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






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






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






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






5. Vacuole membrane






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






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






8. Consists of DNA tightly coiled around proteins






9. A cell having only one complete set of chromosomes






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






11. Anaerobic cellular respiration in which pyruvic acid is broken down into end products such as lactic acid






12. Classification of plant whose life cycle survives two seasons






13. Production of a chemical compound by a living organism






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






15. 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)






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






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






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






19. 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






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






21. Classification of plant which survives only a single season






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






23. Stores - packages and ships proteins






24. Cell division which produces two identical cells






25. Living thing






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






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






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






29. Smallest unit of most living things






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






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






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






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






34. The part of the stamen that contains pollen






35. Used to examine tiny cell organelles






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






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






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






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






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






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






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






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






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






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






46. Matching Chromosomes that are similar but not identical






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






48. Change in a DNA sequence that affects genetic information






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






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