Olympiad Science - Microorganisms
Exam Duration: 45 Mins Total Questions : 30
Which of the following is the smallest microorganisms?
- (a)
Algae
- (b)
Bacterium
- (c)
Protozoan
- (d)
Virus
Identify W, X and Y
- (a)
W X Y Virus Protozoan Fungus - (b)
W X Y Algae Bacterium Virus - (c)
W X Y Virus Fungus Protozoan - (d)
W X Y Fungus Algae Bacterium
Which of the following statements describes bacteriophage correctly?
- (a)
It is a bacterium which causes diseases in plants.
- (b)
It is a type of virus which attacks bacteria.
- (c)
It is a bacterium which kills viruses.
- (d)
It can multiply inside both living and non-living cells.
Fungi reproduces by
- (a)
Fission
- (b)
Fusion
- (c)
Seed formation
- (d)
Spore formation
Which of the following characteristics places algae in the group of autotroph?
- (a)
Carrying out anaerobic respiration
- (b)
Manufacturing their own food
- (c)
Feeding on dead organisms
- (d)
Feeding on other living organisms
Which of the following microorganisms play an important role in maintaining the balance of nitrogen gas in the atmosphere?
- (a)
Viruses
- (b)
Bacteria
- (c)
Algae
- (d)
Protozoa
What causes the dough to rise when yeast is added to it?
- (a)
An increase in temperature
- (b)
An increase in the amount of substance
- (c)
An increase in the amount of released water by yeast cells
- (d)
The release of carbon dioxide gas
Which of the following enzymes is secreted by bacteria that can digest cellulose?
- (a)
Amylase
- (b)
Cellulase
- (c)
Lipase
- (d)
Protease
Which of the following is/are produced by using bacteria?
- (a)
Antibiotics
- (b)
Cheese
- (c)
Yoghurt
- (d)
All of these
Which of the following terms is given to the microorganisms that cause diseases?
- (a)
Antigens
- (b)
Antibodies
- (c)
Pathogens
- (d)
Vectors
Which of the following disease causing pathogens is/are carried by mosquitoes?
- (a)
Dengue fever
- (b)
Malaria
- (c)
Cholera
- (d)
Both (A) and (B)
Identify the disease that is caused by protozoa.
- (a)
Cholera
- (b)
Malaria
- (c)
Jaundice
- (d)
Hepatitis B
Which of the following options is/are true about the diseases, microorganisms which cause them and the symptoms of the diseases?
- (a)
Malaria, Protozoan, Fever and Chills
- (b)
Hepatitis B, Virus, Swollen liver
- (c)
Cholera, Virus, Vomiting, diarrhoea
- (d)
Both (A) and (B)
Which of the following can affectively prevent the ringworm disease?
- (a)
Vaccination
- (b)
Vector control
- (c)
Improving personal hygiene
- (d)
Using antibiotics
Which of the following bacteria lives symbiotically in pea plants?
- (a)
Rhizobium
- (b)
Nitrosomonas
- (c)
Azotobacter
- (d)
Clostridium
Which of the following bacteria causes Cholera?
- (a)
Streptococcus
- (b)
Clostridium
- (c)
Pasteurella
- (d)
Vibrio
Which one of the following is called pond silk?
- (a)
Spirogyra
- (b)
Volvox
- (c)
Chlamydomonas
- (d)
Euglena
Which of the following is the characteristic feature that distinguishes an algae from fungi?
- (a)
Heterotrophic
- (b)
Autotrophic
- (c)
Parasitic
- (d)
Sporophytic
How does Entamoeba histolytica enter the human body?
- (a)
Through a mosquito bite
- (b)
Through Bird droppings
- (c)
Through Contaminated food and water
- (d)
Through a Sweat
Which of the following statements is true for viruses?
- (a)
Viruses multiply only in living host.
- (b)
Their crystals have a definite shape.
- (c)
Viruses grow and multiply by themselves outside the host.
- (d)
Viruses may be crystallized.
How are microorganisms useful to us?
- (a)
The production of chemical fertilizers
- (b)
The production of fireworks
- (c)
The production of soft drinks
- (d)
The production of antibiotics
A microorganism X is used in the making of bread. It is also used in making which of the following substances?
- (a)
Cheese
- (b)
Vinegar
- (c)
Wine
- (d)
Yoghurt
Which of the following is represented by 'X' in the figure given below?
- (a)
Protozoa
- (b)
Bacteria
- (c)
Viruses
- (d)
Algae
Which of the following substances is/are produced by an organism to prevent or reduce the spread of microorganisms?
- (a)
Antiseptics
- (b)
Antibiotics
- (c)
Antibodies
- (d)
All of these
Which of the following organisms have an ability to help in recycling of nutrients and energy?
- (a)
Bacteria
- (b)
Diatoms
- (c)
Virus
- (d)
Fungi
What helps in differentiating 'Spirogyra' from 'paramoecium'?
- (a)
Mitochondria
- (b)
Golgi bodies
- (c)
Nucleus
- (d)
Plastids
Which of the following microorganisms are used in making antibiotics?
- (a)
Viruses
- (b)
Fungi
- (c)
Bacteria
- (d)
Both (B) and (C)
Observe the given figure and identify P, Q, Rand S.
- (a)
P-Coccus, Q-Bacillus, R-Vibrio, S-Spirillum
- (b)
P-Bacillus, Q-Coccus, R-Spirillum, S-Vibrio
- (c)
P-Bacillus, Q-Vibrio, R-Coccus, S-Spirillum
- (d)
P-Bacillus, Q-Spirillum, R-Vibrio, S-Coccus
Which of the following pair is correct?
- (a)
Pathogens Diseases caused Viruses Dengue fever - (b)
Pathogens Diseases caused Bacteria Malaria - (c)
Pathogens Diseases caused Fungi Hepatitis - (d)
Pathogens Diseases caused Protozoa Syphilis
Which of the following microorganisms exhibit symbiotic life?
- (a)
Lichens
- (b)
Volvox
- (c)
Blue green algae
- (d)
Spirogyra