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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. Modification of a cell by the incorporation of exogenous DNA






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






3. Vacuole membrane






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






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






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






7. Body of a chloroplast containing grana






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






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






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






11. Smallest unit of most living things






12. Area where the chromatids of a chromosome are attached






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






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






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






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






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






18. Plants that grow year after year






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






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






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






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






23. Structure within ovary of plant that contains egg cells






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






25. The substance acted upon by an enzyme






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






27. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






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






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






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






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






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






40. A substance that retards or stops enzymatic activity






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






42. Production of a chemical compound by a living organism






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






44. Living thing






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






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






47. 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






48. Different forms of a gene






49. Change in a DNA sequence that affects genetic information






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