Exam 1

Question 1

Each of the following organisms would be considered a microbe EXCEPT

Answer 1

D) flea

Question 2

Which of the following is NOT a domain in the three-domain system?

Answer 2

A) Animalia

Question 3

In the name Staphylococcus aureus, aureus is the

Answer 3

C) species

Question 4

The formal system for classifying and naming organisms was developed by

Answer 4

C) Carolus Linnaeus

Question 5

True or False: Prokaryotic organisms possess plasma membranes

Answer 5

True

Question 6

Who is credited with first observing microorganisms?

Answer 6

B) Anton van Leeuwenhoek

Question 7

Biogenesis refers to the

Answer 7

B) development of life forms from preexisting life forms.

Question 8

Regarding Louis Pasteur’s experiments with the S-neck flask, which of the following statements is TRUE?

Answer 8

E) All of the answer choices are correct.

Question 9

Proof that a specific microbe could cause disease was provided by?

Answer 9

C) Koch

Question 10

Identify the acid in the following equation: Mg(OH)2 + 2HCl → MgCl2 + H2O

Answer 10

B) HCl

Question 11

Which of the following is the type of bond holding multiple H2O molecules together?

Answer 11

B) hydrogen bond

Question 12

Identify the following reaction: Glucose + Fructose → Sucrose + Water

Answer 12

A) dehydration synthesis reaction

Question 13

Which type of molecule is composed of (CH2O) units, i.e. always a 2:1 ratio of H to O?

Answer 13

A) carbohydrate

Question 14

Which of the following is NOT equal to 1 mm?

Answer 14

E) 100 um

Question 15

Which of the following places the steps of the Gram stain in the correct order?
1- alcohol
2-safranin
3-Crystal Violet
4- iodine

Answer 15

B) 3-4-1-2

Steps: 3-Crystal Violet, 4-Iodine, 1-Alcohol, 2-Safranin

Question 16

Amongst the following microscopes, which one achieves the highest magnification and greatest resolution?

Answer 16

D) electron microscope

Question 17

During transmission electron microscopy, the electron beam passes electrons through the specimen and are subsequently read by the sensor to produce an image.

Answer 17

A) True

Question 18

Which of the following statements is INCORRECT regarding prokaryotic cells?

Answer 18

E) They lack a plasma membrane.

Question 19

True or False: The outer membrane of gram-positive bacteria makes them highly susceptible to phagocytosis.

Answer 19

B) False

Question 20

True or False: Both fimbriae and pili are composed of the same protein, pilin

Answer 20

A) True

Question 21

Functions of the glycocalyx include all of the following EXCEPT

Answer 21

D) binary fission.

Question 22

Which of the following statements about gram-negative cell walls is FALSE?

Answer 22

D) They are highly sensitive to penicillin.