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. Area where the chromatids of a chromosome are attached






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






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






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






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






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






7. A cell having only one complete set of chromosomes






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






9. The stalk of a stamen that supports the anther






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






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






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






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






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






15. 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






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






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






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






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






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






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






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






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






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






25. Matching Chromosomes that are similar but not identical






26. Plants that grow year after year






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






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






29. Used to examine tiny cell organelles






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






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






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






33. Body of a chloroplast containing grana






34. Vacuole membrane






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






36. Structure within ovary of plant that contains egg cells






37. The complete genetic material contained in an individual






38. Production of a chemical compound by a living organism






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






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






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






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






43. Living thing






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






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






46. The substance acted upon by an enzyme






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






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






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






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