AP 8th Class Biology Bits Chapter 3 Story of Microorganisms 1 with Answers

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AP State Syllabus 8th Class Biology Bits 3rd Lesson Story of Microorganisms 1 with Answers

Question 1.
Lactobacillus present in
A) Curd
B) Milk
C) Butter
D) All of these
Answer:
A) Curd

Question 2.
One of the following added to dough for preparing bread
A) Agar
B) Clostridium
C) Yeast
D) Bacillus
Answer:
C) Yeast

Question 3.
…………. gas is released during fermentation.
A) Carbon dioxide
B) Hydrogen
C) Sulphur
D) All of these
Answer:
A) Carbon dioxide

Question 4.
Sugars are converted into ……….. by yeast
A) Proteins
B) Fats
C) Alcohol
D) None of these
Answer:
C) Alcohol

Question 5.
One of the following helps in curing the disease.
A) Antibiotics
B) Pain killers
C) Nutrients
D) Antigens
Answer:
A) Antibiotics

Question 6.
Immediate effect on disease are
A) Tablets
B) Syrups
C) Injections
D) All of these
Answer:
D) All of these

Question 7.
The word vaccine comes from “vaca” which means
A) Cat
B) Horse
C) Cow
D) Cattle
Answer:
C) Cow

Question 8.
About 78% of air around us is
A) Oxygen
B) Hydrogen
C) Carbon
D) Nitrogen
Answer:
C) Carbon

Question 9.
Citrus canker of lemon is caused by
A) Virus
B) Bacteria
C) Protozoa
D) Insects
Answer:
B) Bacteria

Question 10.
Food poisoning is due to consumption of
A) Fresh fruits
B) Spoiled food
C) Raw food
D) Bad air
Answer:
B) Spoiled food

Question 11.
Pencillin was discovered in this year
A) 1929
B) 1932
C) 1917
D) 1940
Answer:
A) 1929

Question 12.
Dr. Y. Subba Rao discovered the following.
A) Vaccine
B) Ampicillin
C) Tetracycline
D) B.C.G
Answer:
C) Tetracycline

Question 13.
Rabies vaccine was discovered by
A) Jenner
B) Pasteur
C) Leeuwenhoek
D) Robert Hooke
Answer:
B) Pasteur

Question 14.
Small pox virus was discovered by
A) Pasteur
B) Flemming
C) Jenner
D) Jonas Salk
Answer:
C) Jenner

Question 15.
The vaccine that prevents Tuberculosis is
A) MMR
B) DPT
C) B.C.G
D) E.C.G
Answer:
C) B.C.G

Question 16.
Folic Acid discovery is associated with the following scientists
A) Jenner
B) Pasteur
C) Y. Subba Rao
D) Flemming
Answer:
C) Y. Subba Rao

Question 17.
Sugars are converted into alcohols by
A) Bacteria
B) Fungus
C) Yeast
D) Algae
Answer:
C) Yeast

Question 18.
Dengue and Chikungunya are spread by
A) Air
B) Water
C) Food
D) Mosquitoes
Answer:
D) Mosquitoes

Question 19.
Sir Ronald Ross was awarded with Nobel Prize in the year
A) 1901
B) 1903
C) 1904
D) 1902
Answer:
D) 1902

Question 20.
Tikka disease can be seen in
A) Sugarcane
B) Groundnut
C) Paddy
D) Sorghum
Answer:
B) Groundnut

Question 21.
Food poisoning is due to this bacteria
A) Typhe
B) E-coli
C) Clostridium botulinum
D) Lactobacillus
Answer:
C) Clostridium botulinum

Question 22.
Choose the correct matching from the following.
List – A — List – B
i) Polio — a) B.C.G
ii) T.B — b) D.P.T
iii) Pertusis — c) Oral polio vaccine
A) i – b, ii – c, iii – a
B) i – c, ii – b, iii – a
C) i – b, ii – a, iii – c
D) i – c, ii – a, iii – b
Answer:
D) i – c, ii – a, iii – b

