Tag: living world and classification of microbes

Questions Related to living world and classification of microbes

Which of the following are kingdoms?

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. Monera

  2. Protista

  3. Animalae

  4. All of the above

Show answer
Correct Option: D
Consider the following criteria.
a. Cell type
b. Level of organization
c. Mode of reproduction
d. Mode of nutrition.
The criteria which formed the basis of the five-kingdom classification include.
biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. $1, 2$ and $3$

  2. $2, 3$ and $4$

  3. $1, 2$ and $4$

  4. $1, 3$ and $4$

Show answer
Correct Option: A


Cells of many protistans, plants, and fungi, but not animals, commonly have

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. cell wall

  2. ribosomes

  3. plasma membrane

  4. mitochondria

Show answer
Correct Option: A
Explanation:

(A) The cell wall is a structural layer around types of the cell outside the cell membrane which provides the cell with structural support and protection found in algae, fungi, plants, bacteria and archaea.

(B) Ribosomes are minute particles with associated proteins and RNA to synthesise proteins and it can be found floating in the cytoplasm or attached to the endoplasmic reticulum.
(C) Plasma membrane surrounds the cell wall, which is composed of a phospholipid bilayer arranged back to back and covered in cholesterol and protein molecule.
(D) Mitochondria are rod-shaped organelles, considered the power generators of the cell which converts nutrients and oxygen into ATP. They are not present in bacteria.
Hence, the correct answer is 'cell wall'

Artificial systems of classification were based on

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. Vegetative characters

  2. Androecium structure

  3. All of these

  4. None of these

Show answer
Correct Option: C
Explanation:

Artificial systems of classification were based on morphological characters such as habit, habitat, colour, number and shape of leaves. They were mainly based on vegetative characters or on the androecium structure.

So, the correct answer is 'All of these'.

In Whittaker's five kingdom system of classification, eukaryotes are distributed among

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. two kingdoms

  2. three kingdoms

  3. four kingdoms

  4. all the five kingdoms

Show answer
Correct Option: C
Explanation:

R.H. Whittaker proposed a Five Kingdom Classification. The kingdoms defined by him were named Monera, Protista, Fungi, Plantae, and Animalia. Among five kingdoms, only Monera is prokaryotic and remaining four are Eukaryotic.

So the correct option is "four kingdom".

The five kingdom classification was proposed by 

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. R.H. Whittaker

  2. C. Linnaeus

  3. A. Roxberg

  4. Virchow

Show answer
Correct Option: A
Explanation:

The five kingdom classification was proposed by R.H. Whittaker.

So, the correct option is 'R.H. Whittaker'.

The arrangement of parts in an organism in such a way that the structure can only be divided into similar halves along one plane is known as

biology living world and classification of microbes pathogen and their mode of transmission economic importance of bacteria and fungi five kingdoms of living organisms

  1. Uniplanner symmetry

  2. Radial symmetry

  3. Bilateral symmetry

  4. Unique symmetry

Show answer
Correct Option: C
Explanation:

The property of being divisible into symmetrical halves on either side of a unique plane.

So, the correct option is 'Bilateral symmetry'.

Teichoic acid is present in 

botany living world and classification of microbes gram staining microbiology: organisms in industry cell wall and cell membrane

  1. Gram +ve bacteria

  2. Gram -ve bacteria

  3. Spirochaete

  4. Actinomycetes

Show answer
Correct Option: A
Explanation:

Teichoic acids are found within the cell wall of Gram-positive bacteria. The main function of teichoic acid is to provide rigidity to the cell wall by attracting cations, such as magnesium and sodium.

Which one of the following dyes cannot be used for staining chromatin material?

botany living world and classification of microbes gram staining microbiology: organisms in industry cell wall and cell membrane

  1. Acetocarmine

  2. Crystal violet

  3. Haematoxylin

  4. Schiff's reagent (Feulgen stain)

Show answer
Correct Option: B
Explanation:

Crystal violet dye is used as a histological stain and in Gram's method of classifying bacteria.
Rest all other dyes in option as acetocarmine, haematoxylin and Schiff's reagent are used to stain chromosome.
Thus, the correct answer is option B.

All the following statements are true about exotoxins except 

botany living world and classification of microbes gram staining microbiology: organisms in industry cell wall and cell membrane

  1. They are protein in nature.

  2. Are heat labile.

  3. Produced by Gram + positive bacteria.

  4. Are highly antigenic.

Show answer
Correct Option: C
Explanation:

An exotoxin is a toxin secreted by bacteria. An exotoxin can cause damage to the host by destroying cells or disrupting normal cellular metabolism. Exotoxin is secreted during lysis of the cell.