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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. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metabolism
gene
metaphase
photolysis
2. (adenosine triphosphate) main energy source that cells use for most of their work
stigma
cell cycle
anther
ATP
3. The substance acted upon by an enzyme
grana
substrate
stroma
perennial
4. A substance that retards or stops enzymatic activity
post-transcriptional processing
metaphase
inhibitor
microfilaments
5. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
enzymes
DNA
ovules
mitochondria
6. The organic process whereby the DNA sequence in a gene is copied into mRNA
nucleosome
pistil
transcription
ATP
7. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
cristae
active site
nucleolus
cytoskeleton
8. Consists of DNA tightly coiled around proteins
diploid
grana
chromatin
glycolysis
9. Classification of plant which survives only a single season
gymnosperms
annuals
substrate
fermentation
10. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
organism
gametes
endosymbiont hypothesis
11. Body of a chloroplast containing grana
facilitated diffusion
stroma
telophase
catabolism
12. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
inhibitor
translation
krebs cycle
electron microscope
13. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
stamen
enzymes
lysosomes
14. Cell organelle filled with enyzmes need to break down certain materials in the cells
cytokinesis
lysosomes
chromatin
secretory vesicles
15. Used to examine tiny cell organelles
transformation
electron microscope
cell
post-transcriptional processing
16. The male reproductive organ of a flower consisting of anther - filament - and pollen
interphase
stamen
active site
nucleolus
17. 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
gene
telophase
substrate
endoplasmic reticulum
18. The part of an enzyme where the chemical reaction occurs
active site
eukoryotic cells
DNA
cell cycle
19. Small structures in the cytoplasm of a cell that do special jobs
vacuole
virus
organelles
cell wall
20. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
prosthetic group
microfilaments
stigma
21. Change in a DNA sequence that affects genetic information
cytokinesis
mitosis
genome
mutation
22. Breakdown of more complex substances into simpler ones with release of energy
perennial
transduction
active transport
catabolism
23. Green pigment contained in the grana
grana
chlorophyll
pedicel
transformation
24. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
mitosis
mitochondria
centrioles
codon
25. Membrane-bound organelle that stores water and soluble substances
cell cycle
vacuole
stigma
anther
26. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
cell cycle
anaphase
perennial
biennial
27. Cell division that produces reproductive cells in sexually reproducing organisms
transformation
post-transcriptional processing
meiosis
metaphase
28. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
endosymbiont hypothesis
reduction
vacuole
angiosperms
29. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
crossing over
metaphase
endoplasmic reticulum
pistil
30. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
haploid
active site
anther
31. Process by which a cell releases large amounts of material
exocytosis
ovules
translation
pedicel
32. In photosynthesis - this is the splitting of water by light
photolysis
organism
stroma
mitosis
33. Formed when cell membrane surrounds a molecule outside the cell and ingests it
golgi apparatus
endocytic vesicles
cofactor
perennial
34. Transport of a substance across a cell membrane against the concentration gradient
active transport
haploid
exocytosis
cell membrane
35. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
eukoryotic cells
cell cycle
DNA
nucleosome
36. The regular sequence of growth and division that cells undergo
pedicel
filament
microfilaments
cell cycle
37. The female part of a flower composed of ovary and style and stigma and ovules
pistil
mitochondria
transformation
alleles
38. Powerhouse of the cell - organelle that is the site of ATP (energy) production
mitochondria
golgi apparatus
cytoskeleton
anabolism
39. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
filament
stroma
krebs cycle
cytoskeleton
40. A cell having two sets of chromosomes or twice the haploid number
metabolism
diploid
angiosperms
organism
41. Area where the chromatids of a chromosome are attached
meiosis
centromere
angiosperms
prosthetic group
42. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
annuals
active site
cell wall
nucleosome
43. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
krebs cycle
genome
gymnosperms
shoot apex
44. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
diploid
telophase
prophase
glycolysis
45. Stalk that supports the flower
ATP
pedicel
gene
mitochondria
46. 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)
homologs
microtubules
meiosis
electron transport
47. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
post-transcriptional processing
prokaryotes
virus
grana
48. Cell division which produces two identical cells
translation
mitosis
annuals
nuclear pores
49. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
vascular plants
substrate
homologs
50. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
transformation
secretory vesicles
annuals
nuclear pores