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






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






3. Vacuole membrane






4. Green pigment contained in the grana






5. Area where the chromatids of a chromosome are attached






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






7. 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)






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






9. Living thing






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






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






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






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






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






15. The part of the stamen that contains pollen






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






17. Consists of DNA tightly coiled around proteins






18. Smallest unit of most living things






19. Different forms of a gene






20. Used to examine tiny cell organelles






21. Production of a chemical compound by a living organism






22. Proteins that act as biological catalysts






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






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






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






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






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






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






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






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






31. Structure within ovary of plant that contains egg cells






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






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






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






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






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






37. The substance acted upon by an enzyme






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






39. Classification of plant which survives only a single season






40. A substance that retards or stops enzymatic activity






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






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






43. Plants that grow year after year






44. A cell having only one complete set of chromosomes






45. Projections on cell membrane increase surface area






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






47. Small structures in the cytoplasm of a cell that do special jobs






48. Classification of plant whose life cycle survives two seasons






49. Change in a DNA sequence that affects genetic information






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