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. Body of a chloroplast containing grana






2. Smallest unit of most living things






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






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






5. A substance that retards or stops enzymatic activity






6. Vacuole membrane






7. Production of a chemical compound by a living organism






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






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






10. Area where the chromatids of a chromosome are attached






11. Used to examine tiny cell organelles






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






13. Powerhouse of the cell - organelle that is the site of ATP (energy) production






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






15. Matching Chromosomes that are similar but not identical






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






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






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






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






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






21. Consists of DNA tightly coiled around proteins






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






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






24. The substance acted upon by an enzyme






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






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






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






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






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






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






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






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






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






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






35. Stores - packages and ships proteins






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






37. Proteins that act as biological catalysts






38. Different forms of a gene






39. 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






40. Green pigment contained in the grana






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






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






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






44. Cell division which produces two identical cells






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






46. Plants that grow year after year






47. Living thing






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






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






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