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






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






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






4. Area where the chromatids of a chromosome are attached






5. Used to examine tiny cell organelles






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






7. Production of a chemical compound by a living organism






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






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






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






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






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






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






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






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






16. The substance acted upon by an enzyme






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






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






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






20. Smallest unit of most living things






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






22. 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)






23. Classification of plant whose life cycle survives two seasons






24. A substance that must join with the enzyme to enable it to fit the substrate






25. The complete genetic material contained in an individual






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






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






28. Tubes - One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division.






29. Classification of plant which forms seeds inside a protective chamber called an ovary - inside a flower






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






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






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






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






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






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






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






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






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






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






40. Classification of plant which survives only a single season






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






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






43. Green pigment contained in the grana






44. Proteins that act as biological catalysts






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






46. Cell division which produces two identical cells






47. Consists of DNA tightly coiled around proteins






48. Living thing






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






50. The part of the stamen that contains pollen