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






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






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






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






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






6. Cell division which produces two identical cells






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






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






9. Green pigment contained in the grana






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






11. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






19. Classification of plant which survives only a single season






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






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






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






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






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






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






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






27. Structure within ovary of plant that contains egg cells






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






30. The part of the stamen that contains pollen






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






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






33. Smallest unit of most living things






34. The organic process whereby the DNA sequence in a gene is copied into mRNA






35. Stores - packages and ships proteins






36. Living thing






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






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






39. Plants that grow year after year






40. Matching Chromosomes that are similar but not identical






41. Classification of plant whose life cycle survives two seasons






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






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






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






45. The complete genetic material contained in an individual






46. Change in a DNA sequence that affects genetic information






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






48. The substance acted upon by an enzyme






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






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