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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. Used to examine tiny cell organelles
vascular plants
gametes
electron microscope
cytokinesis
2. The part of an enzyme where the chemical reaction occurs
active site
photolysis
electron microscope
prokaryotes
3. Proteins that act as biological catalysts
gametes
enzymes
gymnosperms
mitosis
4. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
catabolism
grana
virus
microtubules
5. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
gene
chlorophyll
stamen
post-transcriptional processing
6. Projections on cell membrane increase surface area
metaphase
microvilli
prokaryotes
inhibitor
7. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
electron transport
endosymbiont hypothesis
prosthetic group
mitochondria
8. The process of transfering genetic material from one cell to another
transformation
transduction
prokaryotes
biosynthesis
9. The second phase of mitosis - during which the chromosomes line up across the center of the cell
prokaryotes
gymnosperms
metaphase
meiosis
10. Stalk that supports the flower
glycolysis
pistil
pedicel
active transport
11. Classification of plant whose life cycle survives two seasons
biennial
nucleosome
microfilaments
gymnosperms
12. Change in a DNA sequence that affects genetic information
mutation
telophase
gene
enzymes
13. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
haploid
crossing over
krebs cycle
interphase
14. Process by which a cell releases large amounts of material
exocytosis
vacuole
prokaryotes
prosthetic group
15. Reproductive cells - have only half the number of chromosomes
gametes
prosthetic group
electron transport
prophase
16. Different forms of a gene
active transport
anaphase
homologs
alleles
17. Structure within ovary of plant that contains egg cells
tonoplast
ovules
crossing over
ATP
18. Pores which allows materials to move in and out of the cell nucleus
nuclear pores
pedicel
centromere
endosymbiont hypothesis
19. The part of the stamen that contains pollen
cristae
anther
active transport
stamen
20. In photosynthesis - this is the splitting of water by light
DNA
crossing over
photolysis
endocytic vesicles
21. Classification of plant which survives only a single season
transformation
organism
tonoplast
annuals
22. Living thing
organism
ovules
annuals
prophase
23. Cells that lack a membrane-bound nucleus and membrane-bound organelles
cofactor
lysosomes
ATP
prokaryotes
24. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
mutation
facilitated diffusion
pedicel
cell cycle
25. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
genome
stigma
reduction
26. Two identical chromosomes that split and contain the same genetic material
homologs
pedicel
cristae
chromatids
27. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
prosthetic group
vascular plants
DNA
28. Stores - packages and ships proteins
vacuole
endoplasmic reticulum
golgi apparatus
endosymbiont hypothesis
29. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
exocytosis
ribosomes
DNA
metabolism
30. Classication of plant which produce seeds which are 'naked' (in cones)
ribosomes
angiosperms
genome
gymnosperms
31. Process of building up complex materials (proteins) from simple materials
anabolism
photolysis
ATP
microvilli
32. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
DNA
chromatin
ovary
inhibitor
33. Modification of a cell by the incorporation of exogenous DNA
virus
cell wall
transformation
transduction
34. Matching Chromosomes that are similar but not identical
tonoplast
homologs
anther
catabolism
35. Small - dense region within most nuclei in which the assembly of RNA proteins begins
biennial
active transport
homologs
nucleolus
36. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
stroma
glycolysis
mutation
inhibitor
37. Sequence of DNA that codes for a protein and thus determines a trait
pedicel
electron microscope
cristae
gene
38. The male reproductive organ of a flower consisting of anther - filament - and pollen
stamen
ovules
tonoplast
fermentation
39. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
anaphase
transduction
cell membrane
angiosperms
40. Has a nucleus - has organelles or other cell parts
vascular plants
carbon dioxide fixation
eukoryotic cells
microtubules
41. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
nucleosome
anaphase
carbon dioxide fixation
vacuole
42. Division of the cytoplasm during cell division - new cell is formed
metabolism
cytokinesis
crossing over
grana
43. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
prophase
ovary
anaphase
ATP
44. Small structures in the cytoplasm of a cell that do special jobs
organelles
stroma
mitochondria
haploid
45. Cell division which produces two identical cells
ovary
pistil
mitosis
microfilaments
46. 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
ovary
endoplasmic reticulum
ovules
prokaryotes
47. A cell having only one complete set of chromosomes
gametes
nuclear pores
haploid
cell membrane
48. 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)
chlorophyll
lysosomes
microvilli
electron transport
49. (adenosine triphosphate) main energy source that cells use for most of their work
krebs cycle
ATP
gene
exocytosis
50. Transport of a substance across a cell membrane against the concentration gradient
interphase
post-transcriptional processing
active transport
DNA