Microorganisms Test

Result

Microorganisms Test - 6

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Depending on the shapes of bacteria, they have been grouped into four different types:

Select the correct statement from the options given below.

A
Lactobacillus is an example of type P which causes conversion of milk to curd.

B
Staphylococcus is an example of type S.

C
Both Q and R are rod-shaped bacteria and are called bacilli.

D
S is a comma-shaped bacteria known as spirillum.

Solution

P - Bacillus (rod), Q - Coccus, R - Spirillum,S - Vibrio
Lactobacillus is a rod shaped bacterium (type P). It converts milk into curd.
Question 2
1 / -0

Refer to the given figures P, Q and R:

Which of the following statements are correct regarding the figures?

a. P belongs to the group called bacteria which can be both harmful and useful to mankind.
b. Q reproduces only inside the body of a host organism.
c. R is amoeba which is responsible for causing dysentery.
d. Common ailments like cold, influenza (flu) and most coughs are caused by Q.

A
a and b only

B
a and d only

C
a, b and c only

D
a, b, c and d

Solution

P represents bacteria which have both useful and harmful effects.
Q represents a virus which can reproduce only inside the body of the host.
Viruses are responsible for causing various diseases including cold, flu and most coughs.
R is amoeba which is responsible for causing amoebic dysentery.
Question 3
1 / -0

Which of the following is a ciliated organism?

A
Amoeba

B
Paramecium

C
Yeast

D
Streptococcus

Solution

Paramecium is a unicellular organism, commonly studied as a representative of the ciliate group.
Question 4
1 / -0

Which of the following is false about 'fungi'?

A
They are made of fine thread-like structures called hyphae.

B
Most of them feed on dead things.

C
They look like plants.

D
They can synthesise their own food.

Solution

Fungi are saprophytic. They feed on dead plants and animals. Fungi cannot synthesise their own food.
Question 5
1 / -0

Refer to the following diagram and select the correct answer from the options given below.

A
In A, yeast feeds on sugar to release alcohol and carbon dioxide.

B
The process that occurs in A is called aerobic respiration.

C
The gas that is released in A can turn lime water milky on entering B.

D
Both 1 and 3 are correct.

Solution

The process shown is fermentation. Yeast feeds on sugar to release alcohol and carbon dioxide. Carbon dioxide can turn lime water milky.
Question 6
1 / -0

What is the mode of nutrition of fungi?

A
Autotrophic

B
Saprophytic

C
Parasitic

D
Heterotrophic

Solution

Fungi show saprophytic mode of nutrition. They feed on dead and decaying organic matter.
Question 7
1 / -0

Which of the following bacteria helps to fix the atmospheric nitrogen in the root nodules of leguminous plants?

A
Rhizobium

B
Rhizopus

C
E. coli

D
Mucor

Solution

Rhizobium is a bacteria that fixes nitrogen after becoming established inside the root nodules of legumes.
Question 8
1 / -0

Where can viruses reproduce?

A
Both inside and outside the cell

B
Only outside the cell

C
Only inside a living cell

D
Only inside a plant cell

Solution

Viruses can reproduce inside any living cell, whether plant or animal cell.
Question 9
1 / -0

Which of the following organisms is used to convert milk into curd?

A
Mycobacterium

B
Salmonella

C
Lactobacillus

D
Penicillium

Solution

When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd is added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid.

Question 10

1 / -0

Study the following table and select the correct option for P, Q, R and S:

Disease	Causative Microorganism	Mode of Transmission
Tuberculosis	Bacteria	P
Q	Bacteria	Water/Food
R	Virus	Water
Malaria	S	Mosquito

P: Air; Q: Cholera; R: Hepatitis B; S: Protozoan

P: Water; Q: Typhoid; R: Chicken pox; S: Virus

P: Water; Q: Measles; R: Typhoid; S: Bacterium

P: Food; Q: AIDS; R: Chicken Pox; S: Protozoan

Solution

The mode of transmission of tuberculosis is air. The causative agent of cholera is bacteria and it spreads through contaminated water and food. Hepatitis is caused by a virus and spreads through water contaminated with faeces. The causative agent of malaria is a protozoan called Plasmodium.

Question 11
1 / -0

Which of the following is not a communicable disease?

