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






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






3. Consists of DNA tightly coiled around proteins






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






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






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






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






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






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






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






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






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






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






14. Cells that lack a membrane-bound nucleus and membrane-bound organelles






15. Change in a DNA sequence that affects genetic information






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






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






18. Different forms of a gene






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






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






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






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






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






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






25. A substance that retards or stops enzymatic activity






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






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






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






29. Vacuole membrane






30. The substance acted upon by an enzyme






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






32. Projections on cell membrane increase surface area






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






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






35. Classification of plant which survives only a single season






36. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid






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






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






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






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






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






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






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






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






45. 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)






46. Proteins that act as biological catalysts






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






48. Green pigment contained in the grana






49. Body of a chloroplast containing grana






50. The stalk of a stamen that supports the anther