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






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






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






4. A substance that retards or stops enzymatic activity






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






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






7. Passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane






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






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






10. Cell division which produces two identical cells






11. Change in a DNA sequence that affects genetic information






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






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






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






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






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






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






18. Stage of cellular respiration that finishes the breakdown of pyruvic acid molecules to carbon dioxide - releasing energy






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






20. Projections on cell membrane increase surface area






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






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






23. A cell having only one complete set of chromosomes






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






25. Vacuole membrane






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






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






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






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






30. Stalk that supports the flower






31. Matching Chromosomes that are similar but not identical






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






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






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






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






36. Living thing






37. Structure within ovary of plant that contains egg cells






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






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






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






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






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






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






46. Classification of plant whose life cycle survives two seasons






47. The part of the stamen that contains pollen






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






49. Used to examine tiny cell organelles






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