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






2. Used to examine tiny cell organelles






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






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






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






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






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






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






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






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






11. Classification of plant which survives only a single season






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






13. Smallest unit of most living things






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






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






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






17. Stalk that supports the flower






18. The substance acted upon by an enzyme






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






20. The stalk of a stamen that supports the anther






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






22. Plants that grow year after year






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






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






25. The part of the stamen that contains pollen






26. Consists of DNA tightly coiled around proteins






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






28. Change in a DNA sequence that affects genetic information






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






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






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






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






33. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






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






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






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






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






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






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






46. Proteins that act as biological catalysts






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






48. Area where the chromatids of a chromosome are attached






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






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