Revision- G9

Which is true of prokaryotic and eukaryotic cells?

• Prokaryotic cells are larger than eukaryotic cells

• Eukaryotic cells do not have nuclei, and prokaryotic cells do have nuclei.

• Prokaryotic cells lack membrane-bound organelles, and eukaryotic cells contain membrane-bound organelles.

• Eukaryotic cells are simpler than prokaryotic cells.

Membrane-bound organelles have been an

important component in the evolution of complex,

multicellular organisms. Which of the following

best summarizes an advantage of eukaryotic cells

having internal membranes?

• Eukaryotic cells are able to reproduce faster because of the presence of organelles.

• Some organelles, such as mitochondria and chloroplasts, are similar to prokaryotic cells in structure.

• Organelles isolate specific reactions, increasing metabolic efficiency.

• Compartmentalization leads to a higher mutation rate in DNA, which leads to more new species.

Which of the following is major cause of the size limits for certain types of cells?

• evolutionary progression in cell size; more primitive cells have smaller sizes.

• the need for sufficient surface area to support the cell's metabolic needs.

• limitation on the strength and integrity of the plasma membrane as cell size increases

• the difference in plasma membranes between prokaryotes and eukaryotes

A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, distilled water-equal to the volume of blood lost-is transferred directly into one of his veins. What will be the most probable result of this transfusion?

• The patient's red blood cells will shrivel up because the blood fluid has become hypertonic compared to the cells.

• The patient's red blood cells will shrivel up because the blood fluid has become hypotonic compared to the cells.

• It will have no unfavorable effect as long as the water is free of viruses and bacteria.

• The patient's red blood cells will swell because the blood fluid has become hypotonic compared to the cells.

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

• glycogen

• Cellulose

• Proteins

• Lipids

All of the following are part of a prokaryotic cell except

• a plasma membrane

• Endoplasmic reticulum

• DNA

• Ribosomes

Which of the following supports the Endosymbiotic Theory?

• cells produce their own proteins

• glycolysis is common to all cells

• mitochondria contain their own DNA and ribosomes

• chloroplasts developed from enfoldings of the cell membrane

The difference between osmosis and diffusion is that

• diffusion is passive transport, whereas osmosis is active transport

• only in diffusion do molecules move from areas of high concentration to areas of low concentration

• osmosis is the opposite of diffusion and only involves the movement of water

• osmosis refers specifically to the movement of water, whereas diffusion refers to the movement of any type of molecules

A prokaryotic cell has which of the following?

• Centrioles

• Plasma membrane

• Mitochondria

• Lysosomes

All of the following cell components are found in prokaryotic cells EXCEPT

• DNA

• Ribosomes

• Nuclear envelope

• Plasma membrane