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






2. Smallest unit of most living things






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






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






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






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






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






8. Classification of plant whose life cycle survives two seasons






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






10. 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)






11. The substance acted upon by an enzyme






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






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






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






15. Living thing






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






17. Used to examine tiny cell organelles






18. Change in a DNA sequence that affects genetic information






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






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






21. Plants that grow year after year






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






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






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






25. Proteins that act as biological catalysts






26. The complete genetic material contained in an individual






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






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






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






30. Vacuole membrane






31. Body of a chloroplast containing grana






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






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






34. A substance that retards or stops enzymatic activity






35. The stalk of a stamen that supports the anther






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






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






38. The part of the stamen that contains pollen






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






40. Production of a chemical compound by a living organism






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






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






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






44. Classification of plant which survives only a single season






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






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






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






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






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






50. Different forms of a gene