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Test your basic knowledge |
CLEP Natural Science
Start Test
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Subjects
:
clep
,
science
Instructions:
Answer 50 questions in 15 minutes.
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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. Small - dense region within most nuclei in which the assembly of RNA proteins begins
nucleolus
alleles
perennial
cytokinesis
2. The part of the stamen that contains pollen
prosthetic group
cytoskeleton
ribosomes
anther
3. A substance that retards or stops enzymatic activity
anaphase
inhibitor
virus
cytokinesis
4. Cell division that produces reproductive cells in sexually reproducing organisms
gametes
chromatin
meiosis
cell membrane
5. 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)
catabolism
reduction
electron transport
active site
6. Small structures in the cytoplasm of a cell that do special jobs
organelles
tonoplast
metabolism
substrate
7. Body of a chloroplast containing grana
filament
stroma
vascular plants
carbon dioxide fixation
8. Cell organelle filled with enyzmes need to break down certain materials in the cells
lysosomes
filament
electron transport
translation
9. Formed when cell membrane surrounds a molecule outside the cell and ingests it
centromere
secretory vesicles
active transport
endocytic vesicles
10. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
cristae
annuals
prophase
mutation
11. The second phase of mitosis - during which the chromosomes line up across the center of the cell
cristae
metaphase
cytokinesis
chromatids
12. Classification of plant whose life cycle survives two seasons
chromatin
filament
carbon dioxide fixation
biennial
13. Composed of a bilayer of lipids embedded with globular proteins
cell membrane
chromatids
annuals
endocytic vesicles
14. Pores which allows materials to move in and out of the cell nucleus
cell membrane
nuclear pores
cell
microvilli
15. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
exocytosis
crossing over
transcription
facilitated diffusion
16. Transport of a substance across a cell membrane against the concentration gradient
gametes
filament
perennial
active transport
17. Projections on cell membrane increase surface area
endocytic vesicles
microvilli
active site
endosymbiont hypothesis
18. The male reproductive organ of a flower consisting of anther - filament - and pollen
annuals
stamen
transformation
cell membrane
19. Used to examine tiny cell organelles
virus
electron microscope
mitochondria
vascular plants
20. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
fermentation
ovules
angiosperms
codon
21. The complete genetic material contained in an individual
endosymbiont hypothesis
genome
cell cycle
annuals
22. Proteins that act as biological catalysts
centromere
shoot apex
alleles
enzymes
23. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
electron microscope
endosymbiont hypothesis
centrioles
meiosis
24. Structure within ovary of plant that contains egg cells
filament
cell
gene
ovules
25. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
virus
substrate
nucleosome
cytoskeleton
26. The female part of a flower composed of ovary and style and stigma and ovules
meiosis
pistil
cytokinesis
electron microscope
27. Sequence of DNA that codes for a protein and thus determines a trait
gene
prokaryotes
transduction
endoplasmic reticulum
28. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
secretory vesicles
transcription
meiosis
vacuole
29. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
microfilaments
reduction
telophase
prosthetic group
30. Powerhouse of the cell - organelle that is the site of ATP (energy) production
stroma
mitochondria
gymnosperms
organelles
31. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
metabolism
metaphase
organelles
haploid
32. Classication of plant which produce seeds which are 'naked' (in cones)
diploid
secretory vesicles
gymnosperms
electron microscope
33. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
anther
meiosis
microtubules
golgi apparatus
34. Has a nucleus - has organelles or other cell parts
eukoryotic cells
prokaryotes
alleles
tonoplast
35. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
endosymbiont hypothesis
post-transcriptional processing
inhibitor
golgi apparatus
36. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
anaphase
interphase
cell cycle
ovary
37. Membrane-bound organelle that stores water and soluble substances
vacuole
prophase
exocytosis
nuclear pores
38. A cell having two sets of chromosomes or twice the haploid number
telophase
microtubules
haploid
diploid
39. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
microfilaments
electron microscope
transcription
cytoskeleton
40. The part of an enzyme where the chemical reaction occurs
active site
ovules
perennial
endoplasmic reticulum
41. Process by which a cell releases large amounts of material
exocytosis
krebs cycle
organelles
prosthetic group
42. Smallest unit of most living things
microvilli
photolysis
chlorophyll
cell
43. Double-stranded chains of proteins which give structure to the cell
reduction
DNA
microfilaments
centromere
44. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
chromatids
cofactor
glycolysis
cell
45. The organic process whereby the DNA sequence in a gene is copied into mRNA
inhibitor
substrate
biosynthesis
transcription
46. Green pigment contained in the grana
photolysis
substrate
virus
chlorophyll
47. Different forms of a gene
centrioles
haploid
electron microscope
alleles
48. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
nucleolus
active site
secretory vesicles
49. Area where the chromatids of a chromosome are attached
gene
centromere
prophase
ovules
50. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
meiosis
cell wall
prophase
genome
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