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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. Body of a chloroplast containing grana






2. Green pigment contained in the grana






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






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






5. First step in releasing the energy of glucose - in which a molecule of glucose is broken into two molecules of pyruvic acid






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






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






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






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






10. A non-protein - but organic - molecule (such as vitamin) that is covalently bound to an enzyme as part of the active site






11. Area where the chromatids of a chromosome are attached






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






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






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






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






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






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






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






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






20. Used to examine tiny cell organelles






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






22. Matching Chromosomes that are similar but not identical






23. 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)






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






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






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






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






28. Living thing






29. Smallest unit of most living things






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






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






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






33. Stores - packages and ships proteins






34. The substance acted upon by an enzyme






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






36. Vacuole membrane






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






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






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






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






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






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






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






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






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






46. Stalk that supports the flower






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






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






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






50. Classification of plant whose life cycle survives two seasons