Practice_Midterm_II_A

Practice_Midterm_II_A - Version A MCDB 1A Summer 2007 Name...

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Version A MCDB 1A Summer 2007 Name 1. Which of the following statements about prokaryotes and eukaryotes is FALSE? A) Eukaryotes have a nucleus whereas prokaryotes do not. B) Prokaryotes are always unicellular whereas eukaryotes can be unicellular or multicellular. C) Both prokaryotes and eukaryotes have internal nuclear envelopes. D) Eukaryotes are large compared to prokaryotes. E) Both prokaryotes and eukaryotes can have flagellae. 2. What is the smallest unit of life? A) DNA B) a cell C) a ribosome D) a protein E) an amino acid 3. Cells are so small because they A) are limited by diffusion. B) are limited by available resources. C) were created by division of pre-existing cells. D) have small organelles. E) must have a low surface area-to-volume ratio. 4. An animal cell has a ___ while a plant cell has ___. A) nucleus; no nucleus B) cytoskeleton; motile flagella C) rough endoplasmic endoderm (ER); only a smooth ER D) mitochondria; no mitochondria since it only has chloroplasts E) plasma membrane; a plasma membrane and a cell wall. 6. The organelle responsible for the synthesis of proteins created for secretion or the membrane is the A) Golgi apparatus. B) lysosome. C) nucleolus. D) endoplasmic reticulum. E) mitochondria. 7. The nuclear envelope, which comprises the inner and outer membrane of the nucleus, is continuous with the A) Golgi apparatus. B) lysosome. C) nucleolus. D) endoplasmic reticulum. E) mitochondria. 8. Which of the following is NOT true of mitochondria? A) There can be one or many per cell. B) They are bound by a double membrane, having both an inner and outer membrane. C) They are believed to originate from large engulfed eukaryotes. D) They have “shelf-like” structures called cristae. E) They produce most of the cell’s ATP. 9. Plant cell vacuoles do all of the following EXCEPT: A) Store toxic waste materials. B) Store food and nutrients. C) Provide stiffness to support the cell. D) Produce energy (ATP) for the cell. E) Plant cell vacuoles do all of the above. 10. What features does a chloroplast have? A) Stacks of membrane called grana, made of individual sacks called thylakoids. B) A double membrane.
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Practice_Midterm_II_A - Version A MCDB 1A Summer 2007 Name...

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