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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. Consists of DNA tightly coiled around proteins






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






3. Matching Chromosomes that are similar but not identical






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






5. Change in a DNA sequence that affects genetic information






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






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






8. A cell having only one complete set of chromosomes






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






10. Area where the chromatids of a chromosome are attached






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






12. 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






13. The part of the stamen that contains pollen






14. Vacuole membrane






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






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






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






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






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






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






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






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






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






24. Cell division which produces two identical cells






25. Proteins that act as biological catalysts






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






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






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






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






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






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






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






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






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






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






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






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






38. The organ that bears the ovules of a flower - base of the pistil






39. The substance acted upon by an enzyme






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






41. The complete genetic material contained in an individual






42. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






50. Stores - packages and ships proteins