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. Area where the chromatids of a chromosome are attached






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






3. The complete genetic material contained in an individual






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






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






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






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






8. Smallest unit of most living things






9. A substance that retards or stops enzymatic activity






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






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






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






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






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






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






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






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






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






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






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






21. Classification of plant whose life cycle survives two seasons






22. Classification of plant which survives only a single season






23. Consists of DNA tightly coiled around proteins






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






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






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






27. The substance acted upon by an enzyme






28. Cell organelle filled with enyzmes need to break down certain materials in the cells






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






30. Matching Chromosomes that are similar but not identical






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






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






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






34. Production of a chemical compound by a living organism






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






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






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






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






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






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






41. Different forms of a gene






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






43. Plants that grow year after year






44. The part of the stamen that contains pollen






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






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






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






48. Green pigment contained in the grana






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






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