A
Cholera

B
Common cold

C
Chicken pox

D
Anaemia

Solution

Anaemia is not a communicable disease. It is caused by the deficiency of iron.
Question 12
1 / -0

Which of the following is a set of diseases caused by viruses in human beings?

A
Small pox, Dysentery, Malaria

B
Influenza, Mumps, Polio

C
Chicken pox, Dengue, Typhoid

D
Tuberculosis, Rabies, AIDS

Solution

Mumps is a viral illness caused by a paramyxovirus.
Polio, or poliomyelitis, is a crippling and potentially deadly infectious disease. It is caused by the poliovirus.
Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus.
Question 13
1 / -0

Which of the following diseases generally occurs in summers during the rainy season due to bad personal hygiene and poor sanitation?

A
Common cold

B
Polio

C
Rabies

D
Gastroenteritis

Solution

Gastroenteritis is inflammation of the gastrointestinal tract that involves the stomach and small intestine. It is generally caused due to bad personal hygiene and poor sanitation especially during the rainy season.
Question 14
1 / -0

Directions For Questions

...view full instructions

Directions: Refer to the Venn diagram given above and choose the common mode of transmission X.

A
Air

B
Water

C
Fomites

D
Insect bites

Solution

Polio, typhoid and dysentery are all transmitted by water. Polio is a viral disease, typhoid is a bacterial disease and dysentery is a protozoan disease.
Question 15
1 / -0

Directions For Questions

...view full instructions

The discoverer of procedure shown in picture also developed the technique of

A
curd making

B
antibiotic treatment

C
vaccination

D
pasteurisation

Solution

The process in the picture is fermentation. Louis Pasteur discovered fermentation in 1857. He also developed the technique of pasteurisation for the preservation of milk.
Question 16
1 / -0

Directions For Questions

...view full instructions

Directions: Refer to the diagram above and choose the correct characteristic of X.

A
X is always multicelluar.

B
X may either be unicellular or multicellular.

C
X is always unicellular.

D
X does not posses cellular structure.

Solution

Rust and smut are caused by fungus. Thus, X is fungus. Fungus causing rust and smut are never unicellular. Fungus are always multicellular, except for yeast. Fungus get transmitted by air or seeds.
Question 17
1 / -0

Directions For Questions

...view full instructions

Directions: Four types of microorganisms are shown above. Select the correct statement from the options given below.

A
Functioning of D is governed by the nucleus present in it.

B
C causes diseases only in plants.

C
B performs photosynthesis.

D
A causes air borne diseases.

Solution

A is amoeba that resides in water. It causes food and water borne diseases.
B is Chlamydomonas. Chlamydomonas is a genus of green algae consisting of chlorophyll to perform photosynthesis.
C is Penicillium that causes diseases in both plants and animals.
D is a virus and virus has no organelle. Therefore, nucleus is not present in it.
Question 18
1 / -0

Directions For Questions

...view full instructions

Directions: Refer to the flow chart on preservation and choose the correct option.

A
C is the method of preservation used for squashes.

B
A reduces the moisture content for preservation.

C
B process is carried out for 30 min.

D
D uses sodium lauryl sulphate

Solution

A is the method which utilises sugar. Sugar reduces the moisture content which inhibits the growth of bacteria which spoil food.
B is pasteurisation. Pasteurisation is the process of heating up milk to a high temperature for a short time and then cooling it down again quickly.
C is a salting method. This method is not used for sweet food preparations, like squashes.
D is used for the preparation of sauce. Sodium lauryl sulphate is not used in the preparation of sauce.
Question 19
1 / -0

Directions For Questions

...view full instructions

Directions: Refer to the above flow chart and choose the correct statement.

A
B breeds in flowing water.

B
A is the carrier of tuberculosis bacteria.

C
A inserts the pathogen by biting.

D
Bite of B can be prevented by nets and repellents.

Solution

Bite of B can be prevented by nets and repellents. B is mosquito as it is a carrier of malaria and dengue. It breeds in stagnant water. Nets and repellents are used as protection to avoid mosquito bite.
Question 20
1 / -0

Directions For Questions

...view full instructions

Directions: Refer to the Venn diagram.

If A are diseases transmitted through air and B are diseases transmitted through water, then AB is

A
cholera

B
malaria

C
chicken pox

D
polio

Solution

AB is polio. Poliovirus is very contagious. It enters the body through the mouth due to faecally contaminated water or food. It can also spread by droplets from a sneeze or cough.