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. The part of the stamen that contains pollen






2. A substance that retards or stops enzymatic activity






3. Living thing






4. Different forms of a gene






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






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






7. 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)






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






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






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






11. Stalk that supports the flower






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






13. Classification of plant whose life cycle survives two seasons






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






15. Vacuole membrane






16. Production of a chemical compound by a living organism






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






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






19. Used to examine tiny cell organelles






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






21. Projections on cell membrane increase surface area






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






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






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






25. Stores - packages and ships proteins






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






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






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






29. 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






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






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






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






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






34. Body of a chloroplast containing grana






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






36. Smallest unit of most living things






37. The stalk of a stamen that supports the anther






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






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






40. A cell having only one complete set of chromosomes






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






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






43. Green pigment contained in the grana






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






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






47. Plants that grow year after year






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






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






50. The substance acted upon by an enzyme