Biological Classification - Online Test
Q1. A plant that is partially heterotrophic is
Answer : Option B
Explaination / Solution:
Drosera plant is partially heterotrophic. This plants capture insects to fulfill its protein requirement although it performs photosynthesis also.
Q2. Who demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants?
Answer : Option A
Explaination / Solution:
Beijerinek is considered one of the founders of virology. In 1898, he published results on the filtration experiments demonstrating that tobacco mosaic disease is caused by an infectious agent smaller than a bacterium and called the fluid as Contagiumvivum fluidum(infectious living fluid).
Q3. The outer protein covering of virus is
Answer : Option C
Explaination / Solution:
A capsid is the protein shell of a virus. It consists of several oligomeric structural subunits made of protein called protomers. The capsid encloses the genetic material of the virus.
Q4. The genetic material of virus is
Answer : Option C
Explaination / Solution:
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded.
The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein.
Q5. Diener discovered
Answer : Option A
Explaination / Solution:
T.O. Diener discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease.
It was found to be a free RNA.
it lacked the protein coat that is found in viruses, hence the name viroid.
Q6. A peculiar group of dual organism which are formed by an association between an algae and a fungus.
Answer : Option C
Explaination / Solution:
A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi in a symbiotic relationship. The combined lichen has properties different from those of its component organisms.
Q7. Which possess acellular structure?
Answer : Option A
Explaination / Solution:
A bacteriophage is a virus that infects and replicates within a bacterium.
Except bacteriophage, all possess cellular structure.
Q8. Which is NOT the characteristic of viroids?
Answer : Option A
Explaination / Solution:
Viroids are smaller than viruses and caused potato spindle tuber disease. It was found to be a free RNA; it lacked the protein coat that is found in viruses, hence the name viroid. The RNA of the viroid was of low molecular weight.
Q9. The name virus was given by
Answer : Option B
Explaination / Solution:
The name virus that means venom or poisonous fluid was given by Pasteur. They are inert outside specific host and living inside the host cell. Viruses are obligate parasites.
Q10.
Identify the virus in figure given below
Answer : Option B
Explaination / Solution:
A bacteriophage is a virus that infects and replicates within a bacterium.Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have relatively simple or elaborate structures.
