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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. Classification of plant whose life cycle survives two seasons






2. The part of the stamen that contains pollen






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






4. Structure within ovary of plant that contains egg cells






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






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






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






8. Vacuole membrane






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






10. Stores - packages and ships proteins






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






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






13. Process of building up complex materials (proteins) from simple materials






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






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






16. The substance acted upon by an enzyme






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






18. Living thing






19. Cell division which produces two identical cells






20. Site of protein synthesis. Free ribosomes - float unattached; attached ribosomes - attached to the ER






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






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






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






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






25. A substance that retards or stops enzymatic activity






26. Stalk that supports the flower






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






28. Membrane-bound organelle that stores water and soluble substances






29. Projections on cell membrane increase surface area






30. 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)






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






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






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






34. Body of a chloroplast containing grana






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






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






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






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






39. The complete genetic material contained in an individual






40. The stalk of a stamen that supports the anther






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






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






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






44. Plants that grow year after year






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






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






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






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






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






50. Different forms of a gene