Cell structure and function

Match the following

• Mitochondrion

• 
• Smooth reticulum endoplasmic

• 
• Lysosome

• 
• Golgi apparatus

• 
• Vacuole

• 

Draw a prokaryotic cell

If you are a linear DNA molecule complexed with protein and residing within a nuclear envelope, you are____________

• Prokaryotic chromosome

• Eukaryotic chromosome

• Nucleolus

• Ribosome

Which of the following sequences correctly lists in order the steps involved in the incorporation of a protein within a cell membrane?

• Synthesis of the protein on the ribosome; modification in the Golgi apparatus; packaging in the endoplasmic reticulum; modification in the vesicle.

• Synthesis of the protein on free ribosomes; modification in the Golgi; packaging in the vesicle; distribution in the endoplasmic reticulum.

• Synthesis of the protein on the ribosome attached to the endoplasmic reticulum; tagging in the Golgi; distribution via the vesicle.

• Synthesis of the protein on free ribosomes; packaging in the vesicle; distribution via the Golgi; modification in the endoplasmic reticulum.

What type of molecules can pass directly through the membrane?

• Small hydrophilic molecules

• Large hydrophilic molecules

• Small polar molecules

• Small hydrophobic molecules

• All small molecule

Mature mammalian red blood cells, erythrocytes, have no nucleus, ribosomes, or mitochondria. The cytoplasm of erythrocytes is rich in hemoglobin, the protein that carries oxygen. A large amount of hemoglobin allows the red blood cells to carry the oxygen the cells need for the high rate of metabolism in mammals. Unlike other types of cells that can replace damaged molecules and organelles, red blood cells have a reduced capacity for repair and thus only survive for about four months. Why can red blood cells not repair damaged proteins?

Which part of cell theory is illustrated best by the comic strip on the left?

• All living things are made of cells

• The smallest unit of life is the cell

• New cells come from existing cells

Match the following

• Makes ATP from glucose

• Ribosome

• Destroys old broken proteins ; digests things

• lysosome

• Makes protein

• Mitochondrion

• Stores things

• Golgi

• Ships things outside the cell

• Vacuole

Why is the “fluid mosaic” model considered a good model to explain the cell membrane structure?