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






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






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






4. Living thing






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






6. Different forms of a gene






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






8. Change in a DNA sequence that affects genetic information






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






10. Vacuole membrane






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






12. Matching Chromosomes that are similar but not identical






13. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes






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






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






16. Area where the chromatids of a chromosome are attached






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






18. The complete genetic material contained in an individual






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






20. Production of a chemical compound by a living organism






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






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






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






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






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






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






27. Used to examine tiny cell organelles






28. A cell having only one complete set of chromosomes






29. 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)






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






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






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






33. Consists of DNA tightly coiled around proteins






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






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






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






37. The second phase of mitosis - during which the chromosomes line up across the center of the cell






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






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






40. A substance that retards or stops enzymatic activity






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






42. The substance acted upon by an enzyme






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






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






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






46. Cell division which produces two identical cells






47. Classification of plant which survives only a single season






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






49. The stalk of a stamen that supports the anther






50. Smallest unit of most living things