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






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






3. Change in a DNA sequence that affects genetic information






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






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






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






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






8. Stores - packages and ships proteins






9. Plants that grow year after year






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






11. The complete genetic material contained in an individual






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






13. The stalk of a stamen that supports the anther






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






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






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






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






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






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






20. Cell division which produces two identical cells






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






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






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






24. Used to examine tiny cell organelles






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






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






27. Production of a chemical compound by a living organism






28. A substance that retards or stops enzymatic activity






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






30. 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






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






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






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






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






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






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






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






38. Composed of a bilayer of lipids embedded with globular proteins






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






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






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






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






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






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






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






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






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






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






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






50. Green pigment contained in the grana