Introduction to Microorganisms
Trending Questions
Q.
Can microorganisms be seen with the naked eye? If not, how can they be seen?
Q.
Which of the following statements are true about microbes?
Most of the microbes can be observed through naked eyes.
Blue-green algae were the first photosynthetic organisms on Earth.
Penicillin is produced by fungi.
Paramecium produces an antibiotic named streptomycin.
Q. __________ were the first living organisms on Earth
- Microbes
- Humans
- Dinosaurs
- Steller's sea cow
Q. Any harmful disease-causing microorganisms are termed as _______.
- antibodies
- vectors
- mosquitoes
- pathogens
Q. Good microbes prevent the growth of harmful bacteria in our body.
- False
- True
Q. Which of the following statements regarding microorganisms is not true?
- Microorganisms are found nearly everywhere
- Microorganisms act as decomposers in the ecosystem
Microorganisms commonly have a single cell
- Microorganisms are visible to the naked eye.
Q.
Define the following.
Microscopic organism
Q.
What Is In A Prokaryotic Cell?
Q. Living organisms which cannot be seen by our naked eyes are known as:
- Mammals
- Microorganisms
- Amphibians
- Reptiles
Q. are organisms that have cell organelles and a well-defined nucleus.
- Bacteria
- Prokaryotes
- Eukaryotes
Q. Microbes generate half the oxygen we breathe.
- False
- True
Q. The first life on earth started with
- Archaea
- Bacteria
- Virus
- Algae
Q. Which of the following are eukaryotic cells?
- Yeast
- Amoeba
- Archaea
- Escherichia coli
Q.
Which of the following is Chlamydomonas?
Q. Give the correct sequence in which life evolved on Earth.
- Microbes
- Fish
- Dinosaurs
- Humans
Q. were the precursors of life on Earth.
- Viruses
- Archaea
- Algae
- Fungi
Q. Match the following diseases correctly with their possible symptoms.
- Yellow spots
- Brown spots
- Skin ulcers
Q. is the process in which micro-organisms breakdown carbohydrates into alcohols or acids and/or carbon dioxide.
- Pickling
- Fermentation
- Refrigeration
Q. Carefully read the following reactions carried out by nitrifying bacteria. Identify the statement about these equations which is not true.
2NH3+3O2 → 2NO−2 +2H+ +2H2O ---- (I)
2NO−2+O2 → 2NO−3 ---- (II)
2NH3+3O2 → 2NO−2 +2H+ +2H2O ---- (I)
2NO−2+O2 → 2NO−3 ---- (II)
- Both the steps occur only in photoautotrophs
- Step I is carried out by Nitrosomonas or Nitrosococcus
- Both the steps I and II can be called nitrification
- Step II is carried out by Nitrobacter
Q. increased the level of oxygen on Earth from 0-10%.
- Algae
- Cyanobacteria
- Fungi
Q.
The study of microorganisms is called ___.