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






2. A substance that retards or stops enzymatic activity






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






4. Stalk that supports the flower






5. Consists of DNA tightly coiled around proteins






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






7. Different forms of a gene






8. Plants that grow year after year






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






10. The complete genetic material contained in an individual






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






12. A cell having only one complete set of chromosomes






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






14. Smallest unit of most living things






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






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






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






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






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






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






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






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






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






24. Cell division which produces two identical cells






25. Living thing






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






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






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






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






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






31. Structure within ovary of plant that contains egg cells






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






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






34. Used to examine tiny cell organelles






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






36. The substance acted upon by an enzyme






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






38. Stores - packages and ships proteins






39. Body of a chloroplast containing grana






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






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






42. Matching Chromosomes that are similar but not identical






43. Production of a chemical compound by a living organism






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






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






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






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






48. Proteins that act as biological catalysts






49. Projections on cell membrane increase surface area






50. Classification of plant which survives only a single season