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BIOL 150 Principles of Biology Study Guide for Exam I - Dr. MA Kassem I. Fill in the blanks questions. 1. Lipids (triglycerides) are made of: __________________________ +_____________________________. 2. The nucleic acids (DNA) is made of: ________________+ ________________+_____________________. 3. Proteins are made of: ___________________________________________________________________. 4. Starch (also Glycogen) is made of: _________________________________________________________. 5. Cell membranes are composed of proteins and ______________________________________________. 6. A molecule with the formula C5H10O5 is probably a _________________________________________. II. Multiple choice questions. 7. Which one of the following lists the four bases contained in DNA? a. cytosine, guanine, thymine, uracil b. adenine, guanine, uracil, thymine c. guanine, pyroline, thymine, uracil d. adenine, guanine, purine, thymine e. adenine, guanine, cytosine, thymine 8. Which one of the following describes a nucleotide most completely? a. a sugar and a phosphate group only b. nitrogen base and a sugar only c. nitrogen base, a sugar, and a phosphate group d. a sugar and a pyrimidine e. a sugar and a purine 9. Which one of the following accurately reflects complementary base pairing in the DNA molecule? a. guanine–cytosine b. guanine–adenine c. cytosine–thymine d. uracil–thymine e. adenine–cytosine 10. Which cellular organelle is required for photosynthesis in eukaryotic cells? a. chloroplast b. lysosome c. mitochondrion d. nucleus e. golgi apparatus III. True/False questions. 11. 12. 13. 14. 15. All eukaryotic cells do have a cell membrane. Prokaryotic cells have a nucleus. Plant cells differ from animal cells by the fact that they possess a large central vacuole. Isotopes always have the same numbers of neutrons. Isotopes have the same numbers of electrons. IV. Essay Questions. 16. 17. 18. Compare and contrast eukaryotic and prokaryotic cells. Compare and contrast plant and animal cells. Discuss at length the process of protein synthesis.