Biology 1001 Exam 2 Practice Questions with Correct Answers
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Course
BIOL 1001
Institution
BIOL 1001
what does the cell theory state? that all cells come form previously existing cells and consist of three principles
what are the three principles of the cell theory? 1. every organism is made up of one or more cells 2. the smallest organism are single cells, and cells are the functional units of m...
Biology 1001 Exam 2 Practice Questions with Correct Answers what does the cell theory state? ✅that all cells come form previously existing cells and consist of three principles what are the three principles of the cell theory? ✅1. every organism is made up of one or more cells 2. the smallest organism are single cells, and cells are the functional units of multicellular organisms 3. all cells arise from a pre -existing cell who developed the primitive light microscope? ✅robert hooke who build his own microscope in the 1670's? ✅anton van leeuwenkoek light microscopes use lenses made of glass or ______ to bend and focus light ✅quartz light microscopes have a better _______ power. ✅resolving electron microscopes provide ______ resolution ✅high __________ electron microscopes bounce electrons off specimens that are dry and hard ✅scanning _______ electron microscopes pass electrons through a thin specimen ✅transmission in ______ cells, the genetic material is contained within a membrane enclosed structures ✅eukaryotic eukaryotic cells are more ______ and makeup bodies of animals, plants, fungi, and protist ✅complex Prokaryotic cells do not have a _________. ✅nucleus the single cells of bacteria and archaea, the simplest forms of life, are ____________. ✅prokaryotic most cells range in size from 1 to 100 __________ in diameter ✅micrometers (millionths of a meter) _______ is a process by which molecules dissolved in fluids move; is relatively slow ✅diffusion the ________ encloses the cell and allows interactions between the cell and its environment ✅cell membrane what consist of proteins embedded in a bilayer of phospholipids ? ✅plasma membrane _______ proteins allow specific molecules to pass into or out of the cell ✅channel ______ proteins blind messenger molecules and initiate a cells response to the message ✅receptor the ______ consist of all the fluid and structures inside the plasma membrane but outside the nucleus in eukaryotes ✅cytoplasm ________ is the fluid portion of the cytoplasm ✅cytosol what does cytosol contain? ✅water, salts, and organic molecules the ______ consist of a variety of protein filaments ✅cytoskeleton what do the protein filaments do? ✅-provide support and transport structures within the cell -allow cells to move and change shape -play a role in cell division ______ guides construction of cell parts/proteins ✅RNA what is DNA? ✅deoxyribonucleic acid DNA _____ an inherited set of instructions in segments called genes ✅encodes DNA genes are copied to _______ ✅ribonucleic acid (RNA) ______ are simpler than eukaryotes ✅Prokaryotes Prokaryotes are ______ ✅unicellular prokaryotes make up two of life's domains, _____ and ______ ✅archaea and bacteria nearly all prokaryotic cells are surrounded by a ______. ✅cell wall
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