Biology Chapter 3 Review Questions And Answers

Biology Chapter 3 Review Questions And Answers /.When viewing a specimen through a light microscope, scientists us ________________ to distinguish the individual components of cells. A. a beam of electrons B. radioactive isotopes C. special stains D. high temperatures /.the _____________ is the basic unit of life A. organism B. cell C. tissue D. organ /.Which of these do all prokaryotes and eukaryotes share? A. nuclear envelope B. cell walls C. organelles D. plasma membrane /.A typical prokaryotic cell _____________ compared to a eukaryotic cell A. is smaller in size by a factor of 100 B. is similar in size C. is smaller in size by a factor of one million D. is larger in size by a factor of 10 /.Which of the following is found both in eukaryotic and prokaryotic cells? A. nucleus B. mitochondrion C. vacuole D. ribosome /.Which of the following is not a component of the endomembrane system? A. mitochondrion B. Golgi apparatus C. endoplasmic reticulum D. lysosome /.Which plasma membrane component can be either found on its surface or embedded in the membrane structure? A. protein B. cholesterol C. carbohydrate D. phospholipid /.the tails of the phospholipids of the plasma membrane are composed of ______________ and are _____________? A. phosphate groups; hydrophobic B. fatty acid groups; hydrophilic C. phosphate groups; hydrophilic D. fatty acid groups; hydrophobic /.water moves via osmosis ________________. A. throughout the cytoplasm B. from an area with a high concentration of other solutes to a lower one C. from an area with a low concentration of solutes to an area with a higher one D. from an area with a low concentration of water to one of higher concentration /.the principal force driving movement in diffusion is _______________________. A. temperature B. particle size C. concentration gradient D. membrane surface area /.Active transport must function continuously because ____________________. A. plasma membranes wear out B. cells must be in constant motion C. facilitated transport opposes active transport D. diffusion is constantly moving the solutes in the other direction /.