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






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






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






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






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






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






7. Production of a chemical compound by a living organism






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






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






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






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






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






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






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






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






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






17. Matching Chromosomes that are similar but not identical






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






19. Area where the chromatids of a chromosome are attached






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






21. Stalk that supports the flower






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






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






24. Proteins that act as biological catalysts






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






26. Used to examine tiny cell organelles






27. Body of a chloroplast containing grana






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






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






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






31. Projections on cell membrane increase surface area






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






33. Different forms of a gene






34. Smallest unit of most living things






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






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






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






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






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






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






41. Living thing






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






43. Green pigment contained in the grana






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






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






46. Stores - packages and ships proteins






47. A substance that retards or stops enzymatic activity






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






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






50. Vacuole membrane