Question 1

Following are the asexual spores of fungi except :
A) Ascospores
B) Arthrospores
C) Blastospores
D) Chlamydospores

Accepted Answer

Ascospores are sexual spores produced by ascomycetes fungi.

Question 2

Which of the following statement regarding bacterial spores is false:
A) Metabolically inactive
B) Don't multiply
C) Un able to vegetate again
D) Resistant to disinfection and boiling

Accepted Answer

Bacterial spores can vegetate again under favorable conditions, making statement C false.

Question 3

Volutin granules are:
A) Carbohydrates
B) Protein
C) Polyphosphate
D) None of the above

Accepted Answer

A

Question 4

Protect the organism from phagocytosis
A) Capsule
B) Spore
C) Flagella
D) Cell wall
E) Cytoplasmic membrane

Accepted Answer

The capsule is a protective layer that surrounds some bacteria, making it difficult for phagocytes to engulf and destroy them.

Question 5

Mesosomes are:
A) Cytoplasmic membrane invaginations
B) Cell wall structure
C) Intra nuclear structure
D) Site of action of antibiotics

Accepted Answer

Mesosomes are infoldings of the bacterial plasma membrane, often associated with cell division and DNA replication.

Question 6

Phospholiopid bilayer:
A) Cell wall
B) Cytoplasmic membrane
C) Capsule
D) Spore

Accepted Answer

The phospholipid bilayer is a fundamental component of the cytoplasmic membrane, which forms the boundary of cells and regulates the movement of substances in and out of the cell.

Question 7

Function of bacterial capsule is:
A) Protection of bacterial cell from phagocytosis
B) Giving shape and rigidity
C) Selective permeability
D) Secretion of hydrolytic enzymes

Accepted Answer

The bacterial capsule serves as a protective layer that helps prevent phagocytosis by host immune cells, thereby aiding in the bacteria's survival and virulence.

Question 8

Plasmids control the following processes in bacteria except:
A) Multiplication
B) Bacteriocin production
C) Antibiotic resistance
D) Toxin production

Accepted Answer

Plasmids do not control the multiplication of bacteria; they are involved in processes like antibiotic resistance, bacteriocin production, and toxin production.

Question 9

Transposons:
A) Genetic elements that contain RNA
B) Carry genes that may code for toxin production
C) Autonomously replicate
D) Mobile DNA sequence that can move from one site to another site.
E) B \& D

Accepted Answer

Transposons are mobile DNA sequences that can move from one site to another (D) and can carry genes, including those that may code for toxin production (B).

Question 10

The following statements are correct regarding transposons except:
A) Can carry genes that code for antibiotic $ r^{\prime} $
B) Can move from plasmid to another
C) Transmissible
D) Autonomously replicate

Accepted Answer

Transposons do not autonomously replicate; they require the host's replication machinery to propagate.

Question 11

The rigidity and shape of bacteria is due to:
A) Cell membrane
B) Peptidoglycan layer
C) Teichoic acid
D) Capsule

Accepted Answer

Peptidoglycan layer is responsible for the rigidity and shape of bacteria.

Question 12

Inclusion granules:
A) Permanent bacterial structure
B) Present only in gram negative bacilli
C) Reserved nutrients
D) Protein in nature

Accepted Answer

Inclusion granules are storage sites within bacterial cells that contain reserved nutrients such as glycogen, polyphosphate, or sulfur. They are not permanent structures, nor are they exclusive to gram-negative bacilli, and they are not protein in nature.

Question 13

The only prokaryotic that have sterol in cell membrane is:
A) Mycoplasma
B) Gram positive bacteria
C) Rickettsia
D) Chlamydia
E) Gram negative bacteria

Accepted Answer

The answer of The only prokaryotic that have sterol in...

Question 14

Fimbriae contribute to pathogenicity of bacteria by helping in:
A) Locomotion
B) Adhesion
C) Release of enzymes
D) Antiphagocytic

Accepted Answer

Fimbriae are hair-like structures on the surface of bacteria that help in adhesion to host cells, which is a key factor in bacterial pathogenicity.

Question 15

Sporulation of bacteria occurs in:
A) Log phase
B) Lag phase
C) Stationary phase
D) All of the above

Accepted Answer

Sporulation typically occurs in the stationary phase when nutrients are depleted, and environmental conditions become unfavorable for growth.

Question 16

Bacterial growth mean:
A) Increase in cell mass
B) Increase in cell size
C) Increase in cell number

Accepted Answer

Bacterial growth primarily refers to an increase in cell number, as bacteria reproduce through binary fission, leading to a population increase.

Question 17

Microaerophilic bacteria:
A) Require oxygen and oxygen is not toxic to it
B) Can grow in presence or absence of oxygen
C) Require oxygen at low level
D) Does not use oxygen but oxygen is not toxic to it
E) Does not use oxygen and oxygen is toxic to it

Accepted Answer

Microaerophilic bacteria require oxygen but at lower levels than are present in the atmosphere. They thrive in environments where the oxygen concentration is significantly reduced.

Question 18

Genetic information essential for the life of bacteria is a function of:
A) Ribosomes
B) Plasmid
C) Mesosomes
D) Chromosomes

Accepted Answer

Chromosomes contain the essential genetic information necessary for the survival and functioning of bacteria, while plasmids carry non-essential genes.

Question 19

The following are essential structure in bacterial cell:
A) Nuclear body
B) Fimbriae
C) Inclusion granules
D) Plasmid

Accepted Answer

The nuclear body, also known as the nucleoid, is an essential structure in bacterial cells as it contains the bacterial chromosome and is crucial for the cell's genetic functions.

Question 20

Sex pili is responsible for:
A) Bacterial adhesion
B) Bacterial motility
C) Gene transfer
D) Bacterial renlication

Accepted Answer

Sex pili are responsible for gene transfer during the process of bacterial conjugation, where they facilitate the transfer of genetic material between bacterial cells.

Quiz 1: Pathogenesis-Antibiotic-Structure

Following are the asexual spores of fungi except :

Which of the following statement regarding bacterial spores is false:

Volutin granules are:

Protect the organism from phagocytosis

Mesosomes are:

Phospholiopid bilayer:

Function of bacterial capsule is:

Plasmids control the following processes in bacteria except:

Transposons:

The following statements are correct regarding transposons except:

The rigidity and shape of bacteria is due to:

Inclusion granules:

The only prokaryotic that have sterol in cell membrane is:

Fimbriae contribute to pathogenicity of bacteria by helping in:

Sporulation of bacteria occurs in:

Bacterial growth mean:

Microaerophilic bacteria:

Genetic information essential for the life of bacteria is a function of:

The following are essential structure in bacterial cell:

Sex pili is responsible for: