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






2. Projections on cell membrane increase surface area






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






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






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






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






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






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






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






10. 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)






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






12. Vacuole membrane






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






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






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






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






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






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






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






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






21. Body of a chloroplast containing grana






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






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






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






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






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






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






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






29. Matching Chromosomes that are similar but not identical






30. Change in a DNA sequence that affects genetic information






31. Stores - packages and ships proteins






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






33. A period during which the cell grows - G1 - copies its DNA - S - and synthesizes proteins - G2






34. 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






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






36. A cell having only one complete set of chromosomes






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






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






39. The stalk of a stamen that supports the anther






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






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






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






43. Double-stranded chains of proteins which give structure to the cell






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






45. Used to examine tiny cell organelles






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






47. Proteins that act as biological catalysts






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






49. The part of the stamen that contains pollen






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