Test your basic knowledge |

CLEP Natural Science

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






2. Classification of plant whose life cycle survives two seasons






3. The part of the stamen that contains pollen






4. Particle made up of DNA - RNA - protein - and in some cases lipids that can only replicate only by infecting living cells






5. Matching Chromosomes that are similar but not identical






6. (adenosine triphosphate) main energy source that cells use for most of their work






7. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell






8. Used to examine tiny cell organelles






9. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration






10. The organ that bears the ovules of a flower - base of the pistil






11. Cell division that produces reproductive cells in sexually reproducing organisms






12. Reproductive cells - have only half the number of chromosomes






13. The male reproductive organ of a flower consisting of anther - filament - and pollen






14. Production of a chemical compound by a living organism






15. Area where the chromatids of a chromosome are attached






16. The second phase of mitosis - during which the chromosomes line up across the center of the cell






17. The organic process whereby the DNA sequence in a gene is copied into mRNA






18. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER






19. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane






20. Stalk that supports the flower






21. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes






22. Living thing






23. Plants that grow year after year






24. Sticky portion at the top of the style which traps pollen






25. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy






26. Three-nucleotide sequence on messenger RNA that codes for a single amino acid






27. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth






28. A substance that must join with the enzyme to enable it to fit the substrate






29. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2






30. Has a nucleus - has organelles or other cell parts






31. Sequence of DNA that codes for a protein and thus determines a trait






32. A substance that retards or stops enzymatic activity






33. The female part of a flower composed of ovary and style and stigma and ovules






34. Theory which suggests mitochondria and chloroplasts were once prokaryotic organisms in a symbiotic relationship with eykorytic cells






35. Composed of a bilayer of lipids embedded with globular proteins






36. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site






37. Transport of a substance across a cell membrane against the concentration gradient






38. Stores - packages and ships proteins






39. Smallest unit of most living things






40. Change in a DNA sequence that affects genetic information






41. Consists of DNA tightly coiled around proteins






42. Bead-like structure in chromatin - composed of a short length of DNA wrapped around a core of histone proteins






43. The process of transfering genetic material from one cell to another






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)






45. Body of a chloroplast containing grana






46. The stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle






47. Have tissues made of cells that transport water and nutrients throughout the plant






48. Breakdown of more complex substances into simpler ones with release of energy






49. Provides structural support to a cell composed of microtubules - microfilaments - centrioles






50. The substance acted upon by an enzyme