Test your basic knowledge |

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. Plants that grow year after year






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






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






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






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






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






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






8. Projections on cell membrane increase surface area






9. Stores - packages and ships proteins






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






11. The substance acted upon by an enzyme






12. The part of the stamen that contains pollen






13. Proteins that act as biological catalysts






14. Green pigment contained in the grana






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






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






17. Smallest unit of most living things






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






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






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






21. The stalk of a stamen that supports the anther






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






23. Structure within ovary of plant that contains egg cells






24. Classification of plant which survives only a single season






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






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






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






28. Different forms of a gene






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






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






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






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






33. A substance that retards or stops enzymatic activity






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






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






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






37. 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






38. Consists of DNA tightly coiled around proteins






39. The second phase of mitosis - during which the chromosomes line up across the center of the cell






40. The complete genetic material contained in an individual






41. 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)






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






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






44. Change in a DNA sequence that affects genetic information






45. Living thing






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






47. Production of a chemical compound by a living organism






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






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






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