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






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






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






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






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






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






7. Classification of plant whose life cycle survives two seasons






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






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






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






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






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






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






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






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






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






17. 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)






18. Change in a DNA sequence that affects genetic information






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






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






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






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






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






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






25. Consists of DNA tightly coiled around proteins






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






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






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






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






30. The substance acted upon by an enzyme






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






32. Area where the chromatids of a chromosome are attached






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






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






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






36. Living thing






37. Proteins that act as biological catalysts






38. Stalk that supports the flower






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






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






41. Structure within ovary of plant that contains egg cells






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






43. Vacuole membrane






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






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






46. Cell division which produces two identical cells






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






48. Body of a chloroplast containing grana






49. Stores - packages and ships proteins






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