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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. Double-stranded chains of proteins which give structure to the cell
prokaryotes
organism
endocytic vesicles
microfilaments
2. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
grana
microtubules
virus
homologs
3. Matching Chromosomes that are similar but not identical
vascular plants
exocytosis
carbon dioxide fixation
homologs
4. A cell having two sets of chromosomes or twice the haploid number
diploid
endosymbiont hypothesis
cell cycle
vacuole
5. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
catabolism
angiosperms
active site
cell membrane
6. Sequence of DNA that codes for a protein and thus determines a trait
metabolism
electron microscope
active transport
gene
7. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
prokaryotes
nucleolus
haploid
8. Sticky portion at the top of the style which traps pollen
ATP
lysosomes
stigma
post-transcriptional processing
9. Pores which allows materials to move in and out of the cell nucleus
centrioles
nuclear pores
microfilaments
pedicel
10. 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
endoplasmic reticulum
vascular plants
biosynthesis
transduction
11. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
meiosis
facilitated diffusion
cristae
prokaryotes
12. Used to examine tiny cell organelles
electron microscope
organelles
gametes
meiosis
13. Body of a chloroplast containing grana
stigma
haploid
catabolism
stroma
14. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
telophase
substrate
active transport
virus
15. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
microfilaments
stamen
anaphase
genome
16. A substance that retards or stops enzymatic activity
nucleolus
chromatids
inhibitor
diploid
17. The regular sequence of growth and division that cells undergo
cell cycle
mitochondria
cell
reduction
18. The part of an enzyme where the chemical reaction occurs
transformation
tonoplast
active site
genome
19. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
carbon dioxide fixation
active transport
codon
ATP
20. Small - dense region within most nuclei in which the assembly of RNA proteins begins
photolysis
biennial
nucleolus
metabolism
21. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
exocytosis
lysosomes
mitochondria
glycolysis
22. (adenosine triphosphate) main energy source that cells use for most of their work
centromere
stigma
ATP
cytoskeleton
23. Division of the cytoplasm during cell division - new cell is formed
organism
cytokinesis
cell
prokaryotes
24. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
translation
secretory vesicles
endoplasmic reticulum
mitochondria
25. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
virus
transformation
cell
nucleosome
26. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
reduction
ribosomes
codon
gymnosperms
27. Production of a chemical compound by a living organism
chlorophyll
cytokinesis
biosynthesis
vacuole
28. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
ATP
crossing over
biennial
genome
29. Living thing
golgi apparatus
cofactor
organism
diploid
30. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
cytoskeleton
telophase
endosymbiont hypothesis
centromere
31. Cell division which produces two identical cells
mitosis
microvilli
haploid
translation
32. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
cell membrane
gymnosperms
prokaryotes
33. Structure within ovary of plant that contains egg cells
meiosis
angiosperms
ovules
active transport
34. Membrane-bound organelle that stores water and soluble substances
biennial
stigma
microvilli
vacuole
35. The first stage of mitosis - forming spindle fibres attached to the centromere
ATP
stroma
facilitated diffusion
prophase
36. The stalk of a stamen that supports the anther
angiosperms
filament
golgi apparatus
electron microscope
37. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
endocytic vesicles
carbon dioxide fixation
pistil
microtubules
38. Powerhouse of the cell - organelle that is the site of ATP (energy) production
mitochondria
metaphase
prophase
biosynthesis
39. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
tonoplast
nucleosome
nucleolus
40. Small structures in the cytoplasm of a cell that do special jobs
haploid
angiosperms
prokaryotes
organelles
41. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
mutation
gymnosperms
endosymbiont hypothesis
shoot apex
42. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
gene
organelles
pistil
43. Transport of a substance across a cell membrane against the concentration gradient
gene
mutation
chromatids
active transport
44. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
cristae
carbon dioxide fixation
organism
45. Formed when cell membrane surrounds a molecule outside the cell and ingests it
nucleosome
facilitated diffusion
endocytic vesicles
ovary
46. Has a nucleus - has organelles or other cell parts
metaphase
cell
eukoryotic cells
electron transport
47. Area where the chromatids of a chromosome are attached
electron microscope
cell membrane
biosynthesis
centromere
48. Modification of a cell by the incorporation of exogenous DNA
substrate
gymnosperms
transformation
shoot apex
49. The female part of a flower composed of ovary and style and stigma and ovules
nucleosome
pistil
gymnosperms
prophase
50. Proteins that act as biological catalysts
cofactor
enzymes
haploid
ATP