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 part of an enzyme where the chemical reaction occurs






2. Used to examine tiny cell organelles






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






4. Body of a chloroplast containing grana






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






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






7. Change in a DNA sequence that affects genetic information






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






9. The stalk of a stamen that supports the anther






10. Living thing






11. Classification of plant which survives only a single season






12. A cell having only one complete set of chromosomes






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






14. Numerous folds in the inner membrane of a mitochondrion - the site of cellular respiration






15. A substance that retards or stops enzymatic activity






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






17. The part of the stamen that contains pollen






18. Matching Chromosomes that are similar but not identical






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






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






21. Vacuole membrane






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






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






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






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






26. Cell division which produces two identical cells






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






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






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






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






31. The complete genetic material contained in an individual






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






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






34. Projections on cell membrane increase surface area






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






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






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






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






39. Proteins that act as biological catalysts






40. The substance acted upon by an enzyme






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






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






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






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






45. Different forms of a gene






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






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






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






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






50. 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)