MCB 2010 Module 2 assignment pt.2

Which feature of the cytoplasmic membrane allows for the proton motive force?

Specialized proteins embedded in the cell membrane allow for protons to cross it and generate ATP.

Pili that are used for attachment are also called fimbriae.

True

As hydrogen ions (protons) move across the bacterial cytoplasmic membrane along the electrochemical gradient, energy is harvested and used to drive ATP synthesis.

True

Check all statements that apply to the bacterial cytoplasmic membrane.

• Barrier to large compounds

• Barrier to water

• Proton motive force

• Contains aquaporins

• Composed of polysaccharides

Which of the following is found exclusively in prokaryotic cells?

this one

As you increase the magnification on a microscope, the image seen through the microscope appears ______.

bigger

Identify the bacterial flagellum and its components in the figure. Not all labels are used.

this one

Match the following eukaryotic organelles with their function.

this one

The target of lysozyme in bacterial cells is ______.

the cell wall

Select THREE reasons that lipopolysaccharide is medically important.

this one

Which of the following cytoskeletal elements are found within the eukaryotic flagella?

Microtubules

If you remove the glycocalyx of a bacterium, the organism would no longer be able to

this one

Which of the steps shown is found in the endospore and acid-fast stains but NOT in the simple stain or Gram stain?

this one

Identify which image refers to the cell wall of Gram-positive bacteria vs. Gram-negative bacteria.

this one

Label the prokaryotic and eukaryotic ribosomes with the appropriate subunits. Not all labels are used.

this one

Which of the following is a component of the outer membrane in Gram-negative bacteria that, in large amounts, can induce a lethal immunological response?

Lipopolysaccharide

Which of the following best describes why transport systems are needed for cell survival?

The cytoplasmic membrane is a selective barrier to any compound which is large and charged.

Match the following transport systems to the correct images. Not all labels are used.

this one

Label the following endocytosis/exocytosis image.

this one

Match the statement to the term that it most accurately describes to test your understanding of the
elements of good microscopy.

this one

Involved in cell division and controlling cell shape

Cytoskeleton

Involved in protein synthesis

Ribosome

Contains genetic information required for survival

Chromosome

Contains compounds that aid in buoyancy

Gas vesicle

A dormant cell state

Endospore

Contains high-molecular-weight polymers

Storage granules

Typically contains genetic information that is not required by the cell.

Plasmid

Select which of the following are found ONLY in eukaryotic cells.

this one