Chapter 3: Cells: The Living Units

Which of the following statements best describes the fluid mosaic model of the plasma membrane?

• a protein bilayer sandwiching a layer of lipids
  

• a single layer of proteins with lipid molecules dispersed within
  

• a single layer of lipids surrounding a layer of proteins
  

• a lipid bilayer with protein molecules dispersed within it
  

Which item below is NOT a function or role performed by proteins found in the plasma membrane?

• joining of adjacent cells
  

• synthesis of proteins
  

• attachment site for cytoskeleton
  

• transport of solutes
  

• receptor for chemical messenger molecules
  

In which stage of mitosis do the chromosomes align along the cell equator?

• metaphase

• anaphase
  

• telophase

• prophase

Lysosomes perform which of the following cellular functions?

• protein synthesis
  

• lipid synthesis
  

• intracellular digestion
  

• formation of microtubules
  

Which of the following organelles produces secretory vesicles?

• rough endoplasmic reticulum
  

• Golgi apparatus
  

• centrosome

• mitochondrion
  

Which type of membrane transport process uses ATP as a source of energy?

• osmosis

• simple diffusion

• primary active transport
  

• facilitated diffusion
  

Which of the following organelles maintains cell shape, supports cellular structures, and generates cell movements?

• cytoskeleton
  

• smooth endoplasmic reticulum
  

• lysosome
  

• centrosome
  

Which of the following organelles is responsible for generating most of the energy the cell uses to perform work?

• smooth endoplasmic reticulum
  

• mitochondrion
  

• Golgi apparatus
  

• nucleolus

Which of the following organelles possesses oxidase enzymes that function in neutralizing harmful free radicals?

• mitochondrion
  

• nuclear envelope
  

• ribosome
  

• peroxisome
  

Which of the following organelles serves as the site of protein synthesis?

• ribosome

• Golgi apparatus
  

• mitochondrion
  

• lysosome