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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. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
carbon dioxide fixation
organism
cell
perennial
2. The organ that bears the ovules of a flower - base of the pistil
ovary
cofactor
gene
tonoplast
3. Have tissues made of cells that transport water and nutrients throughout the plant
vascular plants
perennial
endocytic vesicles
virus
4. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
anaphase
enzymes
DNA
meiosis
5. Sequence of DNA that codes for a protein and thus determines a trait
gene
electron microscope
reduction
lysosomes
6. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
electron microscope
grana
facilitated diffusion
chromatids
7. Stores - packages and ships proteins
golgi apparatus
prophase
fermentation
nucleolus
8. Small - dense region within most nuclei in which the assembly of RNA proteins begins
microvilli
alleles
ovules
nucleolus
9. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
genome
telophase
cell wall
facilitated diffusion
10. Two identical chromosomes that split and contain the same genetic material
chromatids
cell cycle
facilitated diffusion
mitochondria
11. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
organelles
vascular plants
secretory vesicles
post-transcriptional processing
12. Has a nucleus - has organelles or other cell parts
organism
chromatids
eukoryotic cells
lysosomes
13. Stalk that supports the flower
pedicel
prophase
photolysis
cell membrane
14. Projections on cell membrane increase surface area
nuclear pores
microvilli
ribosomes
vascular plants
15. The process of transfering genetic material from one cell to another
cell
active transport
nuclear pores
transduction
16. A cell having two sets of chromosomes or twice the haploid number
diploid
secretory vesicles
alleles
anabolism
17. The female part of a flower composed of ovary and style and stigma and ovules
meiosis
centrioles
lysosomes
pistil
18. The male reproductive organ of a flower consisting of anther - filament - and pollen
vascular plants
reduction
genome
stamen
19. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
microvilli
gymnosperms
cytoskeleton
20. A substance that retards or stops enzymatic activity
translation
inhibitor
organelles
centrioles
21. Change in a DNA sequence that affects genetic information
stamen
mutation
microfilaments
filament
22. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
anther
microtubules
mitosis
biennial
23. Consists of DNA tightly coiled around proteins
shoot apex
cell cycle
biosynthesis
chromatin
24. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
ribosomes
cofactor
interphase
endosymbiont hypothesis
25. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
cell cycle
catabolism
DNA
golgi apparatus
26. Structure within ovary of plant that contains egg cells
ovules
angiosperms
prosthetic group
crossing over
27. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
haploid
anaphase
cristae
anabolism
28. Cell division which produces two identical cells
biennial
substrate
mitosis
chlorophyll
29. Process of building up complex materials (proteins) from simple materials
ATP
anabolism
perennial
mitosis
30. Pores which allows materials to move in and out of the cell nucleus
electron transport
alleles
nuclear pores
golgi apparatus
31. The first stage of mitosis - forming spindle fibres attached to the centromere
mitochondria
alleles
diploid
prophase
32. Sticky portion at the top of the style which traps pollen
stigma
prokaryotes
inhibitor
chlorophyll
33. Classification of plant whose life cycle survives two seasons
endoplasmic reticulum
annuals
biennial
metabolism
34. Process by which a cell releases large amounts of material
grana
exocytosis
ribosomes
fermentation
35. Composed of a bilayer of lipids embedded with globular proteins
mitosis
cell membrane
chlorophyll
alleles
36. A substance that must join with the enzyme to enable it to fit the substrate
alleles
metaphase
cofactor
microtubules
37. Vacuole membrane
enzymes
tonoplast
fermentation
centromere
38. Transport of a substance across a cell membrane against the concentration gradient
prophase
active transport
centrioles
tonoplast
39. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
cell wall
prosthetic group
codon
photolysis
40. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
shoot apex
electron transport
cell cycle
post-transcriptional processing
41. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
interphase
gametes
prophase
endosymbiont hypothesis
42. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
mitosis
tonoplast
endosymbiont hypothesis
interphase
43. Reproductive cells - have only half the number of chromosomes
reduction
fermentation
endosymbiont hypothesis
gametes
44. 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)
transduction
centrioles
active site
electron transport
45. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
telophase
diploid
virus
shoot apex
46. Proteins that act as biological catalysts
prophase
mitochondria
enzymes
ovary
47. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
interphase
fermentation
metabolism
endoplasmic reticulum
48. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
alleles
crossing over
glycolysis
microvilli
49. Cell division that produces reproductive cells in sexually reproducing organisms
meiosis
inhibitor
exocytosis
nucleosome
50. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
cytokinesis
metabolism
anaphase
reduction