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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 substance acted upon by an enzyme
inhibitor
centromere
substrate
vascular plants
2. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
genome
anaphase
metabolism
ovules
3. (adenosine triphosphate) main energy source that cells use for most of their work
alleles
annuals
DNA
ATP
4. Composed of a bilayer of lipids embedded with globular proteins
meiosis
gametes
cell membrane
mitochondria
5. Consists of DNA tightly coiled around proteins
metaphase
secretory vesicles
chromatids
chromatin
6. Cells that lack a membrane-bound nucleus and membrane-bound organelles
lysosomes
chlorophyll
prokaryotes
biennial
7. 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)
electron transport
glycolysis
filament
catabolism
8. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
endosymbiont hypothesis
exocytosis
active site
pistil
9. Reproductive cells - have only half the number of chromosomes
electron transport
prokaryotes
krebs cycle
gametes
10. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
anaphase
translation
enzymes
11. The organic process whereby the DNA sequence in a gene is copied into mRNA
anabolism
transcription
inhibitor
electron microscope
12. The stalk of a stamen that supports the anther
filament
pedicel
interphase
chlorophyll
13. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
angiosperms
prophase
exocytosis
secretory vesicles
14. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
diploid
mitochondria
translation
crossing over
15. Division of the cytoplasm during cell division - new cell is formed
transformation
active site
cytokinesis
cell
16. The female part of a flower composed of ovary and style and stigma and ovules
pistil
cytokinesis
gametes
golgi apparatus
17. Structure within ovary of plant that contains egg cells
cell
ovules
diploid
exocytosis
18. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
interphase
metaphase
stroma
tonoplast
19. The complete genetic material contained in an individual
reduction
genome
post-transcriptional processing
virus
20. Modification of a cell by the incorporation of exogenous DNA
stamen
transformation
codon
transduction
21. The regular sequence of growth and division that cells undergo
cell cycle
haploid
perennial
pedicel
22. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
cytoskeleton
chlorophyll
vacuole
shoot apex
23. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
translation
DNA
ribosomes
anaphase
24. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
endosymbiont hypothesis
carbon dioxide fixation
mitochondria
25. 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
transformation
active site
endoplasmic reticulum
annuals
26. Cell division which produces two identical cells
transformation
prosthetic group
meiosis
mitosis
27. The part of an enzyme where the chemical reaction occurs
active site
interphase
nucleolus
organism
28. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
gene
centromere
active transport
29. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
exocytosis
electron microscope
mutation
30. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
electron microscope
cytoskeleton
substrate
31. Classification of plant whose life cycle survives two seasons
endoplasmic reticulum
biennial
stamen
chromatin
32. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
cristae
electron transport
alleles
33. Formed when cell membrane surrounds a molecule outside the cell and ingests it
alleles
cell
endocytic vesicles
glycolysis
34. Classification of plant which survives only a single season
endosymbiont hypothesis
chromatin
annuals
carbon dioxide fixation
35. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
facilitated diffusion
prosthetic group
krebs cycle
electron transport
36. Transport of a substance across a cell membrane against the concentration gradient
active transport
microtubules
electron transport
mutation
37. Small structures in the cytoplasm of a cell that do special jobs
pedicel
organelles
cytoskeleton
angiosperms
38. Process by which a cell releases large amounts of material
exocytosis
filament
cristae
vacuole
39. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
telophase
stamen
prokaryotes
cell wall
40. The part of the stamen that contains pollen
DNA
anther
fermentation
anaphase
41. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
homologs
mitosis
anther
42. A substance that must join with the enzyme to enable it to fit the substrate
golgi apparatus
prosthetic group
cytoskeleton
cofactor
43. Smallest unit of most living things
cell cycle
centromere
catabolism
cell
44. Pores which allows materials to move in and out of the cell nucleus
golgi apparatus
cell membrane
nucleosome
nuclear pores
45. A substance that retards or stops enzymatic activity
annuals
translation
inhibitor
active site
46. Vacuole membrane
shoot apex
nuclear pores
active transport
tonoplast
47. Membrane-bound organelle that stores water and soluble substances
exocytosis
vacuole
interphase
microtubules
48. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
organelles
fermentation
post-transcriptional processing
prosthetic group
49. Sequence of DNA that codes for a protein and thus determines a trait
tonoplast
cell membrane
gene
stigma
50. Matching Chromosomes that are similar but not identical
homologs
shoot apex
active transport
carbon dioxide fixation