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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. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell membrane
filament
pistil
cell wall
2. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
translation
facilitated diffusion
transduction
codon
3. Production of a chemical compound by a living organism
biosynthesis
endosymbiont hypothesis
homologs
DNA
4. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
enzymes
inhibitor
carbon dioxide fixation
virus
5. The organ that bears the ovules of a flower - base of the pistil
chromatin
ovary
gymnosperms
biosynthesis
6. The stalk of a stamen that supports the anther
gymnosperms
vacuole
filament
haploid
7. Membrane-bound organelle that stores water and soluble substances
pedicel
telophase
active site
vacuole
8. Pores which allows materials to move in and out of the cell nucleus
nuclear pores
endocytic vesicles
organelles
reduction
9. Small structures in the cytoplasm of a cell that do special jobs
prosthetic group
alleles
gymnosperms
organelles
10. The first stage of mitosis - forming spindle fibres attached to the centromere
metaphase
prophase
endosymbiont hypothesis
catabolism
11. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
filament
endocytic vesicles
endosymbiont hypothesis
glycolysis
12. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
genome
vacuole
chromatin
carbon dioxide fixation
13. Division of the cytoplasm during cell division - new cell is formed
cytokinesis
stroma
crossing over
nucleolus
14. Change in a DNA sequence that affects genetic information
ovules
shoot apex
mutation
grana
15. A cell having two sets of chromosomes or twice the haploid number
diploid
interphase
meiosis
centrioles
16. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
cell wall
annuals
mitochondria
fermentation
17. Double-stranded chains of proteins which give structure to the cell
ATP
microfilaments
cell membrane
stamen
18. Cell division that produces reproductive cells in sexually reproducing organisms
prokaryotes
diploid
substrate
meiosis
19. Vacuole membrane
metaphase
pistil
organism
tonoplast
20. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
microtubules
golgi apparatus
facilitated diffusion
krebs cycle
21. Powerhouse of the cell - organelle that is the site of ATP (energy) production
mitochondria
angiosperms
endosymbiont hypothesis
telophase
22. Reproductive cells - have only half the number of chromosomes
enzymes
organism
gametes
cell
23. Smallest unit of most living things
cell
metabolism
cristae
tonoplast
24. The complete genetic material contained in an individual
tonoplast
genome
microfilaments
cofactor
25. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
prokaryotes
glycolysis
mitosis
catabolism
26. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
diploid
centromere
ATP
27. Sticky portion at the top of the style which traps pollen
inhibitor
cristae
cell cycle
stigma
28. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
eukoryotic cells
endoplasmic reticulum
shoot apex
nucleosome
29. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
crossing over
haploid
cofactor
cell membrane
30. Cell division which produces two identical cells
stamen
prophase
mitosis
prosthetic group
31. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
endoplasmic reticulum
stroma
chromatin
codon
32. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
cell wall
angiosperms
ovary
cofactor
33. Matching Chromosomes that are similar but not identical
enzymes
endocytic vesicles
homologs
stigma
34. Cells that lack a membrane-bound nucleus and membrane-bound organelles
post-transcriptional processing
nucleosome
prokaryotes
chlorophyll
35. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
prokaryotes
endoplasmic reticulum
lysosomes
DNA
36. Modification of a cell by the incorporation of exogenous DNA
transformation
chlorophyll
glycolysis
metaphase
37. Classication of plant which produce seeds which are 'naked' (in cones)
microvilli
gymnosperms
centrioles
filament
38. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
interphase
translation
exocytosis
39. Transport of a substance across a cell membrane against the concentration gradient
electron microscope
chlorophyll
active transport
diploid
40. Process of building up complex materials (proteins) from simple materials
meiosis
crossing over
centrioles
anabolism
41. The male reproductive organ of a flower consisting of anther - filament - and pollen
reduction
stamen
angiosperms
ovary
42. Has a nucleus - has organelles or other cell parts
golgi apparatus
inhibitor
eukoryotic cells
centromere
43. Formed when cell membrane surrounds a molecule outside the cell and ingests it
angiosperms
endocytic vesicles
tonoplast
microtubules
44. The organic process whereby the DNA sequence in a gene is copied into mRNA
angiosperms
electron microscope
transcription
DNA
45. Small - dense region within most nuclei in which the assembly of RNA proteins begins
glycolysis
ovary
endocytic vesicles
nucleolus
46. Composed of a bilayer of lipids embedded with globular proteins
pistil
tonoplast
cytokinesis
cell membrane
47. In photosynthesis - this is the splitting of water by light
cell cycle
endosymbiont hypothesis
crossing over
photolysis
48. Structure within ovary of plant that contains egg cells
glycolysis
reduction
DNA
ovules
49. (adenosine triphosphate) main energy source that cells use for most of their work
ATP
shoot apex
post-transcriptional processing
transduction
50. Classification of plant whose life cycle survives two seasons
transduction
cell cycle
biennial
cytokinesis