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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.
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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. Classication of plant which produce seeds which are 'naked' (in cones)
substrate
stamen
microtubules
gymnosperms
2. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
microfilaments
prosthetic group
electron transport
nucleosome
3. Smallest unit of most living things
cofactor
angiosperms
cell
codon
4. Have tissues made of cells that transport water and nutrients throughout the plant
cell membrane
centrioles
vascular plants
carbon dioxide fixation
5. The male reproductive organ of a flower consisting of anther - filament - and pollen
endoplasmic reticulum
haploid
genome
stamen
6. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division
reduction
endosymbiont hypothesis
fermentation
krebs cycle
7. Small structures in the cytoplasm of a cell that do special jobs
stamen
mitosis
cell membrane
organelles
8. Formed when cell membrane surrounds a molecule outside the cell and ingests it
endocytic vesicles
cell
angiosperms
facilitated diffusion
9. Sticky portion at the top of the style which traps pollen
microtubules
transcription
centromere
stigma
10. Cell division that produces reproductive cells in sexually reproducing organisms
meiosis
glycolysis
electron microscope
gene
11. Plants that grow year after year
perennial
annuals
biennial
endoplasmic reticulum
12. A cell having only one complete set of chromosomes
grana
eukoryotic cells
haploid
metabolism
13. Has a nucleus - has organelles or other cell parts
centromere
ribosomes
eukoryotic cells
mutation
14. Transport of a substance across a cell membrane against the concentration gradient
filament
carbon dioxide fixation
nuclear pores
active transport
15. Different forms of a gene
alleles
nuclear pores
codon
stigma
16. Living thing
enzymes
endoplasmic reticulum
organism
eukoryotic cells
17. Modification of a cell by the incorporation of exogenous DNA
pistil
mitochondria
transformation
fermentation
18. The stalk of a stamen that supports the anther
enzymes
electron microscope
filament
annuals
19. 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
endoplasmic reticulum
microfilaments
virus
lysosomes
20. Sequence of DNA that codes for a protein and thus determines a trait
ovules
alleles
crossing over
gene
21. Green pigment contained in the grana
chlorophyll
mitochondria
cell membrane
metaphase
22. A cell having two sets of chromosomes or twice the haploid number
diploid
anther
electron microscope
DNA
23. Double-stranded chains of proteins which give structure to the cell
krebs cycle
endocytic vesicles
organelles
microfilaments
24. 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)
tonoplast
centromere
glycolysis
electron transport
25. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
alleles
filament
anaphase
codon
26. Change in a DNA sequence that affects genetic information
metabolism
mutation
organism
endocytic vesicles
27. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
telophase
haploid
filament
cytoskeleton
28. The complete genetic material contained in an individual
genome
endocytic vesicles
cell cycle
facilitated diffusion
29. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
vascular plants
eukoryotic cells
ATP
glycolysis
30. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
metaphase
ovules
shoot apex
diploid
31. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
cell
gene
translation
crossing over
32. Small - dense region within most nuclei in which the assembly of RNA proteins begins
codon
nucleolus
pistil
prosthetic group
33. The part of an enzyme where the chemical reaction occurs
active site
chromatids
organism
nucleolus
34. Consists of DNA tightly coiled around proteins
stroma
reduction
biennial
chromatin
35. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
annuals
grana
mitosis
36. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
haploid
substrate
translation
fermentation
37. Breakdown of more complex substances into simpler ones with release of energy
catabolism
centromere
centrioles
cell wall
38. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
exocytosis
ribosomes
vascular plants
filament
39. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
cell cycle
cristae
metabolism
enzymes
40. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
transformation
electron microscope
virus
metaphase
41. A substance that retards or stops enzymatic activity
cell
prophase
cell cycle
inhibitor
42. Structure within ovary of plant that contains egg cells
mitosis
eukoryotic cells
stroma
ovules
43. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
cytoskeleton
secretory vesicles
pedicel
biosynthesis
44. Cell division which produces two identical cells
metaphase
mitosis
centrioles
prokaryotes
45. The second phase of mitosis - during which the chromosomes line up across the center of the cell
facilitated diffusion
virus
electron transport
metaphase
46. Production of a chemical compound by a living organism
centromere
nucleosome
biosynthesis
endoplasmic reticulum
47. Body of a chloroplast containing grana
mitochondria
codon
gametes
stroma
48. In photosynthesis - this is the splitting of water by light
photolysis
tonoplast
biosynthesis
ovules
49. The female part of a flower composed of ovary and style and stigma and ovules
carbon dioxide fixation
glycolysis
filament
pistil
50. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
inhibitor
microvilli
anaphase
secretory vesicles
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