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






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






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






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






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






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






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






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






9. Stalk that supports the flower






10. Consists of DNA tightly coiled around proteins






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






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






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






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






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






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






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






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






19. Green pigment contained in the grana






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






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






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






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






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






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






26. Area where the chromatids of a chromosome are attached






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






28. 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)






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






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






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






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






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






34. A cell having only one complete set of chromosomes






35. Change in a DNA sequence that affects genetic information






36. Plants that grow year after year






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






38. Different forms of a gene






39. The substance acted upon by an enzyme






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






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






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






43. Matching Chromosomes that are similar but not identical






44. The part of the stamen that contains pollen






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






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






47. The complete genetic material contained in an individual






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






49. Proteins that act as biological catalysts






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