Science Unit 2 Exam QUESTIONS AND ANSWERS

Science Unit 2 Exam What are the differences between plant and animal cells? - Plants have cell wall, chloroplasts, and larger vacuoles Modern Cell Theory - Cell is smallest unit in organisms, all living things are made of cells, all cells come from other pre-existing cells What are the 2 cell types - prokaryotes and eukaryotes What are prokaryotes? - unicellular organisms that lack a nucleus like bacteria what are eukaryotes - cells with a nucleus (everything besides prokaryotes cell membrane - only lets certain things in to cell cytoplasm - jellylike fluid in cell where organelles are suspended Cytoskeleton - fibers in organelles, provide support ribosomes - makes protiens Nucleus - holds DNA and controls the cell Endoplasmic Reticulum (ER, Rough) - processes and transports molecules Endoplasmic Reticulum (ER, Smooth) - makes lipids and detoxifies, commonly in liver Golgi apparatus - packages and transports porteins using enzymes Mitochondria - makes ATP energy, runs on glucose/oxygen chloroplasts - found in plant cells, makes glucose using photosynthesis