Chapter 3

All cells have these three things in common: a. cytoplasm, DNA, and organelles with membranes b. a plasma membrane, DNA, and a nucleus c. cytosol, DNA, and a plasma membrane d. a cell wall, cytoplasm, and DNA

Which of the following is not a principle of the cell theory? a. Every cell arises from division of another cell. b. A cell is alive even as part of a multicelled body. c. Eukaryotic cells have a nucleus, and prokaryotic cells do not. d. The cell is the basic unit of life.

Unlike eukaryotic cells, prokaryotic cells _________ a. have no plasma membrane b. have RNA but not DNA c. have no nucleus

The surface-to-volume ratio ________ a. does not apply to prokaryotic cells b. is part of the cell theory c. constrains cell size

Cell membranes consist mainly of ______ and ________ a. lipids; carbohydrates b. phospholipids; proteins c. lipids; ECM d. phospholipids; ECM

Which of the following statements is correct? a. Some animal cells are prokaryotic. b. Only eukaryotic cells have mitochondria. c. The plasma membrane is the outermost boundary of all cells.

In a lipid bilayer, the _________ of all the lipid molecules are sandwiched between all of the ______ a. hydrophilic tails; hydrophobic heads b. hydrophilic heads; hydrophilic tails c. hydrophobic tails; hydrophilic heads d. hydrophobic heads; hydrophilic tails

The main function of the endomembrane system is a. building and modifying proteins and lipids b. isolating DNA from toxic substances c. secreting extracellular matrix onto the cell surface d. producing ATP by aerobic respiration

What controls the passage of molecules into and out of the nucleus? a. endoplasmic reticulum, an extension of the nucleus b. nuclear pores, which consist of many proteins c. dynamically assembled microtubules d. tight junctions

Put the following structures in order according to the pathway of a secreted protein: a. plasma membrane b. Golgi body c. endoplasmic reticulum d. post-Golgi vesicles

No animal cell has a __________ a. plasma membrane b. flagellum c. lysosome d. cell wall

________ fasten animal cells to one another and to basement membrane. a. Plasmodesmata b. Adhering junctions c. Tight junctions d. Gap junctions

Which of the following organelles contains no DNA? a. nucleus b. Golgi body c. mitochondrion d. chloroplast

Match each cell component with its main function. mitochondrion chloroplast ribosome nucleus cell junction flagellum cuticle a. connection b. protects surfaces c. ATP production d. protects DNA e. protein synthesis f. photosynthesis g. movement