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






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






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






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






5. Consists of DNA tightly coiled around proteins






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






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






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






9. Matching Chromosomes that are similar but not identical






10. Classification of plant whose life cycle survives two seasons






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






12. Plants that grow year after year






13. Used to examine tiny cell organelles






14. Classification of plant which survives only a single season






15. The stalk of a stamen that supports the anther






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






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






18. Structure within ovary of plant that contains egg cells






19. Stalk that supports the flower






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






21. Different forms of a gene






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






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






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






25. The complete genetic material contained in an individual






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






27. Breakdown of more complex substances into simpler ones with release of energy






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






29. The part of the stamen that contains pollen






30. Production of a chemical compound by a living organism






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






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






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






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






35. Living thing






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






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






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






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






40. Smallest unit of most living things






41. The substance acted upon by an enzyme






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






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






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






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






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






47. Proteins that act as biological catalysts






48. Vacuole membrane






49. Change in a DNA sequence that affects genetic information






50. Cells that lack a membrane-bound nucleus and membrane-bound organelles