Question

required information
the gram stain
this animation learning module will review the gram stain technique, a differential staining procedure that differentiates between bacteria based on their cell wall composition. complete the following activities to demonstrate your understanding of this important technique in microbiology.

1. true or false: bacteria are larger than human cells

(click to select)

1. true or false: bacteria are only visible with an electron microscope

(click to select)

1. the term used to describe a cluster of spherical bacteria is ________

(choices: streptococcus, staphylococcus, spirillum)

Explanation:

Question 1: True or False: Bacteria are larger than human cells

Human cells are generally larger than bacterial cells. Bacterial cells typically range from 0.5 to 5 micrometers in size, while human cells (e.g., epithelial cells) are often around 10 - 20 micrometers or larger. So the statement is false.

Bacteria can be visible under a light microscope (especially with staining techniques like Gram staining). Electron microscopes are used for higher - resolution imaging, but light microscopes (compound microscopes) can magnify enough to see bacteria (usually with magnification of 1000x or so). So the statement is false.

• Staphylococcus: Refers to clusters of spherical (cocci) bacteria.
• Streptococcus: Refers to chains of spherical bacteria.
• Spirillum: Refers to spiral - shaped bacteria.

So if the options include staphylococcus, that is the term for a cluster of spherical bacteria.

Answer:

False

Question 2: True or False: Bacteria are only visible with an electron microscope