Exam 4: A Tour of the Cell

One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ________ prokaryotic cells.

Read the following scenario to answer the following questions. Different species of bacteria are resistant to different types of antibiotics. For example, one species of bacteria may be resistant to an antibiotic that targets bacterial ribosomes but may not be resistant to a different antibiotic that targets bacterial cell walls. In order to figure out what type of antibiotic(s) to which a species of bacteria was resistant, a researcher treated the bacteria with four different antibiotics (A, B, C, and D) and measured how many bacteria were alive over the course of a few weeks. The data that she collected are summarized below. -If you were treating a patient infected with this species of bacteria,which antibiotic would you prescribe the person such that the bacteria were killed most effectively?

Scenario Questions Read the following scenario to answer the following questions. The earliest cells detectable in fossils were different from the cells in animals, plants, fungi, and protists living today. These first prokaryotic cells gave rise to eukaryotic cells approximately 1.7 billion years ago. The structure of eukaryotic cells today suggests how they might have evolved from their prokaryotic ancestors. Scientists examining mitochondria and chloroplasts now think that these organelles were probably free-living prokaryotes before becoming a part of eukaryotic cells long ago. -What evidence suggests that mitochondria might have evolved before chloroplasts?

Which of the following structures manufactures the components of ribosomes?

The child shown in the figure below is not feeling well.Why does the poster say "No Antibiotics Please"?

________ are the major lipids of plasma membranes.

Functions of the smooth endoplasmic reticulum include ________.

Information is transferred from the nucleus to ribosomes via ________.

The figure below shows a Paramecium,a single-celled freshwater protist.The hairlike structures visible on the Paramecium allow it to move.These structures are ________.

During a race such as a marathon,the skeletal muscle cells in your legs use a lot of energy to continually contract and power your muscles.What organelle is most likely abundant in skeletal muscle cells?

The extracellular matrix of animal cells ________.

Microtubules are associated with ________.