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 female part of a flower composed of ovary and style and stigma and ovules






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






3. Used to examine tiny cell organelles






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






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






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






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






8. 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






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






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






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






12. A substance that retards or stops enzymatic activity






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






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






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






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






17. Area where the chromatids of a chromosome are attached






18. The stalk of a stamen that supports the anther






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






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






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






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






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






24. The part of the stamen that contains pollen






25. Green pigment contained in the grana






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






27. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth






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






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






30. Smallest unit of most living things






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






32. 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)






33. Classification of plant whose life cycle survives two seasons






34. Plants that grow year after year






35. Consists of DNA tightly coiled around proteins






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






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






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






39. Vacuole membrane






40. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






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






48. A cell having only one complete set of chromosomes






49. Projections on cell membrane increase surface area






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