Certain infectious particles lack nucleic acids yet cause diseases. Which of the following correctly describes the infectious agent and a disease it causes?
Viroids; Potato spindle tuber disease
Prions; Creutzfeldt-Jakob disease
Viruses; Tobacco mosaic disease
Lichens; Athlete's foot
Related Questions
Which type of nucleic acid constitutes the genetic material of a viroid?
RNA
DNA
Both RNA and DNA
Neither RNA nor DNA
Which of the following organisms are typically the first to colonize bare rocks in primary succession?
Lichens
Mosses
Grasses
Shrubs
ds RNA is found in
Reovirus
TMV
Ο Γ174
None of these
Lichens are composite organisms consisting of a fungus and a photosynthetic partner (algae), growing together in a symbiotic relationship Consider the following statements about lichensI. Lichen are very good air pollution indicatorsII. Algal partner and fungal partner live mutuallyIII. Algae prepares food for fungiIV. Fungi provides shelter and absorbs water and minerals for algal partnerWhich of the statements given above are correct?
I, II and III
II, III and IV
I, II and IV
I, II, III and IV
Which of the following is NOT a characteristic of viroids?
Circular single-stranded RNA
Smaller than viruses
Infectious in plants
Presence of a protein coat
The genome of bacteriophage can be
Single-stranded DNA, Single-stranded RNA, Double-stranded DNA, or Double-stranded RNA
Only Double-stranded DNA
Only Single-stranded RNA
Double-stranded DNA or Single-stranded RNA
In plants, mosaic formation, leaf rolling and curling yellowing and vein clearing are the symptoms of
Viral diseases
Bacterial diseases
Protozoan diseases
Fungal diseases
The agents which are known to cause CJD are
Protein particles
A class of bacteria
A class of viruses
Fungi
The symbiotic relationship between fungi and algae is called
Lichen
Mycorrhiza
Helotism
Mutualism
Mendel's experiments DISPROVED which of the following concepts?
Genes exist in pairs.
Some traits are dominant over others.
Blending inheritance
Traits can be inherited independently.
