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






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






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






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






5. Used to examine tiny cell organelles






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






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






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






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






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






11. Stalk that supports the flower






12. A cell having only one complete set of chromosomes






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






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






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






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






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






18. A substance that must join with the enzyme to enable it to fit the substrate






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






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






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






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






23. Smallest unit of most living things






24. The part of the stamen that contains pollen






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






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






27. The complete genetic material contained in an individual






28. Cell division which produces two identical cells






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






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






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






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






33. Production of a chemical compound by a living organism






34. Plants that grow year after year






35. Green pigment contained in the grana






36. 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)






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






38. Change in a DNA sequence that affects genetic information






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






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






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






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






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






44. Stores - packages and ships proteins






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






46. Structure within ovary of plant that contains egg cells






47. Body of a chloroplast containing grana






48. Matching Chromosomes that are similar but not identical






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






50. Classification of plant which survives only a single season