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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. Consists of DNA tightly coiled around proteins
chromatin
cell wall
anabolism
gene
2. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
filament
glycolysis
nucleosome
translation
3. Area where the chromatids of a chromosome are attached
centromere
fermentation
annuals
lysosomes
4. Cell division which produces two identical cells
shoot apex
mitosis
metaphase
anaphase
5. The organic process whereby the DNA sequence in a gene is copied into mRNA
enzymes
nucleolus
transcription
carbon dioxide fixation
6. The male reproductive organ of a flower consisting of anther - filament - and pollen
lysosomes
vascular plants
stamen
ovules
7. Reproductive cells - have only half the number of chromosomes
metaphase
gametes
pistil
facilitated diffusion
8. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
gametes
catabolism
grana
angiosperms
9. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
pedicel
metabolism
nuclear pores
cell membrane
10. The part of an enzyme where the chemical reaction occurs
secretory vesicles
interphase
active site
transduction
11. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
cytoskeleton
cell cycle
gymnosperms
genome
12. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
centromere
pedicel
shoot apex
endosymbiont hypothesis
13. The female part of a flower composed of ovary and style and stigma and ovules
pistil
gametes
mitosis
virus
14. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
endoplasmic reticulum
anabolism
stamen
15. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cytokinesis
cell wall
post-transcriptional processing
facilitated diffusion
16. Used to examine tiny cell organelles
electron microscope
virus
transcription
lysosomes
17. Membrane-bound organelle that stores water and soluble substances
organism
virus
vacuole
endocytic vesicles
18. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
stigma
facilitated diffusion
vascular plants
nucleolus
19. Breakdown of more complex substances into simpler ones with release of energy
catabolism
vascular plants
microtubules
enzymes
20. Sequence of DNA that codes for a protein and thus determines a trait
transcription
homologs
mitochondria
gene
21. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
meiosis
inhibitor
cell membrane
ribosomes
22. The substance acted upon by an enzyme
mitosis
substrate
diploid
perennial
23. Process of building up complex materials (proteins) from simple materials
haploid
krebs cycle
anabolism
virus
24. Composed of a bilayer of lipids embedded with globular proteins
nucleosome
gene
pedicel
cell membrane
25. Classification of plant whose life cycle survives two seasons
chlorophyll
nuclear pores
gene
biennial
26. (adenosine triphosphate) main energy source that cells use for most of their work
post-transcriptional processing
transformation
ATP
DNA
27. A cell having only one complete set of chromosomes
vascular plants
carbon dioxide fixation
haploid
lysosomes
28. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
nucleolus
shoot apex
tonoplast
gymnosperms
29. Transport of a substance across a cell membrane against the concentration gradient
stamen
filament
enzymes
active transport
30. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metaphase
microvilli
telophase
transformation
31. Different forms of a gene
alleles
electron microscope
cofactor
angiosperms
32. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
mitochondria
codon
enzymes
anaphase
33. Body of a chloroplast containing grana
stigma
angiosperms
stroma
vascular plants
34. Powerhouse of the cell - organelle that is the site of ATP (energy) production
mitochondria
microtubules
cofactor
cell
35. The part of the stamen that contains pollen
catabolism
anther
anaphase
lysosomes
36. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
nucleosome
prokaryotes
alleles
transduction
37. In photosynthesis - this is the splitting of water by light
organelles
enzymes
gymnosperms
photolysis
38. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
reduction
post-transcriptional processing
ATP
homologs
39. Stalk that supports the flower
exocytosis
organelles
microfilaments
pedicel
40. Cell organelle filled with enyzmes need to break down certain materials in the cells
biennial
lysosomes
genome
pistil
41. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
stamen
substrate
carbon dioxide fixation
vacuole
42. Sticky portion at the top of the style which traps pollen
cristae
stigma
active transport
prophase
43. Disk-like plates which are the site of photosynthesis in chloroplasts
genome
grana
gymnosperms
chromatin
44. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
prosthetic group
organism
gametes
ATP
45. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
alleles
exocytosis
microvilli
46. Double-stranded chains of proteins which give structure to the cell
microfilaments
DNA
carbon dioxide fixation
cytoskeleton
47. The first stage of mitosis - forming spindle fibres attached to the centromere
prophase
exocytosis
biennial
meiosis
48. Production of a chemical compound by a living organism
biosynthesis
stroma
mitochondria
carbon dioxide fixation
49. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
electron transport
codon
nuclear pores
organism
50. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
vacuole
vascular plants
genome