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






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






3. The substance acted upon by an enzyme






4. A substance that retards or stops enzymatic activity






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






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






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






8. Consists of DNA tightly coiled around proteins






9. Classification of plant which survives only a single season






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






11. Body of a chloroplast containing grana






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






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






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






15. Used to examine tiny cell organelles






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






17. 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






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






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






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






21. Change in a DNA sequence that affects genetic information






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






23. Green pigment contained in the grana






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






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






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






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






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






29. The interchange of sections between pairing homologous chromosomes during the prophase of meiosis






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






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






32. In photosynthesis - this is the splitting of water by light






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






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






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






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






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






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






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






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






41. Area where the chromatids of a chromosome are attached






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






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






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






45. Stalk that supports the flower






46. 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)






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






48. Cell division which produces two identical cells






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






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