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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. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
prosthetic group
shoot apex
haploid
telophase
2. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
substrate
genome
crossing over
transduction
3. Area where the chromatids of a chromosome are attached
endoplasmic reticulum
centromere
crossing over
alleles
4. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
endosymbiont hypothesis
angiosperms
microtubules
mutation
5. Transport of a substance across a cell membrane against the concentration gradient
glycolysis
active transport
metabolism
exocytosis
6. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
chlorophyll
nuclear pores
eukoryotic cells
7. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
glycolysis
carbon dioxide fixation
gymnosperms
prophase
8. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
microfilaments
metabolism
krebs cycle
9. Has a nucleus - has organelles or other cell parts
cytokinesis
eukoryotic cells
nuclear pores
microtubules
10. Cell division which produces two identical cells
anabolism
mitosis
tonoplast
anaphase
11. A substance that retards or stops enzymatic activity
inhibitor
transcription
gametes
chromatids
12. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
gene
haploid
reduction
stigma
13. Classification of plant which survives only a single season
facilitated diffusion
endosymbiont hypothesis
annuals
cell cycle
14. Reproductive cells - have only half the number of chromosomes
cell
stigma
electron microscope
gametes
15. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
haploid
metabolism
centrioles
vascular plants
16. Plants that grow year after year
grana
perennial
endocytic vesicles
nuclear pores
17. Matching Chromosomes that are similar but not identical
codon
homologs
mitosis
biennial
18. Membrane-bound organelle that stores water and soluble substances
mutation
vacuole
photolysis
microtubules
19. A cell having two sets of chromosomes or twice the haploid number
diploid
chromatids
microfilaments
cell
20. Body of a chloroplast containing grana
electron microscope
stroma
gametes
cofactor
21. The female part of a flower composed of ovary and style and stigma and ovules
anabolism
centromere
pistil
post-transcriptional processing
22. Sticky portion at the top of the style which traps pollen
microfilaments
centromere
photolysis
stigma
23. Proteins that act as biological catalysts
mitosis
prosthetic group
enzymes
secretory vesicles
24. A cell having only one complete set of chromosomes
endoplasmic reticulum
haploid
pedicel
stroma
25. Smallest unit of most living things
cell
eukoryotic cells
active transport
codon
26. Classification of plant whose life cycle survives two seasons
biennial
homologs
chromatin
carbon dioxide fixation
27. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
shoot apex
cell wall
microfilaments
28. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
anther
translation
glycolysis
29. Used to examine tiny cell organelles
genome
mitochondria
electron microscope
lysosomes
30. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
DNA
shoot apex
interphase
secretory vesicles
31. Two identical chromosomes that split and contain the same genetic material
chromatids
centrioles
codon
mitosis
32. Formed when cell membrane surrounds a molecule outside the cell and ingests it
codon
endocytic vesicles
post-transcriptional processing
virus
33. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
annuals
secretory vesicles
enzymes
34. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
metabolism
enzymes
ovary
facilitated diffusion
35. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
centrioles
substrate
codon
nucleosome
36. A substance that must join with the enzyme to enable it to fit the substrate
cell cycle
catabolism
cofactor
DNA
37. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
active site
endosymbiont hypothesis
substrate
metabolism
38. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
transformation
gene
microvilli
39. Small - dense region within most nuclei in which the assembly of RNA proteins begins
nucleolus
endocytic vesicles
fermentation
anaphase
40. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
transformation
organelles
genome
prosthetic group
41. 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
crossing over
biosynthesis
endoplasmic reticulum
enzymes
42. The organ that bears the ovules of a flower - base of the pistil
pedicel
cristae
ovary
krebs cycle
43. The part of an enzyme where the chemical reaction occurs
endosymbiont hypothesis
chromatin
active site
microvilli
44. 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)
stroma
stamen
electron transport
eukoryotic cells
45. Stores - packages and ships proteins
centrioles
transformation
exocytosis
golgi apparatus
46. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
nuclear pores
golgi apparatus
krebs cycle
ATP
47. (adenosine triphosphate) main energy source that cells use for most of their work
alleles
ATP
codon
electron microscope
48. Powerhouse of the cell - organelle that is the site of ATP (energy) production
mitochondria
stamen
alleles
facilitated diffusion
49. Vacuole membrane
electron transport
tonoplast
substrate
virus
50. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
stigma
vacuole
interphase
shoot apex