Question 23.
Choose the mismatched pair from the following.
i) Varticella – Measles
ii) MMR – Mumps
iii) Tet – vac – Tetanus
A) ii, iii
B) iii only
C) i, ii
D) i only
Answer:
D) i only

Question 24.
This is also known as “Triple Antigen”
A) BCG
B) ECG
C) Tet-vac
D) DPT
Answer:
D) DPT

Question 25.
Vaccine for Polio was discovered by
A) Flemming
B) Jonas Salk
C) Y. Subba Rao
D) Jenner
Answer:
B) Jonas Salk

Question 26.
The word ‘Vaca’ is derived from vaccine, which means
A) Disease
B) Sheep
C) Cow
D) Medicine
Answer:
C) Cow

Question 27.
Microorganisms which cause diseases are called
A) Vectors
B) Pathogens
C) Vaccines
D) Insects
Answer:
B) Pathogens

Question 28.
Milk is preserved by a method called
A) Sterilization
B) Pasteurization
C) Mineralization
D) None
Answer:
B) Pasteurization

Question 29.
Plasmodium causes this disease
A) AIDS
B) Typhoid
C) Malaria
D) Hepatitis
Answer:
C) Malaria

Question 30.
The disease of food poisoning is called
A) Botulism
B) Tetanus
C) Pertusis
D) Mumps
Answer:
A) Botulism

Question 31.
This disease is completely eradicated from the world
A) AIDS
B) Malaria
C) Chicken pox
D) Measles
Answer:
D) Measles

Question 32.
Dr. Ronald Ross discovered that female mosquito was the carrier for plasmodium. This discovery was made in this city
A) Kolkata
B) Mumbai
C) Secunderabad
D) Goa
Answer:
C) Secunderabad

Question 33.
We should spray the following in the stagnated water pools to prevent the mosquito population?
A) Coconut oil
B) Kerosene
C) Olive oil
D) Water
Answer:
B) Kerosene

Question 34.
Housefly acts as carrier for
A) Typhoid
B) Cholera
C) Amoebiasis
D) All the above
Answer:
D) All the above

Question 35.
Dr. Edward Jenner discovered Smallpox vaccine in this year
A) 1780
B) 1785
C) 1789
D) 1796
Answer:
D) 1796

Question 36.
Ritwik added some yeast powder to sugar solution and kept it for a day. The next day he will observe that
A) The solution tastes salty and has no smell
B) The solution turns into bluish black
C) The solution remains unchanged
D) The solution smells like alcohol and bubbles are seen on top
Answer:
D) The solution smells like alcohol and bubbles are seen on top

Question 37.
Bacteria present in curd is
A) Lactobacillus
B) Microbacterium tuberculosis
C) Vibrio comma
D) Salmonella
Answer:
A) Lactobacillus

Question 38.
The bacterium that is used as pesticide
A) E-coil
B) Lactobacillus
C) Bacillus thuringiensis
D) Stephalococus
Answer:
C) Bacillus thuringiensis

Question 39.
Identify the microorganism present in the picture.

A) Anabina
B) Nostoc
C) E – coli
D) Yeast
Answer:
B) Nostoc

Question 40.
Identify the microorganism

A) Anabina
C) E – coli
B) Nostoc
D) Yeast
Answer:
A) Anabina

Question 41.
The sheep in this picture, are suffering from

A) Food and mouth disease
B) Anthrax
C) Encephalitis
D) None
Answer:
B) Anthrax

Question 42.
I am used as antibiotic. Who am I?

A) Yeast
C) Spirulina
B) E – coli
D) Pencillin
Answer:
D) Pencillin

Question 43.

Name the labelled parts of the yeast ………
A) Daughter cells
B) Buds
C) Micro yeast
D) None
Answer:
B) Buds

Question 44.

