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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. Composed of a bilayer of lipids embedded with globular proteins






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






3. Body of a chloroplast containing grana






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






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






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






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






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






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






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






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






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






13. Green pigment contained in the grana






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






15. Vacuole membrane






16. The stalk of a stamen that supports the anther






17. A substance that retards or stops enzymatic activity






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






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






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






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






22. 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






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






24. Matching Chromosomes that are similar but not identical






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






26. Consists of DNA tightly coiled around proteins






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






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






29. Proteins that act as biological catalysts






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






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






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






33. Different forms of a gene






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






35. Living thing






36. Area where the chromatids of a chromosome are attached






37. Smallest unit of most living things






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






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






40. Cell division which produces two identical cells






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






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






43. Classification of plant whose life cycle survives two seasons






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






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






46. Stalk that supports the flower






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






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






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






50. Plants that grow year after year