Tag: evs

Questions Related to evs

Pasteur effect is due to

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Change from aerobic to anaerobic

  2. Providing oxygen to anaerobically respiring structures

  3. Rapid utilisation of ATP

  4. Nonsynthesis of ATP

Show answer
Correct Option: B
Explanation:

Most microorganisms such as fungi and bacteria can grow and flourish in the complete absence of oxygen and is known as fermentation. Pasteur described that fermentation is directly associated with the growth of metabolism of living matter. He observed that the rate of fermentation was considerably higher under anaerobic conditions as compared to aerobic conditions. The inhibition of anaerobic breakdown of sugars into carbon dioxide and ethyl alcohol due to the presence of oxygen under aerobic conditions is known as Pasteur effect. 

Thus, the correct answer is 'Providing oxygen to anaerobically respiring structures'.

The method of growing micro-organisms as a thin layer on a nutrient medium is known as

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Thin layer growth system

  2. Support growth system

  3. Suspended growth

  4. None of these

Show answer
Correct Option: B
Explanation:

Support growth system refers to a process in which the microorganisms are grown on a thin layer of nutrient medium. A nutrient medium provides various nutrients required for the growth of microorganism to carry out their metabolic activities. The nutrient media supports the growth of a wide range of microorganisms. So, the correct answer is 'Support growth system'.

Exceptions to Koch's postulates are 

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Viruses

  2. Fungi

  3. Protozoans

  4. Spirochaetes

Show answer
Correct Option: A
Explanation:

Koch's postulate designed the causative relationship between a microbe and a disease.  Viruses are obligate intracellular parasites so they cannot be grown on artificial media. 

So, the correct answer is 'Viruses'

The first person to propose that disease is due to a natural cause was

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Aristotle

  2. Hippocrates

  3. Vesalius

  4. Pasteur

Show answer
Correct Option: B
Explanation:

Hippocrates believed that disease caused inside the body is due to a natural cause not by gods and superstition. He gave humor theory based on the black bile produced, which was later rejected.

So, the correct option is 'Hippocrates'.

Who saved the silk industry of Germany?

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Pasteur

  2. Spallanzani

  3. Robert Koch

  4. Leeuwenhoek

Show answer
Correct Option: A

Koch's postulates are about

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Nutrition related diseases

  2. Pathogen related diseases

  3. Genetic disorders

  4. Degeneration diseases

Show answer
Correct Option: B
Explanation:

Koch's postulates are used to trace back the causal organism of a particular disease in the host organism. It designed the causative relationship between a microbe and a disease. 

So, the correct answer is 'Pathogen related diseases' 

The process of pasteurization was invented in 

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. 1864

  2. 1964

  3. 1867

  4. 1854

Show answer
Correct Option: A

Micro-organisms having optimum temperature for growth below $15^0$ C which cannot grow above $20^0$ C are called

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Mesophiles

  2. Thermophiles

  3. Psychrophiles

  4. None of the above

Show answer
Correct Option: C
Explanation:

(A)Mesophile is an organism that grows in a moderate temperature from 20-45 degree Celcius.

(B)A thermophile is an organism that grows in a relatively high temperature from 41-122 degree Celcius.
(C) is an organism that grows in a relatively low temperature from below 15-degree Celcius.
So, the correct option is 'Psychrophiles'.

With which of the following is the name of Louis Pasteur associated?

evs louis pasteur contribution of louis pasteur discoveries by louis pasteur discovery of microorganisms

  1. Explanation of the formation of simple organic molecules in the early atmosphere of earth

  2. The proposition of the composition of gases in the early atmosphere of earth

  3. Disproving the theory of spontaneous generation of organisms

  4. Proposition that the first photosynthetic organisms were cyanobacteria

Show answer
Correct Option: A

Select the correct option:

Match column I with column II and select the correct option from the codes given below:

Column I(Parts of alimentarycanal of earthworm) Column II(Respective segments)
(A) Buccal cavity (i) 1-3
(B) Pharynx (ii) 3-4
(C) Oesophagus (iii) 5-7
(D) Gizzard (iv) 8-9
(E) Stomach (v) 9-14
(F) Intestine (vi) 15 to last
(G) Typhlosole (vii) 26-35

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. A- (i); B- (ii); C- (iii); D- (iv); E- (v); F- (vi); G- (vii)

  2. A- (i); B- (ii); C- (iii); D- (v); E- (iv); F- (vi); G- (vii)

  3. A- (i); B- (iii); C- (ii); D- (iv); E- (v); F- (vii); G- (vi)

  4. A- (i); B- (iii); C- (ii); D- (v); E- (iv); F- (vii); G- (vi)

Show answer
Correct Option: A
Explanation:

(A) Buccal cavity: 1-3

(B) Pharynx: 3-4
(C) Oesophagus: 5-7
(D) Gizzard: 8-9
(E) Stomach: 9-14
(F) Intestine: 15 to last
(G) Typhlosole: 26-35
So, the correct answer is 'A- (i); B- (ii); C- (iii); D- (iv); E- (v); F- (vi); G- (vii)'.