nucleosome
5. Sticky portion at the top of the style which traps pollen
angiosperms
stigma
substrate
biennial
6. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
active transport
cell wall
mitosis
7. Breakdown of more complex substances into simpler ones with release of energy
vacuole
cytokinesis
catabolism
electron transport
8. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
transduction
reduction
cristae
9. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
substrate
angiosperms
prophase
prosthetic group
10. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
ribosomes
grana
krebs cycle
crossing over
11. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
cytoskeleton
glycolysis
microfilaments
endoplasmic reticulum
12. Have tissues made of cells that transport water and nutrients throughout the plant
cristae
vascular plants
mutation
nucleolus
13. Process by which a cell releases large amounts of material
exocytosis
anther
transduction
stroma
14. Division of the cytoplasm during cell division - new cell is formed
crossing over
microtubules
nuclear pores
cytokinesis
15. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
cell wall
translation
endosymbiont hypothesis
microtubules
16. A substance that retards or stops enzymatic activity
inhibitor
cell wall
diploid
centromere
17. Cell division that produces reproductive cells in sexually reproducing organisms
ATP
meiosis
glycolysis
interphase
18. Modification of a cell by the incorporation of exogenous DNA
biosynthesis
alleles
transformation
lysosomes
19. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
microvilli
nucleosome
prophase
endosymbiont hypothesis
20. 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
meiosis
cristae
inhibitor
endoplasmic reticulum
21. Area where the chromatids of a chromosome are attached
prophase
telophase
prosthetic group
centromere
22. The first stage of mitosis - forming spindle fibres attached to the centromere
catabolism
ovules
prophase
substrate
23. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
prophase
prosthetic group
telophase
biennial
24. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
nucleosome
reduction
photolysis
25. Has a nucleus - has organelles or other cell parts
anaphase
photolysis
stroma
eukoryotic cells
26. Transport of a substance across a cell membrane against the concentration gradient
reduction
grana
haploid
active transport
27. The stalk of a stamen that supports the anther
filament
nucleolus
haploid
substrate
28. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
prosthetic group
cell wall
interphase
crossing over
29. Cells that lack a membrane-bound nucleus and membrane-bound organelles
prokaryotes
anabolism
post-transcriptional processing
haploid
30. Classification of plant whose life cycle survives two seasons
vascular plants
annuals
nucleolus
biennial
31. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
mutation
fermentation
active site
32. (adenosine triphosphate) main energy source that cells use for most of their work
stigma
cell
endosymbiont hypothesis
ATP
33. A substance that must join with the enzyme to enable it to fit the substrate
tonoplast
diploid
cofactor
post-transcriptional processing
34. Membrane-bound organelle that stores water and soluble substances
active site
microtubules
vacuole
biennial
35. The organic process whereby the DNA sequence in a gene is copied into mRNA
transcription
catabolism
krebs cycle
electron transport
36. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
interphase
electron microscope
vacuole
37. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
alleles
virus
diploid
microtubules
38. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
electron transport
crossing over
nucleosome
glycolysis
39. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
telophase
stigma
centrioles
prokaryotes
40. Stalk that supports the flower
enzymes
pedicel
biennial
endoplasmic reticulum
41. A cell having only one complete set of chromosomes
facilitated diffusion
haploid
prosthetic group
nuclear pores
42. Cell organelle filled with enyzmes need to break down certain materials in the cells
substrate
krebs cycle
pedicel
lysosomes
43. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
metaphase
cristae
interphase
microtubules
44. The female part of a flower composed of ovary and style and stigma and ovules
active transport
stigma
pistil
endocytic vesicles
45. Matching Chromosomes that are similar but not identical
stigma
homologs
interphase
reduction
46. Body of a chloroplast containing grana
ATP
shoot apex
stroma
translation
47. Small - dense region within most nuclei in which the assembly of RNA proteins begins
nucleolus
inhibitor
reduction
crossing over
48. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
fermentation
crossing over
eukoryotic cells
translation
49. Pores which allows materials to move in and out of the cell nucleus
prokaryotes
cristae
nuclear pores
cell cycle
50. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
endosymbiont hypothesis
codon
meiosis
fermentation