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 part of an enzyme where the chemical reaction occurs






2. A substance that retards or stops enzymatic activity






3. Different forms of a gene






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






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






6. 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)






7. Cell division which produces two identical cells






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






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






10. The final stage of mitosis or meiosis - during which a nuclear membrane forms around each set of new chromosomes






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






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






13. Proteins that act as biological catalysts






14. Stores - packages and ships proteins






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






16. Change in a DNA sequence that affects genetic information






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






18. Used to examine tiny cell organelles






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






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






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






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






23. Consists of DNA tightly coiled around proteins






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






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






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






27. Classification of plant whose life cycle survives two seasons






28. The part of the stamen that contains pollen






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






30. Body of a chloroplast containing grana






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






32. The complete genetic material contained in an individual






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






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






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






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






37. A cell having only one complete set of chromosomes






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






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






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






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






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






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






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. Production of a chemical compound by a living organism






47. The stalk of a stamen that supports the anther






48. Projections on cell membrane increase surface area






49. Plants that grow year after year






50. Matching Chromosomes that are similar but not identical