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
Identify bacteriophage.
- (a)
Algae
- (b)
Virus
- (c)
Protozoa
- (d)
Fungi
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
The moist bread becomes mouldy after a few days when it is left in a container with a cover. Which of the following conditions favour the growth of the fungus?
- (a)
Absence of light
- (b)
Absence of water
- (c)
Presence of sunlight
- (d)
Presence of carbon dioxide
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
What process takes place when yeast is added to grape juice and left for a week?
- (a)
Decomposition
- (b)
Fermentation
- (c)
Distillation
- (d)
Oxidation
Which of the following is/are the functions performed by the microorganisms in the field of biotechnology?
- (a)
The production of bioplastic
- (b)
The production of hormones
- (c)
Gene therapy
- (d)
Both (B) and (C)
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
Identify the disease that is caused by protozoa.
- (a)
Cholera
- (b)
Malaria
- (c)
Jaundice
- (d)
Hepatitis 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 causes Cholera?
- (a)
Streptococcus
- (b)
Clostridium
- (c)
Pasteurella
- (d)
Vibrio
Which of the following fungi have given one of the greatest drugs to the world of medicine?
- (a)
Penicillium notatum
- (b)
Ustilago maydis
- (c)
Colletotrichum falcatum
- (d)
Alternaria solani
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 microorganisms causes common cold?
- (a)
Bacteria
- (b)
Virus
- (c)
Protozoa
- (d)
Algae
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
Through which of the following modes do most of the infectious diseases spread?
- (a)
Body contact
- (b)
Air
- (c)
A vector
- (d)
All of these
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 is the largest bacteria?
- (a)
Bacillus
- (b)
Coccus
- (c)
Spirillum
- (d)
Spherical
What helps in differentiating 'Spirogyra' from 'paramoecium'?
- (a)
Mitochondria
- (b)
Golgi bodies
- (c)
Nucleus
- (d)
Plastids
Which of the following organisms can perform photosynthesis?
- (a)
Euglena
- (b)
Paramecium
- (c)
Mucor
- (d)
Mushroom
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