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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. The stalk of a stamen that supports the anther
perennial
gametes
filament
exocytosis
2. (adenosine triphosphate) main energy source that cells use for most of their work
facilitated diffusion
cytokinesis
microtubules
ATP
3. In photosynthesis - this is the splitting of water by light
pistil
photolysis
catabolism
fermentation
4. Sticky portion at the top of the style which traps pollen
stigma
gametes
microvilli
ATP
5. Stalk that supports the flower
microfilaments
cristae
gametes
pedicel
6. The second phase of mitosis - during which the chromosomes line up across the center of the cell
prosthetic group
eukoryotic cells
metaphase
mutation
7. Different forms of a gene
crossing over
alleles
chlorophyll
secretory vesicles
8. Classification of plant whose life cycle survives two seasons
cytokinesis
cytoskeleton
metabolism
biennial
9. The male reproductive organ of a flower consisting of anther - filament - and pollen
inhibitor
stamen
chlorophyll
cytokinesis
10. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis
exocytosis
microvilli
nucleosome
post-transcriptional processing
11. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
transcription
prosthetic group
cell membrane
prokaryotes
12. A substance that must join with the enzyme to enable it to fit the substrate
cofactor
exocytosis
vacuole
nucleosome
13. Disk-like plates which are the site of photosynthesis in chloroplasts
biosynthesis
grana
substrate
inhibitor
14. Cell division that produces reproductive cells in sexually reproducing organisms
cell membrane
vascular plants
translation
meiosis
15. Production of a chemical compound by a living organism
cell membrane
biosynthesis
stroma
meiosis
16. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid
biosynthesis
electron transport
fermentation
annuals
17. A cell having only one complete set of chromosomes
haploid
anabolism
eukoryotic cells
stamen
18. Classification of plant which survives only a single season
annuals
nuclear pores
anabolism
cristae
19. Projections on cell membrane increase surface area
centromere
microvilli
virus
golgi apparatus
20. Structure within ovary of plant that contains egg cells
microvilli
ovules
post-transcriptional processing
enzymes
21. Matching Chromosomes that are similar but not identical
anaphase
stamen
translation
homologs
22. Living thing
vacuole
organism
shoot apex
exocytosis
23. Cells that lack a membrane-bound nucleus and membrane-bound organelles
gametes
prokaryotes
biennial
inhibitor
24. A substance that retards or stops enzymatic activity
genome
DNA
inhibitor
diploid
25. Body of a chloroplast containing grana
microfilaments
gene
nuclear pores
stroma
26. Sequence of DNA that codes for a protein and thus determines a trait
active site
exocytosis
telophase
gene
27. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
glycolysis
endocytic vesicles
genome
translation
28. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA
chromatids
translation
microfilaments
meiosis
29. The process of transfering genetic material from one cell to another
transduction
enzymes
stigma
pistil
30. Smallest unit of most living things
endosymbiont hypothesis
shoot apex
active transport
cell
31. The organ that bears the ovules of a flower - base of the pistil
angiosperms
active transport
ribosomes
ovary
32. Small - dense region within most nuclei in which the assembly of RNA proteins begins
stigma
glycolysis
inhibitor
nucleolus
33. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
codon
microtubules
haploid
nuclear pores
34. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
telophase
centrioles
transformation
ovary
35. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin
cell wall
biosynthesis
telophase
prokaryotes
36. Vacuole membrane
tonoplast
haploid
pistil
cofactor
37. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
microtubules
endosymbiont hypothesis
anther
cell
38. Has a nucleus - has organelles or other cell parts
eukoryotic cells
golgi apparatus
genome
krebs cycle
39. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
endosymbiont hypothesis
metabolism
cell wall
mutation
40. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER
ribosomes
ovules
mitochondria
metaphase
41. Formed when cell membrane surrounds a molecule outside the cell and ingests it
cell membrane
endocytic vesicles
perennial
chromatids
42. 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
centromere
transformation
carbon dioxide fixation
endoplasmic reticulum
43. Small structures in the cytoplasm of a cell that do special jobs
cell wall
transcription
organelles
centrioles
44. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
inhibitor
cofactor
crossing over
cell cycle
45. A cell having two sets of chromosomes or twice the haploid number
substrate
mutation
diploid
anabolism
46. Green pigment contained in the grana
electron transport
tonoplast
virus
chlorophyll
47. Proteins that act as biological catalysts
nuclear pores
enzymes
electron transport
stamen
48. Pores which allows materials to move in and out of the cell nucleus
post-transcriptional processing
telophase
nuclear pores
annuals
49. Change in a DNA sequence that affects genetic information
mitosis
biennial
lysosomes
mutation
50. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
krebs cycle
biosynthesis
gene
shoot apex
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