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. Used to examine tiny cell organelles






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






3. Proteins that act as biological catalysts






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






5. Modifications of pre-mRNA that make it into mature mRNA - so that it is ready for protein synthesis






6. Projections on cell membrane increase surface area






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






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






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






10. Stalk that supports the flower






11. Classification of plant whose life cycle survives two seasons






12. Change in a DNA sequence that affects genetic information






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






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






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






16. Different forms of a gene






17. Structure within ovary of plant that contains egg cells






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






19. The part of the stamen that contains pollen






20. In photosynthesis - this is the splitting of water by light






21. Classification of plant which survives only a single season






22. Living thing






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






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






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






26. Two identical chromosomes that split and contain the same genetic material






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






28. Stores - packages and ships proteins






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






30. Classication of plant which produce seeds which are 'naked' (in cones)






31. Process of building up complex materials (proteins) from simple materials






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






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






34. Matching Chromosomes that are similar but not identical






35. Small - dense region within most nuclei in which the assembly of RNA proteins begins






36. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid






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






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






39. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower






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






41. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)






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






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






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






45. Cell division which produces two identical cells






46. 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






47. A cell having only one complete set of chromosomes






48. 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)






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






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