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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. Reproductive cells - have only half the number of chromosomes






2. The part of the stamen that contains pollen






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






4. Smallest unit of most living things






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






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






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






8. 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






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






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






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






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






13. Area where the chromatids of a chromosome are attached






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






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






16. Used to examine tiny cell organelles






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






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






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






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






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






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






23. Production of a chemical compound by a living organism






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






25. Stalk that supports the flower






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






27. The substance acted upon by an enzyme






28. 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)






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






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






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






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






33. The complete genetic material contained in an individual






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






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






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






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






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






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






40. Body of a chloroplast containing grana






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






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






43. Plants that grow year after year






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






45. Projections on cell membrane increase surface area






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






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






48. Cell division that produces reproductive cells in sexually reproducing organisms






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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