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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. The part of the stamen that contains pollen






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






3. Used to examine tiny cell organelles






4. Plants that grow year after year






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






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






7. Change in a DNA sequence that affects genetic information






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






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






10. A substance that retards or stops enzymatic activity






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






12. Projections on cell membrane increase surface area






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






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






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






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






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






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






19. A cell having only one complete set of chromosomes






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






21. Classification of plant whose life cycle survives two seasons






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






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






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






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






26. Structure within ovary of plant that contains egg cells






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






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






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






30. 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






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






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






33. Different forms of a gene






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






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






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






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






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






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






40. Photosynthetic reaction in which carbon dioxide is attached to an organic compound (glucose - polysaccharides)






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






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






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






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






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






46. Matching Chromosomes that are similar but not identical






47. 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)






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






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






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







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