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






2. Projections on cell membrane increase surface area






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






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






5. Vacuole membrane






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






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






8. The substance acted upon by an enzyme






9. Classification of plant which survives only a single season






10. Hollow tubes of protein about 25 nanometers in diameter - support the cell and moves organelles within the cell






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






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






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






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






15. Plants that grow year after year






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






17. 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






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






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






20. Green pigment contained in the grana






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






22. Matching Chromosomes that are similar but not identical






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






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






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






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






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






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






29. Cell division which produces two identical cells






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






31. Proteins that act as biological catalysts






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






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






34. Used to examine tiny cell organelles






35. Different forms of a gene






36. A substance that retards or stops enzymatic activity






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






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






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






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






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






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






43. Classification of plant whose life cycle survives two seasons






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






45. Stalk that supports the flower






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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