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. Smallest unit of most living things






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






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






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






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






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






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






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






9. Sticky portion at the top of the style which traps pollen






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






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






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






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






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






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






16. Stalk that supports the flower






17. Production of a chemical compound by a living organism






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






19. The part of the stamen that contains pollen






20. Part of stem where growth occurs - contains meristem tissue that is capable of quick growth






21. Body of a chloroplast containing grana






22. Cell division which produces two identical cells






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






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






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






26. Classification of plant which survives only a single season






27. Green pigment contained in the grana






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






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






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






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






32. Structure within ovary of plant that contains egg cells






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






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






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






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






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






38. A substance that retards or stops enzymatic activity






39. Plants that grow year after year






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






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






42. Projections on cell membrane increase surface area






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






44. Consists of DNA tightly coiled around proteins






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






46. Area where the chromatids of a chromosome are attached






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






48. Change in a DNA sequence that affects genetic information






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






50. Matching Chromosomes that are similar but not identical