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






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






3. Production of a chemical compound by a living organism






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






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






6. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






14. Change in a DNA sequence that affects genetic information






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






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






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






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






19. Vacuole membrane






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






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






22. Reproductive cells - have only half the number of chromosomes






23. Smallest unit of most living things






24. The complete genetic material contained in an individual






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






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






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






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






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






30. Cell division which produces two identical cells






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






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






33. Matching Chromosomes that are similar but not identical






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






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






36. Modification of a cell by the incorporation of exogenous DNA






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






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






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






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






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






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






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






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






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






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






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






48. Structure within ovary of plant that contains egg cells






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






50. Classification of plant whose life cycle survives two seasons