MicroBiology exam 1

Microorganisms play an important role in each of the following processes except

Air pollution

Disease-causing microorganisms are called____

pathogens

The factors that contribute to the rising incidence of antibiotic resistance include:

overuse and misuse of antibiotics

The formal system for classifying and naming organisms was developed by ____

Robert Koch

The bacterial shape of the cells in the scanning electron micrograph shown in figure 1.1 would best be described as _____

Bacillus

Archea differ from bacteria in that arch

have cell walls composed of pseudomurein

If you were setting up an experiment to disprove spontaneous generation theory in a liquid medium, which of the following would be essential to the expirment?

Using a sterile liquid and preventing exposure to microorganisms

Which of the following findings was essential for Edward Jenners vaccination process?

Exposure to a pathogen may induce immunity

Which statement below is false about normal microbiota

Normal microbiota cannot cause diseases

Pasteurization is the process of removing most food spoilage causing pathogens by utilizing high temperature to kill all microorganisms present

False

Which is the false statement about the atom 12 C 6

It has 12 neutrons in its nucleus

Calculate the molecular weight of C2H5OH

46

Identify the salt compund in the following equation: Mg(OH)2 — MgCl2 + H2O

MgCl2

What is the chemical bond between K+ and I- ions in KI?

Ionic Bond

All statements about protein structure are true except

Teritary structures are formed only from covalent bonds

Starch, dextran, glycogen, and cellulose are polymers of ____

glucose

Which microscope achieves the highest magnification and creates resolution

Electron microscope

A virus measures 100 nm in length. What is its length in µm?

0.1 µm

Immersion oil is necessary when using the 100x objective on a compound light microscope ___

otherwise too much light is lost to refraction and the image will be fuzzy

Which of the following statements is true

Endospores survive in hostile environments