Unit 1 Review (Ch. 1, 4, 6 & 7): BIOL 2261 Questions With
Complete Solutions
A spectrophotometer can be used to measure:
a. turbidity
b. pathogenicity
c. metabolic activity
d. dry weight Correct Answer a. turbidity
A(n) _______ can be defined as a disease affecting a large
number of individuals in a short period of time on a global scale.
a. antibiotic-resistant infection
b. epidemic
c. emerging infectious disease
d. pandemic Correct Answer d. pandemic
Addition of salts and sugars preserves foods because they:
a. produce hydroxyl radicals in the medium
b. increase osmotic pressure
c. lower pH.
d. create an isotonic environment Correct Answer b. increase
osmotic pressure
ALL of the following are natural human defenses against
disease EXCEPT:
a. interferon
b. skin
c. penicillin
d. mucous membrane Correct Answer c. penicillin
, An organism that uses oxygen when present but can grow
without oxygen is called a(n)
a. obligate aerobe
b. aerotolerant anaerobe
c. mircoaerophile
d. facultative anaerobe Correct Answer d. facultative
anaerobe
Bacillus thuringiensis is used:
a. as a natural insecticide
b. to recycle vital elements
c. in bioremediation
d. to treat sewage Correct Answer a. as a natural insecticide
Direct flaming is one of the simplest methods of
a. moist heat sterilization
b. desiccation
c. dry heat sterilization
d. pasteurization Correct Answer c. dry heat sterilization
Gene therapy can be used to treat:
a. Zika virus infection
b. cystic fibrosis (a genetic disease)
c. antibiotic-resistant S. aureus infections
d. avian influenza A infections Correct Answer b. cystic
fibrosis (a genetic disease)
In 1978, Carl Woese devised a system of classification that
groups organisms into the domains Bacteria, Archaea, and
Eukarya. Which of the following belongs to none of these
categories?
Complete Solutions
A spectrophotometer can be used to measure:
a. turbidity
b. pathogenicity
c. metabolic activity
d. dry weight Correct Answer a. turbidity
A(n) _______ can be defined as a disease affecting a large
number of individuals in a short period of time on a global scale.
a. antibiotic-resistant infection
b. epidemic
c. emerging infectious disease
d. pandemic Correct Answer d. pandemic
Addition of salts and sugars preserves foods because they:
a. produce hydroxyl radicals in the medium
b. increase osmotic pressure
c. lower pH.
d. create an isotonic environment Correct Answer b. increase
osmotic pressure
ALL of the following are natural human defenses against
disease EXCEPT:
a. interferon
b. skin
c. penicillin
d. mucous membrane Correct Answer c. penicillin
, An organism that uses oxygen when present but can grow
without oxygen is called a(n)
a. obligate aerobe
b. aerotolerant anaerobe
c. mircoaerophile
d. facultative anaerobe Correct Answer d. facultative
anaerobe
Bacillus thuringiensis is used:
a. as a natural insecticide
b. to recycle vital elements
c. in bioremediation
d. to treat sewage Correct Answer a. as a natural insecticide
Direct flaming is one of the simplest methods of
a. moist heat sterilization
b. desiccation
c. dry heat sterilization
d. pasteurization Correct Answer c. dry heat sterilization
Gene therapy can be used to treat:
a. Zika virus infection
b. cystic fibrosis (a genetic disease)
c. antibiotic-resistant S. aureus infections
d. avian influenza A infections Correct Answer b. cystic
fibrosis (a genetic disease)
In 1978, Carl Woese devised a system of classification that
groups organisms into the domains Bacteria, Archaea, and
Eukarya. Which of the following belongs to none of these
categories?
