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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. Transport of a substance across a cell membrane against the concentration gradient
microvilli
transduction
active transport
interphase
2. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
mitosis
haploid
ovules
virus
3. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
centrioles
pistil
mutation
vascular plants
4. The male reproductive organ of a flower consisting of anther - filament - and pollen
stamen
mitochondria
perennial
anabolism
5. A cell having two sets of chromosomes or twice the haploid number
active site
mutation
diploid
prokaryotes
6. Membrane-bound organelle that stores water and soluble substances
prosthetic group
homologs
vacuole
nucleolus
7. The organic process whereby the DNA sequence in a gene is copied into mRNA
fermentation
transcription
biennial
cell cycle
8. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
glycolysis
crossing over
cristae
anaphase
9. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
interphase
cell
DNA
ovary
10. Cell division that produces reproductive cells in sexually reproducing organisms
electron microscope
meiosis
cofactor
mutation
11. Sequence of DNA that codes for a protein and thus determines a trait
annuals
cristae
gene
angiosperms
12. A substance that must join with the enzyme to enable it to fit the substrate
endosymbiont hypothesis
cofactor
nucleolus
cell membrane
13. Powerhouse of the cell - organelle that is the site of ATP (energy) production
stigma
cell membrane
telophase
mitochondria
14. Consists of DNA tightly coiled around proteins
chromatin
angiosperms
carbon dioxide fixation
anaphase
15. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
cytokinesis
cell wall
electron microscope
16. Disk-like plates which are the site of photosynthesis in chloroplasts
grana
chromatids
translation
prosthetic group
17. The second phase of mitosis - during which the chromosomes line up across the center of the cell
inhibitor
metaphase
codon
perennial
18. Classification of plant whose life cycle survives two seasons
glycolysis
prokaryotes
centrioles
biennial
19. Cell organelle filled with enyzmes need to break down certain materials in the cells
stroma
transformation
endosymbiont hypothesis
lysosomes
20. A substance that retards or stops enzymatic activity
carbon dioxide fixation
inhibitor
golgi apparatus
microfilaments
21. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
pedicel
microtubules
annuals
gametes
22. The organ that bears the ovules of a flower - base of the pistil
pistil
ovary
cytokinesis
mitochondria
23. The first stage of mitosis - forming spindle fibres attached to the centromere
prophase
chromatids
lysosomes
anaphase
24. Have tissues made of cells that transport water and nutrients throughout the plant
cytoskeleton
telophase
vascular plants
tonoplast
25. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
tonoplast
ATP
cell cycle
cristae
26. Living thing
organism
stamen
centromere
eukoryotic cells
27. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
endosymbiont hypothesis
electron transport
genome
post-transcriptional processing
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)
codon
DNA
electron transport
grana
29. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
centromere
microtubules
virus
krebs cycle
30. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
reduction
endocytic vesicles
translation
codon
31. Smallest unit of most living things
transcription
prosthetic group
cell
microtubules
32. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
mitosis
substrate
cell
prosthetic group
33. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
photolysis
crossing over
cell membrane
endosymbiont hypothesis
34. In photosynthesis - this is the splitting of water by light
grana
photolysis
anther
stamen
35. Cell division which produces two identical cells
transcription
mitosis
translation
stigma
36. The complete genetic material contained in an individual
transduction
centrioles
genome
annuals
37. 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
krebs cycle
stamen
electron microscope
endoplasmic reticulum
38. Used to examine tiny cell organelles
microfilaments
perennial
electron microscope
ovary
39. Two identical chromosomes that split and contain the same genetic material
transformation
chromatids
vacuole
homologs
40. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
microfilaments
carbon dioxide fixation
filament
microvilli
41. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
prosthetic group
secretory vesicles
active transport
stamen
42. Classification of plant which survives only a single season
haploid
annuals
perennial
catabolism
43. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
gametes
perennial
reduction
anaphase
44. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
golgi apparatus
cell wall
cofactor
prokaryotes
45. Cells that lack a membrane-bound nucleus and membrane-bound organelles
gene
interphase
stigma
prokaryotes
46. The stalk of a stamen that supports the anther
filament
nucleolus
anaphase
reduction
47. A cell having only one complete set of chromosomes
photolysis
chromatin
codon
haploid
48. The process of transfering genetic material from one cell to another
transduction
cofactor
ovary
prokaryotes
49. The regular sequence of growth and division that cells undergo
cell cycle
haploid
perennial
cristae
50. Stores - packages and ships proteins
catabolism
vacuole
golgi apparatus
nuclear pores