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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. A cell having only one complete set of chromosomes
genome
chlorophyll
crossing over
haploid
2. Classification of plant whose life cycle survives two seasons
prosthetic group
grana
biennial
alleles
3. The part of the stamen that contains pollen
cell wall
vacuole
anther
ovules
4. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells
eukoryotic cells
stigma
nuclear pores
virus
5. Matching Chromosomes that are similar but not identical
homologs
post-transcriptional processing
chromatids
perennial
6. (adenosine triphosphate) main energy source that cells use for most of their work
post-transcriptional processing
ATP
gene
fermentation
7. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell
DNA
anabolism
microtubules
golgi apparatus
8. Used to examine tiny cell organelles
cell membrane
gametes
electron microscope
stroma
9. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration
stroma
shoot apex
cristae
cytokinesis
10. The organ that bears the ovules of a flower - base of the pistil
biosynthesis
ovary
nuclear pores
stroma
11. Cell division that produces reproductive cells in sexually reproducing organisms
electron transport
grana
exocytosis
meiosis
12. Reproductive cells - have only half the number of chromosomes
prokaryotes
gametes
cofactor
diploid
13. The male reproductive organ of a flower consisting of anther - filament - and pollen
shoot apex
angiosperms
vascular plants
stamen
14. Production of a chemical compound by a living organism
cytoskeleton
biosynthesis
vascular plants
gymnosperms
15. Area where the chromatids of a chromosome are attached
nuclear pores
chromatids
codon
centromere
16. The second phase of mitosis - during which the chromosomes line up across the center of the cell
metaphase
prosthetic group
nucleolus
centromere
17. The organic process whereby the DNA sequence in a gene is copied into mRNA
transcription
post-transcriptional processing
prokaryotes
perennial
18. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
ribosomes
active transport
centrioles
haploid
19. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
haploid
fermentation
facilitated diffusion
inhibitor
20. Stalk that supports the flower
microfilaments
stigma
pedicel
metaphase
21. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
enzymes
telophase
chromatin
gymnosperms
22. Living thing
transformation
organism
codon
metaphase
23. Plants that grow year after year
catabolism
prokaryotes
endocytic vesicles
perennial
24. Sticky portion at the top of the style which traps pollen
nuclear pores
endoplasmic reticulum
microvilli
stigma
25. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
enzymes
telophase
krebs cycle
shoot apex
26. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
cytokinesis
codon
vascular plants
centrioles
27. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
shoot apex
mutation
stroma
annuals
28. A substance that must join with the enzyme to enable it to fit the substrate
biosynthesis
gymnosperms
biennial
cofactor
29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2
interphase
glycolysis
crossing over
microfilaments
30. Has a nucleus - has organelles or other cell parts
ovules
eukoryotic cells
facilitated diffusion
stroma
31. Sequence of DNA that codes for a protein and thus determines a trait
chromatids
gene
electron microscope
transduction
32. A substance that retards or stops enzymatic activity
lysosomes
inhibitor
substrate
gametes
33. The female part of a flower composed of ovary and style and stigma and ovules
stroma
grana
alleles
pistil
34. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
reduction
shoot apex
substrate
endosymbiont hypothesis
35. Composed of a bilayer of lipids embedded with globular proteins
nucleosome
genome
diploid
cell membrane
36. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
prosthetic group
ATP
angiosperms
chromatin
37. Transport of a substance across a cell membrane against the concentration gradient
microvilli
active transport
gametes
stigma
38. Stores - packages and ships proteins
golgi apparatus
annuals
meiosis
prokaryotes
39. Smallest unit of most living things
stroma
organelles
cell
anabolism
40. Change in a DNA sequence that affects genetic information
biennial
prokaryotes
reduction
mutation
41. Consists of DNA tightly coiled around proteins
chromatin
prophase
krebs cycle
golgi apparatus
42. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
microfilaments
interphase
nucleosome
lysosomes
43. The process of transfering genetic material from one cell to another
transduction
facilitated diffusion
microfilaments
endocytic vesicles
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)
organism
electron transport
biennial
krebs cycle
45. Body of a chloroplast containing grana
biosynthesis
stroma
cytoskeleton
centromere
46. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
crossing over
anaphase
haploid
transduction
47. Have tissues made of cells that transport water and nutrients throughout the plant
telophase
ATP
vascular plants
centromere
48. Breakdown of more complex substances into simpler ones with release of energy
ATP
active site
substrate
catabolism
49. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
cytoskeleton
telophase
carbon dioxide fixation
secretory vesicles
50. The substance acted upon by an enzyme
grana
substrate
enzymes
gymnosperms