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






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






3. Living thing






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






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






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






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






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






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






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






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






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






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






14. Body of a chloroplast containing grana






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






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






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






18. The complete genetic material contained in an individual






19. 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)






20. Structure within ovary of plant that contains egg cells






21. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






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






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






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






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






32. Vacuole membrane






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






34. 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






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






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






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






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






39. The substance acted upon by an enzyme






40. The stalk of a stamen that supports the anther






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






42. Smallest unit of most living things






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






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






45. Sequence of DNA that codes for a protein and thus determines a trait






46. Classification of plant whose life cycle survives two seasons






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






48. Area where the chromatids of a chromosome are attached






49. Production of a chemical compound by a living organism






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