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






2. The stalk of a stamen that supports the anther






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






4. A cell having two sets of chromosomes or twice the haploid number






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






6. The part of the stamen that contains pollen






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






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






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






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






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






12. The complete genetic material contained in an individual






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






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






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






16. 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






17. A substance that retards or stops enzymatic activity






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






19. 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)






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






21. The first stage of mitosis - forming spindle fibres attached to the centromere






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






23. Cell organelle filled with enyzmes need to break down certain materials in the cells






24. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis






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






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






27. Vacuole membrane






28. The substance acted upon by an enzyme






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






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






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






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






33. Cell division which produces two identical cells






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






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






36. Living thing






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






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






39. Plants that grow year after year






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






41. Classification of plant which survives only a single season






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






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






44. Different forms of a gene






45. Production of a chemical compound by a living organism






46. Structure within ovary of plant that contains egg cells






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






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






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






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