Name the labelled parts of the picture
A) Roots
B) Stem
C) Nodules
D) None
Answer:
C) Nodules

Question 45.
Who saved the wine industry in France?
A) Jenner
B) Pasteur
C) Flemming
D) Y. Subba Rao
Answer:
B) Pasteur

Question 46.
“The germ theory of diseases” was proposed by
A) Jenner
B) Flemming
C) Jonas Salk
D) Pasteur
Answer:
D) Pasteur

Question 47.
The scientist associated with Anthrax vaccine
A) Jenner
B) Flemming
C) Y. Subba Rao
D) Pasteur
Answer:
D) Pasteur

Question 48.
Name the scientist who saved the silk industry in Germany and France …..
A) Flemming
B) Jenner
C) Robert Hooke
D) Pasteur
Answer:
D) Pasteur

Question 49.
Name the scientist, who experimen-tally proved that microorganisms could be killed by boiling in 1768
A) Pasteur
B) Jenner
C) Lazzaro Spallanzani
D) Flemming
Answer:
C) Lazzaro Spallanzani

Question 50.
Examples for Antibiotics
A) Tetracycline
B) Streptomycin
C) Erythromycin
D) All the above
Answer:
D) All the above

Question 51.
Tetracycline cures
A) Typhoid
B) Tuberculosis
C) Plague
D) AM the above
Answer:
D) AM the above

Question 52.
Oral polio vaccine was discovered by
A) Dr. Albert Sabin
B) Dr. Jonas Salk
C) Jenner
D) Flemming
Answer:
A) Dr. Albert Sabin

Question 53.
Match the following
Group – A — Group – B
i. Flemming — a) Anthrax vaccine
ii. Ross — b) First antibiotic
iii. Jonas salk — c) Smallpox
iv. Jenner — d) Anopheles
v. Pasteur — e) Aureomycin
f) Polio vaccine
A) i – c, ii – a, iii – d, iv – f, v – b
B) i – d, ii – b, iii – a, iv – c, v – f
C) i – a, ii – c, iii – f, iv – d, v – b
D) i – b, ii – d, iii – f, iv – c, v – a
Answer:
D) i – b, ii – d, iii – f, iv – c, v – a

Question 54.
The disease septicemia is caused by
A) Bacteria
B) Virus
C) Protozoan
D) Fungi
Answer:
A) Bacteria

Question 55.
Name the bacterium that exhibits symbiotic relation with Leguminous plants
A) Lactobacillus
B) Bacillus Thuringeinsis
C) Xanthomonas
D) RMzobium
Answer:
D) RMzobium

Question 56.
What will happen if we use vaccines containing strong or potent disease causing microorganisms?
A) There are high chances of getting infected with the disease.
B) More antibodies will be developed and we will be protected against the disease.
C) More useful microorganisms will grow in the intestine.
D) All the bacteria – both useful and harmful will be destroyed in the body.
Answer:
A) There are high chances of getting infected with the disease.

Question 57.
Ambika has a milk factory, they carry out pasteurisation of milk. During this process, milk is heated upto 70 degrees C for 15 to 30 seconds and then stored. This prevents growth of most micro-organisms.
Which of the following activities also uses heat for controlling the growth of microbes
A) Raju is a businessman and he packs dry fruits in a air tight container for a long journey.
B) Radha is a chef and makes jams by adding sugar to cooked fruit.
C) David is a doctor and he sterilises the materials for surgery in his sterilisation chamber.
D) Salim is a farmer and sprays pesticides on his crops.
Answer:
C) David is a doctor and he sterilises the materials for surgery in his sterilisation chamber.

