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. Classification of plant whose life cycle survives two seasons






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






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






4. Structure within ovary of plant that contains egg cells






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






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






7. A cell having only one complete set of chromosomes






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






9. The stalk of a stamen that supports the anther






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






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






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






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






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






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






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






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






18. The part of the stamen that contains pollen






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






20. 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)






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






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






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






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






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






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






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






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






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






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






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






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






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






34. Stores - packages and ships proteins






35. A substance that retards or stops enzymatic activity






36. The complete genetic material contained in an individual






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






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






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






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






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






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






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






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






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






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






47. Matching Chromosomes that are similar but not identical






48. Smallest unit of most living things






49. Area where the chromatids of a chromosome are attached






50. Disk-like plates which are the site of photosynthesis in chloroplasts