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Test your basic knowledge |
CLEP Natural Science
Start Test
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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. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
ovules
nucleosome
biosynthesis
2. Pores which allows materials to move in and out of the cell nucleus
glycolysis
cell cycle
nuclear pores
ribosomes
3. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
vacuole
centrioles
mitosis
transduction
4. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
cytokinesis
cell wall
cell membrane
interphase
5. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
chromatids
genome
fermentation
prokaryotes
6. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
chlorophyll
exocytosis
electron transport
metabolism
7. A substance that retards or stops enzymatic activity
inhibitor
endoplasmic reticulum
alleles
reduction
8. The process of transfering genetic material from one cell to another
chlorophyll
transduction
nuclear pores
gametes
9. Cell division that produces reproductive cells in sexually reproducing organisms
meiosis
biennial
golgi apparatus
eukoryotic cells
10. Used to examine tiny cell organelles
cell
gymnosperms
electron microscope
crossing over
11. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
ovules
microfilaments
crossing over
diploid
12. The complete genetic material contained in an individual
vacuole
stigma
genome
cytokinesis
13. The regular sequence of growth and division that cells undergo
microtubules
cofactor
cell cycle
substrate
14. The part of the stamen that contains pollen
anther
endocytic vesicles
vacuole
crossing over
15. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
ATP
cristae
cytoskeleton
electron transport
16. Change in a DNA sequence that affects genetic information
annuals
mutation
transformation
active transport
17. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
krebs cycle
telophase
angiosperms
nucleosome
18. Different forms of a gene
nuclear pores
alleles
pistil
cofactor
19. Reproductive cells - have only half the number of chromosomes
metabolism
mitochondria
gametes
organism
20. Proteins that act as biological catalysts
cytokinesis
enzymes
haploid
interphase
21. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
gene
mutation
prosthetic group
active site
22. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
homologs
endoplasmic reticulum
perennial
23. Membrane-bound organelle that stores water and soluble substances
shoot apex
cytokinesis
vacuole
cytoskeleton
24. Two identical chromosomes that split and contain the same genetic material
stamen
chromatids
haploid
chromatin
25. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
crossing over
secretory vesicles
ovary
26. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
cell wall
gymnosperms
microtubules
endosymbiont hypothesis
27. (adenosine triphosphate) main energy source that cells use for most of their work
cell
endosymbiont hypothesis
ATP
cell cycle
28. Small structures in the cytoplasm of a cell that do special jobs
anther
organelles
vascular plants
organism
29. 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
golgi apparatus
organism
cytokinesis
endoplasmic reticulum
30. A cell having two sets of chromosomes or twice the haploid number
centromere
angiosperms
anaphase
diploid
31. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
metabolism
gametes
crossing over
32. The organic process whereby the DNA sequence in a gene is copied into mRNA
transduction
biosynthesis
transcription
carbon dioxide fixation
33. In photosynthesis - this is the splitting of water by light
photolysis
lysosomes
chromatids
cofactor
34. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
post-transcriptional processing
ribosomes
endocytic vesicles
organism
35. Classification of plant whose life cycle survives two seasons
cytokinesis
microfilaments
cytoskeleton
biennial
36. Classication of plant which produce seeds which are 'naked' (in cones)
angiosperms
nucleolus
tonoplast
gymnosperms
37. Double-stranded chains of proteins which give structure to the cell
haploid
shoot apex
microfilaments
cell membrane
38. Has a nucleus - has organelles or other cell parts
eukoryotic cells
transduction
organelles
stroma
39. Sequence of DNA that codes for a protein and thus determines a trait
gene
metaphase
prosthetic group
filament
40. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
organism
virus
photolysis
crossing over
41. Stalk that supports the flower
cytokinesis
pedicel
fermentation
electron transport
42. A cell having only one complete set of chromosomes
haploid
organelles
ovules
prokaryotes
43. Area where the chromatids of a chromosome are attached
centromere
post-transcriptional processing
cytokinesis
grana
44. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
virus
cell cycle
perennial
shoot apex
45. Consists of DNA tightly coiled around proteins
chromatin
shoot apex
ovules
krebs cycle
46. The first stage of mitosis - forming spindle fibres attached to the centromere
alleles
pedicel
prokaryotes
prophase
47. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
haploid
centrioles
anaphase
cell membrane
48. Formed when cell membrane surrounds a molecule outside the cell and ingests it
cell
grana
endocytic vesicles
centrioles
49. Modification of a cell by the incorporation of exogenous DNA
cytoskeleton
transformation
ribosomes
metaphase
50. Body of a chloroplast containing grana
mitosis
stroma
endosymbiont hypothesis
mutation
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