pH Reaction Energy & Molecules – Microbiology

Quiz 1 pH Reaction, Energy & Molecules – Microbiology

This quiz is about pH Reaction, Energy & Molecules – Microbiology.

Match the following.

Dehydration synthesis → Reactions which removes water to form chemical bonds,

Exergonic reactions → Releases more energy than they use,

Hydrolytic reactions → Uses water to break apart molecules,

Endergonic reactions → Uses more energy than they release

All of the following areas contain normal microbiota except….

A. Skin

B. Intestines

C. Cranial cavity – correct

D. Urogenital tract

Scientist who implemented hand washing techniques to prevent childbed fever.

A. Koch

B. Semmelweis – correct

C. Nightingale

D. Pasteur

Which dye is used to identify endospores? 

A. Methylene blue

B. Malachite green – correct

C. Crystal violet

D. Safranin

The Rampage COVID-19 article indicated that all of the following organs were directly affected by the virus except…….

A. Urinary bladder – correct

B. Liver

C. Intestines

D. Heart and blood vessels

Which of the following scientists were responsible for developing a working microscope?

A. Semmelweis

B. van Leeuwenhoek – correct

C. Koch

D. Nightingale

Which of the following scientists utilized heat to control the growth of microbes? 

A. Redi

B. Pasteur – correct

C. Koch

D. Lister

The use of microbes when cleaning an oil spill is an example of bioremediation.

True – correct


Redi was responsible for improving handwashing techniques.


False – correct

The crystal violet stain is retained because of the mycolic acid within the cell wall of the Gram positive organism.


False – correct

A virus can be seen with a compound light microscope as long as there is oil immersion.


False – correct

Biofilms are known to grow on surfaces such as catheters.

True – correct


Acid Fast Staining will test positive if there is mycolic acid found within the cell wall of the organism. 

True – correct


The organic molecules known as phospholipids are key components of cell membranes and composed of which molecules?

A. fatty acids

B. glycerol

C. nucleotides

D. both glycerol and fatty acids – correct

E. amino acids

Which of the following are examples of cations?

A. HCO3-

B. Ca2+ – correct

C. Cl-

D. SO42-

E. HPO42-

Molecules that readily dissolve in water are called:

A. isotonic

B. lipids

C. non-polar

D. hydrophobic

E. hydrophilic – correct

HCl(hydrochloric) is considered an acid because

A. it is able to form hydroxide ions.

B. in solution it donates its H+. correct

C. in solution it decreases the concentration of free H+.

D. it is similar to ammonia.

E. in solution it increases the pH.

The molecule RNA contains the five-carbon sugar

A. uracil.

B. lactose.

C. deoxyribose.

D. ribose. – correct

E. glucose.

The reaction rates of many chemical reactions that occur in the body are controlled by special protein molecules called

A. purines.

B. enzymes.- correct

 C. nucleic acids.

D. neurotransmitters.

E. intermediates.

An enzyme that will digest proteins into amino acids is

A. sucrase

B. lipase

C. lactase

D. nuclease

E. carboxypeptidase – correct

Which of the following dyes is not involved with theGram staining method?

A. iodine

B. crystal violet

C. all of the above stains are utilized 
all of the following stains are utilized 

D. safranin

E. malachite green – correct

Consider the reaction AB–>A + B. What is the product of this reaction?

A. A

B. A and B – correct

C. A, B, and AB

D. B


Which of the following is not a part to a compound microscope?

A. slide clip

B. brightness adjustment

C. transducer knob – correct

D. objective lens

E. Condenser

The type of reaction which builds a protein is a dehydration synthesis reaction.

True – correct


Olive oil would be considered a saturated fat because of it’s lack of double bonding within it’s fatty acid chain.


False – correct

Which of the following individuals does not correctly match with their contribution to microbiology? 

A. Florence Nightingale: Established the use of aseptic techniques in nursing practices

B. Ignaz Semmelweis: First developed aseptic techniques to decrease mortality rates from childbed fever

C. Robert Koch: Developed criteria for determining the causative agent of an infectious disease

D. Joseph Lister: Developed the binomial nomenclature system – correct

E. Louis Pasteur: Showed that biogenesis is responsible for propagation of life

Activation energy is

A. the energy required for an endergonic reaction

B. the energy lost or gained in a reaction

C. the energy required to bring molecules into a position where they can interact or react – correct

D. required to convert an endergonic to an exergonic reaction

Sucrose and glucose are isomers of each other because they both share the same molecular formula of C6H12O6.


False – correct

Which of the following does not represent a functional group?

A. R-CH3

B. R-R-ST – correct


D. R-O-R’

E. R-NH2

Which of the following is an organic molecule?

A. CO2

B. All options are inorganic molecules

C. H2O

D. O2

E. C6H12O6 – correct

Saturated fats are solid at room temperature.

True – correct


Enzymes increase reaction rate by 

A. converting an endergonic reaction to an exergonic reaction

B. increasing the free energy in the products

C. raising the activation energy of a reaction – correct

D. lowering the activation energy of a reaction 

Loss of consciousness and strokes have been associated with some COVID-19 cases.

True – correct


Which of the following areas on the body is not a place where you would find normal microbiota?

A. urogenital tract

B. surface of the skin

C. within the cardiovascular system – correct

D. stomach

E. respiratory system

Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is ______ and Z is ______.  

A. a base; a strong acid

B. an acid; a base

C. an acid; a buffer

D. a base; a buffer – correct

E. a buffer; a base 

Commensalism is the relationship when the hosts benefits but the organism is harmed.


False – correct

Alkalosis is when the pH of the solution(blood) decreases.


False – correct