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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. Body of a chloroplast containing grana
substrate
anabolism
endocytic vesicles
stroma
2. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site
codon
perennial
interphase
prosthetic group
3. Modification of a cell by the incorporation of exogenous DNA
lysosomes
metaphase
electron transport
transformation
4. Smallest unit of most living things
transformation
centromere
microfilaments
cell
5. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth
pistil
cofactor
shoot apex
nucleolus
6. Has a nucleus - has organelles or other cell parts
eukoryotic cells
reduction
gymnosperms
ovules
7. Living thing
perennial
cytoskeleton
mitochondria
organism
8. Three-nucleotide sequence on messenger RNA that codes for a single amino acid
anaphase
ribosomes
haploid
codon
9. Transport of a substance across a cell membrane against the concentration gradient
translation
interphase
active transport
grana
10. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.
codon
centrioles
cell cycle
chlorophyll
11. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid
crossing over
inhibitor
glycolysis
nuclear pores
12. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy
eukoryotic cells
krebs cycle
stroma
perennial
13. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane
facilitated diffusion
cofactor
cytokinesis
tonoplast
14. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
centrioles
metabolism
crossing over
prokaryotes
15. Production of a chemical compound by a living organism
biosynthesis
cytoskeleton
fermentation
cell membrane
16. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)
biosynthesis
codon
carbon dioxide fixation
DNA
17. Cells that lack a membrane-bound nucleus and membrane-bound organelles
prokaryotes
cristae
endocytic vesicles
shoot apex
18. Vacuole membrane
genome
krebs cycle
organism
tonoplast
19. Pores which allows materials to move in and out of the cell nucleus
biosynthesis
annuals
nuclear pores
vacuole
20. (adenosine triphosphate) main energy source that cells use for most of their work
endocytic vesicles
ATP
cofactor
krebs cycle
21. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells
endosymbiont hypothesis
DNA
gymnosperms
substrate
22. 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)
electron transport
homologs
ovary
meiosis
23. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum
pistil
metabolism
gymnosperms
secretory vesicles
24. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins
endocytic vesicles
genome
nucleosome
telophase
25. Projections on cell membrane increase surface area
DNA
endosymbiont hypothesis
carbon dioxide fixation
microvilli
26. Matching Chromosomes that are similar but not identical
homologs
cristae
electron transport
gene
27. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes
biennial
centromere
active site
telophase
28. Sequence of DNA that codes for a protein and thus determines a trait
metabolism
annuals
endocytic vesicles
gene
29. The substance acted upon by an enzyme
genome
gametes
substrate
mutation
30. Classication of plant which produce seeds which are 'naked' (in cones)
gymnosperms
transformation
inhibitor
golgi apparatus
31. Provides structural support to a cell composed of microtubules - microfilaments - centrioles
chromatin
gene
cristae
cytoskeleton
32. Process of building up complex materials (proteins) from simple materials
mitochondria
homologs
stigma
anabolism
33. Classification of plant which survives only a single season
nucleosome
annuals
DNA
tonoplast
34. Change in a DNA sequence that affects genetic information
mutation
post-transcriptional processing
cofactor
metabolism
35. A substance that retards or stops enzymatic activity
inhibitor
transformation
microfilaments
chromatids
36. Plants that grow year after year
chromatin
nucleosome
facilitated diffusion
perennial
37. Two identical chromosomes that split and contain the same genetic material
chromatids
microvilli
nucleolus
stamen
38. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower
endoplasmic reticulum
organelles
organism
angiosperms
39. Powerhouse of the cell - organelle that is the site of ATP (energy) production
glycolysis
lysosomes
stigma
mitochondria
40. Cell organelle filled with enyzmes need to break down certain materials in the cells
vascular plants
carbon dioxide fixation
metaphase
lysosomes
41. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis
ATP
fermentation
crossing over
substrate
42. The part of the stamen that contains pollen
organelles
anther
grana
active site
43. The first stage of mitosis - forming spindle fibres attached to the centromere
endoplasmic reticulum
homologs
prophase
chromatids
44. Disk-like plates which are the site of photosynthesis in chloroplasts
cytoskeleton
grana
microtubules
krebs cycle
45. A cell having only one complete set of chromosomes
tonoplast
glycolysis
haploid
endosymbiont hypothesis
46. Consists of DNA tightly coiled around proteins
endosymbiont hypothesis
anther
stamen
chromatin
47. The female part of a flower composed of ovary and style and stigma and ovules
homologs
prophase
cytoskeleton
pistil
48. Area where the chromatids of a chromosome are attached
meiosis
prokaryotes
centromere
diploid
49. The process of transfering genetic material from one cell to another
microtubules
perennial
vacuole
transduction
50. Have tissues made of cells that transport water and nutrients throughout the plant
filament
transduction
vascular plants
carbon dioxide fixation