8th Class Science Microorganisms : Friend and Foe Question Bank

done Self Test-9 Total Questions - 10

• question_answer1)
  Algae have unique features, which differentiate it from the rest of the microorganisms. Like, it is either unicellular or multicellular, it is autotrophic or heterotrophic. A unicellular algae having a glass like cell wall is:
  A)
   Diatoms done clear
  B)
   Blue green algae                done clear
  C)
   Prions done clear
  D)
   Chlamydomonas done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer2)
  We know that RNA is the first information storing molecule, which stores genetic information's and helps in transmission of character form one generation to the next. But, the primary method, in which genetic information is stored and transmitted from one generation to the next is:
  A)
   ATP done clear
  B)
   DNA done clear
  C)
   ADP done clear
  D)
   M-RNA done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer3)
  Certain plants have knob like structure, which helps in converting atmospheric nitrogen in nitrate or nitrite, to increase the nitrogen content of the soil. Such plants are called leguminous plants. These plants contain bacteria in its roots, which helps in this work. Which one of the following bacteria helps in doing this work?
  A)
   Rhizobium bacteria done clear
  B)
   Bacillus done clear
  C)
   Cocus done clear
  D)
   Salmonella typhi done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer4)
  There are different methods of reproduction in the microorganisms. For example. Amoeba reproduces by the binary fission. The microorganisms, which reproduce only inside the cell of the host organism is:
  A)
   Diatoms done clear
  B)
   Flagella done clear
  C)
   Virus done clear
  D)
   Rizophous done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer5)
  Microorganism causes various types of diseases, through air, water and through the contaminated foods. The causative agents are called pathogens. Which one of the following disease is caused by protozoans?
  A)
   Smallpox done clear
  B)
   TB done clear
  C)
   aids done clear
  D)
   Malaria done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer6)
  Given below are the few statements stating the facts about the microorganisms. Which one of the following facts is incorrect?
  A)
   Microorganism are helpful done clear
  B)
   Microorganism are dangerous done clear
  C)
   Microorganism are very small done clear
  D)
   Microorganisms can be seen by the naked eyes done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer7)
  It is the first ever plant cell that developed close associations with the fungi. It is also the first plant, which have the genetic fusion of two. Identify the figure given below:
  A)
   Lichens done clear
  B)
   Moss done clear
  C)
   Ordovician done clear
  D)
   Silurian done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer8)
  Different microorganisms reproduces by different methods. Identify the methods of reproduction in the microorganism given below in the figure:
  A)
   Endospore in bacteria done clear
  B)
   Fission is amoeba done clear
  C)
   Spore formation in fungus done clear
  D)
   Cell division in virus done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer9)
  This organism reproduces by sexual method, forming a heterokaryotic structure. It mostly grows on food particles and other eatables. Which one of the following microorganisms does the figure given below represents?
  A)
   Algae done clear
  B)
   Fungus done clear
  C)
   Virus done clear
  D)
   Bacteria done clear
  E)
   None of these done clear
  View Solution play_arrow

• question_answer10)
  Microorganism is used for the production of medicines and vaccines. Thus, they are the source of antibiotics. The first ever antibiotics was made by Alexander Fleming in 1929. Which one of the following antibiotics was first made by him?
  A)
   Streptomycin done clear
  B)
   Tetracycline done clear
  C)
   Penicillin done clear
  D)
   Erythromycin done clear
  E)
   None of these done clear
  View Solution play_arrow