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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 organ that bears the ovules of a flower - base of the pistil
annuals
substrate
ovary
cristae
2. Membrane-bound organelle that stores water and soluble substances
pedicel
vacuole
perennial
crossing over
3. Double-stranded chains of proteins which give structure to the cell
stroma
microfilaments
cell wall
interphase
4. In photosynthesis - this is the splitting of water by light
photolysis
angiosperms
krebs cycle
gene
5. Small - dense region within most nuclei in which the assembly of RNA proteins begins
photolysis
nucleolus
mitosis
chromatids
6. Body of a chloroplast containing grana
microfilaments
stroma
nuclear pores
nucleolus
7. Has a nucleus - has organelles or other cell parts
endosymbiont hypothesis
eukoryotic cells
cell cycle
cell wall
8. Classication of plant which produce seeds which are 'naked' (in cones)
shoot apex
gymnosperms
microvilli
centromere
9. Structure within ovary of plant that contains egg cells
shoot apex
ovules
mutation
endoplasmic reticulum
10. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
gametes
carbon dioxide fixation
metabolism
prokaryotes
11. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
mutation
ribosomes
nucleosome
12. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
post-transcriptional processing
cell
annuals
13. Small structures in the cytoplasm of a cell that do special jobs
annuals
photolysis
anaphase
organelles
14. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
endoplasmic reticulum
glycolysis
carbon dioxide fixation
nucleosome
15. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
post-transcriptional processing
enzymes
ovules
16. Process of building up complex materials (proteins) from simple materials
anabolism
electron transport
ribosomes
biennial
17. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
substrate
prosthetic group
cell membrane
anabolism
18. Consists of DNA tightly coiled around proteins
chromatin
carbon dioxide fixation
fermentation
endocytic vesicles
19. Plants that grow year after year
perennial
tonoplast
endocytic vesicles
cell wall
20. Classification of plant whose life cycle survives two seasons
prokaryotes
shoot apex
microvilli
biennial
21. The part of an enzyme where the chemical reaction occurs
cytokinesis
stroma
crossing over
active site
22. Cell organelle filled with enyzmes need to break down certain materials in the cells
substrate
lysosomes
codon
prosthetic group
23. Green pigment contained in the grana
biennial
chlorophyll
inhibitor
interphase
24. Process by which a cell releases large amounts of material
cytoskeleton
crossing over
diploid
exocytosis
25. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
active transport
stigma
enzymes
anaphase
26. 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)
ATP
electron transport
endosymbiont hypothesis
perennial
27. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
DNA
nucleosome
organism
gametes
28. Stalk that supports the flower
prokaryotes
pedicel
interphase
secretory vesicles
29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
interphase
substrate
nucleosome
eukoryotic cells
30. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
chlorophyll
diploid
ATP
fermentation
31. Powerhouse of the cell - organelle that is the site of ATP (energy) production
transformation
endoplasmic reticulum
mitochondria
lysosomes
32. Projections on cell membrane increase surface area
microvilli
transformation
catabolism
vacuole
33. Cell division that produces reproductive cells in sexually reproducing organisms
filament
meiosis
gametes
stamen
34. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
microtubules
carbon dioxide fixation
electron microscope
35. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
post-transcriptional processing
organism
krebs cycle
ATP
36. Area where the chromatids of a chromosome are attached
electron microscope
centromere
endoplasmic reticulum
annuals
37. The stalk of a stamen that supports the anther
diploid
genome
filament
cell wall
38. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
microvilli
cell cycle
translation
cell membrane
39. Division of the cytoplasm during cell division - new cell is formed
virus
cytokinesis
metaphase
organelles
40. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
nucleosome
codon
cytoskeleton
angiosperms
41. Used to examine tiny cell organelles
haploid
electron microscope
centrioles
gene
42. The male reproductive organ of a flower consisting of anther - filament - and pollen
cytoskeleton
stamen
chromatids
cell
43. Matching Chromosomes that are similar but not identical
endoplasmic reticulum
homologs
endosymbiont hypothesis
pistil
44. Breakdown of more complex substances into simpler ones with release of energy
enzymes
mutation
catabolism
cell wall
45. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
enzymes
mitosis
post-transcriptional processing
46. 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
exocytosis
endoplasmic reticulum
gymnosperms
electron transport
47. Production of a chemical compound by a living organism
stigma
inhibitor
prophase
biosynthesis
48. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
angiosperms
organelles
codon
reduction
49. Living thing
cell cycle
mutation
organism
vacuole
50. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
facilitated diffusion
reduction
tonoplast
cytoskeleton
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