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. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






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






9. Change in a DNA sequence that affects genetic information






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






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






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






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






14. The substance acted upon by an enzyme






15. Used to examine tiny cell organelles






16. A substance that retards or stops enzymatic activity






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






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






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






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






21. An internal membrane system in which components of cell membrane and some proteins are constructed. rough - instrumental in protein synthesis; smooth - processes lipids fats and steroids






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






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






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






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






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






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






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






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






30. Matching Chromosomes that are similar but not identical






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






32. Area where the chromatids of a chromosome are attached






33. Stores - packages and ships proteins






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






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






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






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






38. The complete genetic material contained in an individual






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






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






41. Living thing






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






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






44. Consists of DNA tightly coiled around proteins






45. Projections on cell membrane increase surface area






46. The part of the stamen that contains pollen






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






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






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






50. Body of a chloroplast containing grana