Question 58.
Which of the following may be caused by consumption of antibiotics?
A) Food poisoning can occur
B) Useful microorganisms in the intestine may be killed
C) Conversion of sugar into alcohol by fermentation
D) Development of antibodies against disease causing microbes
Answer:
B) Useful microorganisms in the intestine may be killed

Question 59.
Which of the following diseases are affected with virus?
A) Typhoid, Diarrhoea
B) Malaria, Amoebiasis
C) Conjunctivitis, Chicken pox
D) Heart Diseases
Answer:
C) Conjunctivitis, Chicken pox

Question 60.
Match the following.
1) Red rot disease — a) Sheep
2) Anthrax — b) Hen
3) Birdflu — c) Sugarcane
A) 1 – a, 2 – b, 3 – c
B) 1 – b, 2 – a, 3 – c
C) 1 – c, 2 – a, 3 – b
D) 1 – b, 2 – c, 3 – a
Answer:
C) 1 – c, 2 – a, 3 – b

Question 61.
Rabies disease is caused by
A) The mosquito bite
B) The bite of dog
C) Injuries
D) Contaminated food
Answer:
B) The bite of dog

Question 62.
Study the following statements and find out which is the correct one.
I) We take vaccine when we are suffering from fever
II) To prevent polio we must take antibiotic
A) I – is wrong, II – is correct
B) I and II are correct
C) Both are wrong
D) I – is correct and II – is wrong
Answer:
C) Both are wrong

Question 63.
The foot of buffalo effected with a disease, it can’t walk properly. What disease it would be?
A) Anthrax
B) Small pox
C) Rabies
D) Hoof and mouth
Answer:
D) Hoof and mouth

Question 64.
Choose the suitable question for a doctor to know about the uses of vaccines in our body.
A) We will be healthy by taking vaccine?
B) Is vaccines are more useful than antibiotics?
C) How vaccines are work in our body?
D) Are we effect by the fever by taking vaccine?
Answer:
C) How vaccines are work in our body?

Question 65.
Which of the following would be followed by you to keep away from the diseases?
A) I drink boiled water
B) I take food when it is hot
C) I keep my premises clean
D) All above
Answer:
D) All above

Question 66.
Which microorganism are used in preparation of cake in Bakery?
A) Yeast
B) Lactobacillus
C) Virus
D) Rhizopus
Answer:
A) Yeast

Question 67.
To protect your health which precautions would be taken
A) Take preserved drinking water in the bottles
B) Take boiled water
C) Use tap water for drinking
D) Drink well water.
Answer:
B) Take boiled water

Question 68.
Which of the following diseases mainly spreads through air?
A) Tuberculosis
B) AIDS
C) Typhoid
D) Malaria
Answer:
A) Tuberculosis

Question 69.
Disease-causing microorganisms are killed directly by consuming
A) Antiseptics
B) Antibiotics
C) Vitamin supplements
D) Curd
Answer:
B) Antibiotics

Question 70.
Find the mosaic disease from the following picture.

Answer:
D)

Question 71.
What will happen if you add yeast to dough in the following?
1) Decrease in temperature
2) An increase in the volume of substance
3) An increase in the amount of released water by yeast cells
4) The release of CO₂ gas
A) 1,2 only
B) 2, 3 only
C) 2, 4 only
D) 4 only
Answer:
C) 2, 4 only

Question 72.
An example of a microorganism that is a friend of farmer
A) Rhizobium
B) Lactobacillus
C) Penicillin
D) Amoeba
Answer:
A) Rhizobium

Question 73.
The first vaccine discovered by this scientist in the year
A) Edward Jenner-1696
B) Ronald Ross-1796
C) Edward Jenner-1796
D) Louis Pasteur -1696
Answer:
C) Edward Jenner-1796

Question 74.
Find the mis-match.
A) Root nodules – rhizobium
B) Malaria-virus
C) Citrus canker-virus
D) Red rot of sugar cane – fungi
Answer:
B) Malaria-virus

Question 75.
Typhoid, cholera, diarrhoea, dysentery and jaundice are
A) Water borne diseases
B) Air borne diseases
C) Both
D) None
Answer:
A) Water borne diseases

Question 76.
The bacteria which symbioses with legume plant are
A) Rhyzobium
B) Clostridium
C) Lactobacillus
D) Penicillin
Answer:
A) Rhyzobium

