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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. Used to examine tiny cell organelles
microtubules
electron microscope
mutation
fermentation
2. A cell having only one complete set of chromosomes
ovary
haploid
DNA
genome
3. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
reduction
shoot apex
nuclear pores
secretory vesicles
4. Division of the cytoplasm during cell division - new cell is formed
cytokinesis
pedicel
cofactor
mitosis
5. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
krebs cycle
crossing over
facilitated diffusion
anaphase
6. Cell division which produces two identical cells
mitosis
carbon dioxide fixation
microfilaments
secretory vesicles
7. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
tonoplast
reduction
mutation
8. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
substrate
cell wall
stigma
nucleosome
9. A substance that must join with the enzyme to enable it to fit the substrate
organism
perennial
annuals
cofactor
10. Process by which a cell releases large amounts of material
microvilli
pistil
virus
exocytosis
11. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
golgi apparatus
anabolism
ATP
crossing over
12. Living thing
organism
centrioles
active transport
prokaryotes
13. Change in a DNA sequence that affects genetic information
mutation
prosthetic group
translation
secretory vesicles
14. Small - dense region within most nuclei in which the assembly of RNA proteins begins
chromatin
exocytosis
nucleolus
annuals
15. Modification of a cell by the incorporation of exogenous DNA
centromere
exocytosis
transformation
active transport
16. Green pigment contained in the grana
krebs cycle
chlorophyll
exocytosis
alleles
17. Production of a chemical compound by a living organism
photolysis
vacuole
biosynthesis
stroma
18. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
prokaryotes
meiosis
lysosomes
19. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
metaphase
electron transport
organism
microtubules
20. Structure within ovary of plant that contains egg cells
eukoryotic cells
meiosis
cell wall
ovules
21. Membrane-bound organelle that stores water and soluble substances
microvilli
vacuole
facilitated diffusion
shoot apex
22. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
ovary
homologs
secretory vesicles
DNA
23. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
fermentation
pistil
filament
prosthetic group
24. Vacuole membrane
tonoplast
pedicel
prosthetic group
vascular plants
25. The second phase of mitosis - during which the chromosomes line up across the center of the cell
anaphase
catabolism
transduction
metaphase
26. Cell division that produces reproductive cells in sexually reproducing organisms
cofactor
meiosis
filament
exocytosis
27. Reproductive cells - have only half the number of chromosomes
mutation
active site
pistil
gametes
28. The complete genetic material contained in an individual
annuals
transcription
microfilaments
genome
29. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
prokaryotes
prophase
annuals
30. Double-stranded chains of proteins which give structure to the cell
alleles
ATP
angiosperms
microfilaments
31. 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)
genome
electron transport
anaphase
glycolysis
32. Stores - packages and ships proteins
metaphase
post-transcriptional processing
golgi apparatus
mitosis
33. Projections on cell membrane increase surface area
anabolism
microvilli
pistil
chlorophyll
34. Classification of plant which survives only a single season
meiosis
lysosomes
annuals
nucleosome
35. Two identical chromosomes that split and contain the same genetic material
centromere
chromatids
photolysis
transduction
36. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
centrioles
angiosperms
prosthetic group
DNA
37. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
eukoryotic cells
inhibitor
cell wall
transduction
38. Classification of plant whose life cycle survives two seasons
stigma
inhibitor
homologs
biennial
39. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
annuals
post-transcriptional processing
organism
active site
40. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
anaphase
virus
gymnosperms
41. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
translation
pedicel
vascular plants
42. Proteins that act as biological catalysts
enzymes
secretory vesicles
endosymbiont hypothesis
endocytic vesicles
43. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
codon
homologs
biosynthesis
44. 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
shoot apex
endoplasmic reticulum
metabolism
prosthetic group
45. The male reproductive organ of a flower consisting of anther - filament - and pollen
telophase
stamen
electron microscope
prophase
46. The regular sequence of growth and division that cells undergo
telophase
translation
transcription
cell cycle
47. Different forms of a gene
centrioles
inhibitor
codon
alleles
48. A cell having two sets of chromosomes or twice the haploid number
carbon dioxide fixation
endoplasmic reticulum
krebs cycle
diploid
49. Smallest unit of most living things
prosthetic group
organism
photolysis
cell
50. Small structures in the cytoplasm of a cell that do special jobs
nucleosome
anther
organelles
cofactor