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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. Process by which a cell releases large amounts of material






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






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






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






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






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






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






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






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






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






11. The stalk of a stamen that supports the anther






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






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






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






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






16. The part of the stamen that contains pollen






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






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






19. Area where the chromatids of a chromosome are attached






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






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






22. Consists of DNA tightly coiled around proteins






23. Classification of plant which survives only a single season






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






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






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






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






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






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






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






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






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






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






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






35. The complete genetic material contained in an individual






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






37. Vacuole membrane






38. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






45. Different forms of a gene






46. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)






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






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






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






50. Production of a chemical compound by a living organism