Question 77.
Which one of these is preserved in pasteurisation method?
A) Fruit Juices
B) Milk
C) Food
D) Meat
Answer:
B) Milk

Question 78.
Antibiotics are used to kill the Micro-organisms which are cause for dis¬eases. Antibiotics prepared from
A) Fungi
B) Algae
C) Protozoan
D) Bacteria
Answer:
A) Fungi

Question 79.
Legume plants have root nodules. Rhizobium bacteria is present in the root nodules. The bacterium provides nitrates to the plant, which gives shelter to the bacterium. This relationship is called
A) Symbiosis
B) Parasitism
C) Autotrophic nutrition
D) Correlation
Answer:
A) Symbiosis

Question 80.
The microorganism which turns milk into curd
A) Lactobacillus
B) Rhizopus
C) Plasmodium
D) Spirogyra
Answer:
A) Lactobacillus

Question 81.
Read the following sentences about viruses. Identify the wrong statement.
A) They are big in size than bacteria
B) Causative organism for Swineflu and Polio
C) They are the link between living and non-living organisms
D) They are the causative microbes for the diseases both in plants and animals
Answer:
A) They are big in size than bacteria

Question 82.
Read the following statements.
P) Vaccines are used to prevent the diseases.
Q) Anti-bodies for causative microorganisms produced in the body by vaccination.
In the above sentences.
A) P is correct and Q is correct explanation
B) P is incorrect but Q is correct explanation
C) P is correct but Q is incorrect explanation
D) P is incorrect and Q is also incorrect explanation
Answer:
A) P is correct and Q is correct explanation

Question 83.
The first scientist who proved that microorganism could be killed by boiling?
A) Louis Pasteur
B) Lazzaro Spallanazani
C) Alexander Flemming
D) Yellapreggada Subba Rao
Answer:
C) Alexander Flemming

Question 84.
Read the names of the diseases given below.
Small pox, Hepatitis, Mumps, Tetanus, Whooping cough
A) all are skin diseases
B) all are occured by bacteria
C) vaccines are discovered for all the above diseases
D) they occur only in adults
Answer:
C) vaccines are discovered for all the above diseases

Question 85.
Which of the following questions are suitable to clarify your doubts on contageous diseases?
A) Why do diseases occur?
B) What happens when we are affected by a disease?
C) Why is fever not a contaminated disease?
D) What precautions do we follow to avoid contaminated diseases?
Answer:
D) What precautions do we follow to avoid contaminated diseases?

(86-88) Look at the picture and answer the questions.

Question 86.
Which of the material is added to myda dough in the experiment?
A) Bacteria
B) Yeast
C) Baking soda
D) Iodine
Answer:
B) Yeast

Question 87.
What is the name of the process occured in the experiment?
A) Transpiration
B) Condensation
C) Fermentation
D) Diffusion
Answer:
C) Fermentation

Question 88.
Which gas is released in the experiment?
A) Oxygen
B) Carbondioxide
C) Nitrogen
D) Hydrogen
Answer:
B) Carbondioxide

Question 89.
Ravi mixed yeast to sugar solution. What changes may be observed by him?
a) It turned into Alcohol
b) Oxygen gas is released
c) CO₂ will release
d) Cold drink is prepared
Which of the above are correct?
A) a and c
B) a and b
C) a and d
D) None of the given
Answer:
A) a and c

Question 90.
You want to give suggestions to your villagers for the prevention of diseases, which of the following are correct?
A) Should not eat contaminated food
B) Drink safe and clean water
C) Keep the surrounding environment clean
D) All the given
Answer:
D) All the given

Question 91.
To avoid spoiling of pickles at my home, I have to Martm
A) Open the lid and keep open the Jar
B) Mix with salt, chilli powder and oil
C) Shall keep in moisture place
D) Heating it frequently
Answer:
B) Mix with salt, chilli powder and oil