Unit 7 Biology Practice Test

1.

Which type of microscope would you use to examine the internal structures of a cell organelle?

  • Light microscope

  • Transmission electron microscope (TEM)

  • Scanning tunneling microscope (STM)

  • Confocal microscope

2.

In the gram stain test what colour do gram positive bacteria go and what colour do gram negative bacteria go?

3.

What is the term used to describe the process of introducing microorganisms into a culture medium?

  • Inoculation

  • Incubation

  • Isolation

  • Infection

4.

What is the primary structural difference that is used to differentiate between the domains Archaea and Bacteria?

  • Differences in ribosomal RNA sequences

  • Differences in cell wall composition

  • Differences in membrane lipid structure

  • Differences in genetic material

5.

Characteristics: Extremophiles, Extreme halophiles, Extreme thermophiles, Methanogens

6.

What is the primary reproductive process used by bacteria to replicate?

  • Budding

  • Binary fission

  • Fragmentation

  • Sexual reproduction

7.

What is the shape of Herbaspirillum huttiense bacteria when observed under a microscope?

  • Rod-shaped

  • Cocci

  • Spiral

  • Filamentous

8.

Why are cyanobacteria important in the history of the Earth?

9.

If a strain of normal flora bacteria in the gut becomes toxic after a patient undergoes antibiotic treatment, which of the following scenarios could explain this change?

  • The antibiotic killed off competing bacteria, allowing the strain to thrive.

  • The antibiotic directly mutated the strain.

  • The strain was always toxic but undetected.

  • The strain was transferred from another host.

10.

Which of the following bacterial groups is classified as gram-negative?

  • Firmicutes

  • Actinobacteria

  • Gammaproteobacteria

  • Nonproteobacteria