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






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






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






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






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






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






7. Stores - packages and ships proteins






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






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






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






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






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






13. Stalk that supports the flower






14. Projections on cell membrane increase surface area






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






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






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






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






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






20. A substance that retards or stops enzymatic activity






21. Change in a DNA sequence that affects genetic information






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






23. Consists of DNA tightly coiled around proteins






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






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






26. Structure within ovary of plant that contains egg cells






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






28. Cell division which produces two identical cells






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






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






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






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






33. Classification of plant whose life cycle survives two seasons






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






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






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






37. Vacuole membrane






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






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






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






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






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






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






44. 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)






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






46. Proteins that act as biological catalysts






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






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






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






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