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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. Stores - packages and ships proteins
microfilaments
homologs
krebs cycle
golgi apparatus
2. Pores which allows materials to move in and out of the cell nucleus
microvilli
ovary
active transport
nuclear pores
3. Powerhouse of the cell - organelle that is the site of ATP (energy) production
active transport
translation
anaphase
mitochondria
4. Change in a DNA sequence that affects genetic information
endocytic vesicles
DNA
mutation
prophase
5. Used to examine tiny cell organelles
substrate
electron microscope
stigma
lysosomes
6. Cell division which produces two identical cells
stamen
homologs
mitosis
nucleosome
7. Living thing
lysosomes
organism
golgi apparatus
haploid
8. A cell having only one complete set of chromosomes
reduction
ovules
exocytosis
haploid
9. Transport of a substance across a cell membrane against the concentration gradient
prokaryotes
electron transport
alleles
active transport
10. Area where the chromatids of a chromosome are attached
substrate
fermentation
ovules
centromere
11. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
endoplasmic reticulum
exocytosis
cytokinesis
12. In photosynthesis - this is the splitting of water by light
microfilaments
translation
photolysis
mitosis
13. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
cristae
homologs
stroma
post-transcriptional processing
14. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
grana
organism
virus
stroma
15. The part of an enzyme where the chemical reaction occurs
active site
reduction
electron transport
microtubules
16. Projections on cell membrane increase surface area
microvilli
angiosperms
substrate
post-transcriptional processing
17. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
crossing over
angiosperms
golgi apparatus
transformation
18. Disk-like plates which are the site of photosynthesis in chloroplasts
lysosomes
stamen
grana
anabolism
19. Have tissues made of cells that transport water and nutrients throughout the plant
endosymbiont hypothesis
diploid
vascular plants
prokaryotes
20. Consists of DNA tightly coiled around proteins
gametes
chromatin
anaphase
tonoplast
21. The male reproductive organ of a flower consisting of anther - filament - and pollen
stamen
filament
mitochondria
codon
22. Breakdown of more complex substances into simpler ones with release of energy
anther
active transport
catabolism
angiosperms
23. Sequence of DNA that codes for a protein and thus determines a trait
grana
diploid
gene
golgi apparatus
24. The female part of a flower composed of ovary and style and stigma and ovules
DNA
pistil
metabolism
interphase
25. Smallest unit of most living things
metaphase
cell
cell cycle
secretory vesicles
26. Membrane-bound organelle that stores water and soluble substances
active site
carbon dioxide fixation
secretory vesicles
vacuole
27. A substance that must join with the enzyme to enable it to fit the substrate
homologs
prosthetic group
gene
cofactor
28. 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
alleles
centrioles
krebs cycle
29. Classication of plant which produce seeds which are 'naked' (in cones)
photolysis
crossing over
DNA
gymnosperms
30. Stalk that supports the flower
ribosomes
gametes
biosynthesis
pedicel
31. Different forms of a gene
mitosis
endosymbiont hypothesis
stigma
alleles
32. Modification of a cell by the incorporation of exogenous DNA
enzymes
transformation
endocytic vesicles
facilitated diffusion
33. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
anther
krebs cycle
codon
facilitated diffusion
34. Small - dense region within most nuclei in which the assembly of RNA proteins begins
haploid
electron transport
nucleolus
cytoskeleton
35. Sticky portion at the top of the style which traps pollen
stigma
shoot apex
transcription
alleles
36. Process of building up complex materials (proteins) from simple materials
ribosomes
anabolism
catabolism
prokaryotes
37. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
pedicel
ribosomes
anaphase
centromere
38. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
cytokinesis
catabolism
carbon dioxide fixation
translation
39. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
transcription
shoot apex
metaphase
cofactor
40. Double-stranded chains of proteins which give structure to the cell
microfilaments
chromatids
nucleosome
microvilli
41. The part of the stamen that contains pollen
cell wall
active transport
anther
chlorophyll
42. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
biennial
DNA
codon
shoot apex
43. Production of a chemical compound by a living organism
biosynthesis
anabolism
cell wall
mutation
44. The first stage of mitosis - forming spindle fibres attached to the centromere
golgi apparatus
krebs cycle
interphase
prophase
45. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
haploid
nucleosome
substrate
microtubules
46. Process by which a cell releases large amounts of material
mutation
electron transport
chromatids
exocytosis
47. Reproductive cells - have only half the number of chromosomes
diploid
gametes
prokaryotes
reduction
48. Classification of plant whose life cycle survives two seasons
haploid
meiosis
biennial
catabolism
49. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
fermentation
crossing over
organism
biennial
50. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
cofactor
microtubules
nucleosome
secretory vesicles
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