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






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






3. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






10. 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






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






12. Used to examine tiny cell organelles






13. Body of a chloroplast containing grana






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






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






16. A substance that retards or stops enzymatic activity






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






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






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






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






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






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






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






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






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






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






27. Production of a chemical compound by a living organism






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






29. Living thing






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






31. Cell division which produces two identical cells






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






33. Structure within ovary of plant that contains egg cells






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






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






36. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






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






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






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






47. Area where the chromatids of a chromosome are attached






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






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






50. Proteins that act as biological catalysts