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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. Smallest unit of most living things
cell
DNA
golgi apparatus
post-transcriptional processing
2. Formed when cell membrane surrounds a molecule outside the cell and ingests it
haploid
chromatin
nuclear pores
endocytic vesicles
3. 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)
gametes
grana
mitosis
electron transport
4. Double-stranded chains of proteins which give structure to the cell
secretory vesicles
microfilaments
krebs cycle
gene
5. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
cell membrane
meiosis
chromatin
carbon dioxide fixation
6. Plants that grow year after year
carbon dioxide fixation
catabolism
prosthetic group
perennial
7. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
biennial
anaphase
ovules
vascular plants
8. Has a nucleus - has organelles or other cell parts
gymnosperms
transformation
crossing over
eukoryotic cells
9. The second phase of mitosis - during which the chromosomes line up across the center of the cell
DNA
metaphase
ovary
electron microscope
10. Stalk that supports the flower
haploid
enzymes
pedicel
centromere
11. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
chromatin
endosymbiont hypothesis
pistil
telophase
12. Powerhouse of the cell - organelle that is the site of ATP (energy) production
centrioles
photolysis
mitochondria
alleles
13. The first stage of mitosis - forming spindle fibres attached to the centromere
gymnosperms
prophase
endoplasmic reticulum
metaphase
14. The part of the stamen that contains pollen
crossing over
transcription
anther
inhibitor
15. The organ that bears the ovules of a flower - base of the pistil
stigma
ovary
photolysis
metaphase
16. Cell division which produces two identical cells
mitosis
biosynthesis
codon
shoot apex
17. Body of a chloroplast containing grana
stroma
interphase
shoot apex
electron transport
18. A cell having only one complete set of chromosomes
enzymes
haploid
crossing over
vacuole
19. The stalk of a stamen that supports the anther
nucleosome
electron transport
filament
substrate
20. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
anther
metabolism
cofactor
electron microscope
21. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
metaphase
microtubules
ovary
22. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
electron microscope
haploid
tonoplast
23. Reproductive cells - have only half the number of chromosomes
stigma
cell wall
gametes
transduction
24. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
DNA
photolysis
carbon dioxide fixation
cell cycle
25. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
interphase
cristae
active site
nucleosome
26. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
active transport
nucleosome
ribosomes
substrate
27. The female part of a flower composed of ovary and style and stigma and ovules
mutation
mitochondria
annuals
pistil
28. Division of the cytoplasm during cell division - new cell is formed
alleles
angiosperms
cytokinesis
secretory vesicles
29. Process of building up complex materials (proteins) from simple materials
diploid
anabolism
biosynthesis
stamen
30. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
facilitated diffusion
reduction
microfilaments
electron microscope
31. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
chromatin
prosthetic group
golgi apparatus
biennial
32. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
biennial
prophase
chromatids
33. The part of an enzyme where the chemical reaction occurs
homologs
gene
chlorophyll
active site
34. Area where the chromatids of a chromosome are attached
substrate
centromere
nuclear pores
metaphase
35. Pores which allows materials to move in and out of the cell nucleus
photolysis
prokaryotes
nuclear pores
centrioles
36. Change in a DNA sequence that affects genetic information
translation
pedicel
homologs
mutation
37. Classication of plant which produce seeds which are 'naked' (in cones)
cofactor
cell membrane
ovules
gymnosperms
38. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
centromere
cristae
nucleosome
endoplasmic reticulum
39. The regular sequence of growth and division that cells undergo
cell cycle
vacuole
gymnosperms
alleles
40. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
diploid
meiosis
cytoskeleton
annuals
41. Living thing
cell cycle
transformation
organism
active site
42. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
post-transcriptional processing
haploid
cell
metaphase
43. Classification of plant whose life cycle survives two seasons
biennial
anther
lysosomes
stroma
44. Stores - packages and ships proteins
prokaryotes
nucleolus
golgi apparatus
stigma
45. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
glycolysis
translation
transduction
46. Disk-like plates which are the site of photosynthesis in chloroplasts
interphase
annuals
ATP
grana
47. Projections on cell membrane increase surface area
ATP
microvilli
facilitated diffusion
photolysis
48. The male reproductive organ of a flower consisting of anther - filament - and pollen
shoot apex
stamen
filament
angiosperms
49. The complete genetic material contained in an individual
enzymes
perennial
genome
cell
50. Have tissues made of cells that transport water and nutrients throughout the plant
exocytosis
vascular plants
microfilaments
eukoryotic cells