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. The substance acted upon by an enzyme






2. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes






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






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






5. Consists of DNA tightly coiled around proteins






6. Cells that lack a membrane-bound nucleus and membrane-bound organelles






7. 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)






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






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






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






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






12. The stalk of a stamen that supports the anther






13. Packaged protein or other substance produced by golgi apparatus/endoplasmic reticulum






14. The process whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm through tRNA






15. Division of the cytoplasm during cell division - new cell is formed






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






17. Structure within ovary of plant that contains egg cells






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






19. The complete genetic material contained in an individual






20. Modification of a cell by the incorporation of exogenous DNA






21. The regular sequence of growth and division that cells undergo






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






23. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix






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






25. 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






26. Cell division which produces two identical cells






27. The part of an enzyme where the chemical reaction occurs






28. Disk-like plates which are the site of photosynthesis in chloroplasts






29. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.






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






31. Classification of plant whose life cycle survives two seasons






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






33. Formed when cell membrane surrounds a molecule outside the cell and ingests it






34. Classification of plant which survives only a single season






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






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






37. Small structures in the cytoplasm of a cell that do special jobs






38. Process by which a cell releases large amounts of material






39. Strong layer around the cell membrane in plants - algae - and some bacteria made of cellulose and lignin






40. The part of the stamen that contains pollen






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






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






43. Smallest unit of most living things






44. Pores which allows materials to move in and out of the cell nucleus






45. A substance that retards or stops enzymatic activity






46. Vacuole membrane






47. Membrane-bound organelle that stores water and soluble substances






48. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid






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






50. Matching Chromosomes that are similar but not identical