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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. Modification of a cell by the incorporation of exogenous DNA
transformation
anabolism
active site
homologs
2. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
haploid
anabolism
shoot apex
alleles
3. Double-stranded chains of proteins which give structure to the cell
chromatin
transcription
chromatids
microfilaments
4. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
angiosperms
golgi apparatus
vacuole
stigma
5. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
diploid
transduction
chromatids
DNA
6. Powerhouse of the cell - organelle that is the site of ATP (energy) production
chlorophyll
gymnosperms
endoplasmic reticulum
mitochondria
7. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
facilitated diffusion
crossing over
centrioles
chlorophyll
8. The second phase of mitosis - during which the chromosomes line up across the center of the cell
enzymes
cell wall
filament
metaphase
9. Projections on cell membrane increase surface area
microvilli
electron microscope
catabolism
stamen
10. The substance acted upon by an enzyme
substrate
organelles
transcription
chromatin
11. The female part of a flower composed of ovary and style and stigma and ovules
electron transport
pistil
electron microscope
diploid
12. Process by which a cell releases large amounts of material
transcription
nucleolus
eukoryotic cells
exocytosis
13. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
interphase
catabolism
gametes
codon
14. Area where the chromatids of a chromosome are attached
microvilli
centromere
metaphase
annuals
15. Classification of plant whose life cycle survives two seasons
transformation
biennial
prokaryotes
lysosomes
16. Reproductive cells - have only half the number of chromosomes
electron transport
telophase
cell membrane
gametes
17. Production of a chemical compound by a living organism
annuals
biosynthesis
vacuole
cell wall
18. Breakdown of more complex substances into simpler ones with release of energy
annuals
cytokinesis
transcription
catabolism
19. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
ribosomes
organelles
anaphase
meiosis
20. Have tissues made of cells that transport water and nutrients throughout the plant
stamen
metaphase
vascular plants
microvilli
21. Consists of DNA tightly coiled around proteins
glycolysis
chromatin
electron transport
gymnosperms
22. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
crossing over
eukoryotic cells
mitochondria
microfilaments
23. 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
anaphase
endoplasmic reticulum
endocytic vesicles
prophase
24. Cell division which produces two identical cells
mutation
inhibitor
mitosis
microtubules
25. (adenosine triphosphate) main energy source that cells use for most of their work
virus
krebs cycle
grana
ATP
26. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
prosthetic group
transformation
ribosomes
exocytosis
27. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
nucleosome
crossing over
pedicel
cell wall
28. Body of a chloroplast containing grana
electron microscope
catabolism
stroma
alleles
29. The process of transfering genetic material from one cell to another
interphase
cytoskeleton
gene
transduction
30. Proteins that act as biological catalysts
interphase
enzymes
cytokinesis
microvilli
31. Change in a DNA sequence that affects genetic information
nucleolus
endoplasmic reticulum
telophase
mutation
32. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
facilitated diffusion
centromere
reduction
krebs cycle
33. Structure within ovary of plant that contains egg cells
lysosomes
prokaryotes
ovules
post-transcriptional processing
34. The organ that bears the ovules of a flower - base of the pistil
electron microscope
transcription
stamen
ovary
35. Sequence of DNA that codes for a protein and thus determines a trait
cell wall
gene
endoplasmic reticulum
endocytic vesicles
36. Cells that lack a membrane-bound nucleus and membrane-bound organelles
endocytic vesicles
prokaryotes
carbon dioxide fixation
virus
37. Different forms of a gene
secretory vesicles
prokaryotes
enzymes
alleles
38. A cell having only one complete set of chromosomes
haploid
cristae
alleles
substrate
39. Smallest unit of most living things
gymnosperms
cell
electron transport
centrioles
40. Cell division that produces reproductive cells in sexually reproducing organisms
transformation
meiosis
krebs cycle
centrioles
41. The regular sequence of growth and division that cells undergo
grana
ribosomes
cell cycle
organism
42. Vacuole membrane
nuclear pores
diploid
tonoplast
transformation
43. 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
endoplasmic reticulum
electron microscope
44. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microvilli
microtubules
shoot apex
metabolism
45. Has a nucleus - has organelles or other cell parts
anabolism
stroma
eukoryotic cells
endosymbiont hypothesis
46. Membrane-bound organelle that stores water and soluble substances
chlorophyll
vacuole
pistil
anther
47. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
translation
cell membrane
cofactor
48. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
vascular plants
nucleosome
active site
chromatin
49. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
organelles
homologs
nucleosome
50. The stalk of a stamen that supports the anther
homologs
transcription
ovules
filament