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






2. Reducing the ploidy level of nucleus from diploid to haploid in meiotic cell division






3. Structure within ovary of plant that contains egg cells






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






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






6. Classification of plant which survives only a single season






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






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






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






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






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






12. Proteins that act as biological catalysts






13. Cell division which produces two identical cells






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






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






16. Green pigment contained in the grana






17. The stalk of a stamen that supports the anther






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






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






20. Used to examine tiny cell organelles






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






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






23. 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)






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






25. A substance that retards or stops enzymatic activity






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






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






28. Classification of plant whose life cycle survives two seasons






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






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






31. Matching Chromosomes that are similar but not identical






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






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






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






35. Smallest unit of most living things






36. Double-stranded chains of proteins which give structure to the cell






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






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






39. Living thing






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






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






42. 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






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






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






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






46. Plants that grow year after year






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






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






49. Powerhouse of the cell - organelle that is the site of ATP (energy) production






50. Projections on cell membrane increase surface area