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. Matching Chromosomes that are similar but not identical






2. The complete genetic material contained in an individual






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






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






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






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






7. Stores - packages and ships proteins






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






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






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






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






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






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






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






15. The substance acted upon by an enzyme






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






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






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






19. A substance that retards or stops enzymatic activity






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






21. Area where the chromatids of a chromosome are attached






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






23. Cell division which produces two identical cells






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






25. Different forms of a gene






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






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






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






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






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






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






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






33. Body of a chloroplast containing grana






34. Projections on cell membrane increase surface area






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






36. Consists of DNA tightly coiled around proteins






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






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






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






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






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






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






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






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






45. Used to examine tiny cell organelles






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






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






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






49. Change in a DNA sequence that affects genetic information






50. Smallest unit of most living things