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






2. Cell division which produces two identical cells






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






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






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






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






7. Consists of DNA tightly coiled around proteins






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






9. The part of the stamen that contains pollen






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






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






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






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






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






15. Classification of plant whose life cycle survives two seasons






16. Body of a chloroplast containing grana






17. Living thing






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






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






20. Stores - packages and ships proteins






21. Vacuole membrane






22. Green pigment contained in the grana






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






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






25. The process of transfering genetic material from one cell to another






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






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






28. Stalk that supports the flower






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






30. Different forms of a gene






31. A substance that retards or stops enzymatic activity






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






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






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






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






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






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






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






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






40. 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)






41. Smallest unit of most living things






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






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






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






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






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






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






48. Area where the chromatids of a chromosome are attached






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






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