Viroids discovered by Diener (1971) are ...

Viroids discovered by Diener (1971) are infectious agents and cause diseases in plants only. They differ from viruses in being

naked ssDNA molecules without protein coat

naked ssRNA molecule of 250-400 nucleotides without protein coat

naked DNA packaged with viral genome

satellite DNA packaged with viral genome

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

BIODIVERSITT AND CONSERVATION
TRUEMAN BIOLOGY|Exercise MULTIPLE CHOICE QUESTIONS|112 Videos
BIOTECHNOLOGY : PRINCIPLES AND PROCESSES
TRUEMAN BIOLOGY|Exercise MULTIPLE CHOICE QUESTIONS|134 Videos

Similar Questions

Explore conceptually related problems

Viroids differ from viruses in having

Name two diseases caused by viruses in crop plants.

[A] : Subviral infectious agents are called viroids . [R] : Viroids cause persistent infections .

Give one example of the disease caused each by fungi, bacteria and viruses in crop plant.

Go through the following statements (i) In geometric growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and mature. (ii) The ability of plants to follow different pathways in response to environment or phases of life to form different kinds of structures, is called plasticity. (iii) The mathematical expression for arithmetic growth is Lt = L_0 + rt while for geometric growth, it is W_1=W_0=W_(0)e^(rt) (iv) The form of growth wherein new cells are always being added to the plant body by the activity of the meristem, is called the open form of growth. Which of these are correct .

[A] : Disease reduce the vitality of plants , inhibit their development and cause different morphological and physiological aberrations . [R] : The diseases result in the death of a plant .

Assertion : Thick cuticle is mostly present in disease resistant plants. Reason : Disease causing agents cannot grow on cuticle and cannot invade the cuticle.

Given below are a few statements regarding somatic hybridization. Choose the correct statements. (i) Protoplasts of different cells of the same plant are fused. (ii) Protoplasts from cells of different species can be fused. (iii) Treatment of cells with cellulase and pectinase is mandatory. (iv) The hybrid protoplast contains characters of only one parental protoplast.

TRUEMAN BIOLOGY-BIOLOGICAL CLASSIFICATION-MULTIPLE CHOICE QUESTIONS

Prions are composed largely of
Text Solution
|
The Nobel Prize of 1997 went tofor the study of prions (the causal age...
Text Solution
|
Viroids discovered by Diener (1971) are infectious agents and cause di...
Text Solution
|
RNA particles causing symptoms like that of a viral disease are known ...
Text Solution
|
Bovine Spongiform Encephalopathy (BSE) disease is related to which hum...
Text Solution
|
Which of the following is plant viral disease?
Text Solution
|
AIDS was first reported in
Text Solution
|
Mumps (inflammation of parotid salivary gland) is a
Text Solution
|
Potato tuber spindle disease is caused by
Text Solution
|
Common cold, the most contagious disease is due to
Text Solution
|
Which one is not a viral disease of animals ?
Text Solution
|
Who cultured the virus (Polio virus) for the first time in human cells
Text Solution
|
Potato leaf roll and Papaya leaf curl are due to
Text Solution
|
HIV/oncogenic viruses/retroviruses are dangerous and cause disorder in
Text Solution
|
The virus replicated in arthropod, whith is its intermediate host and ...
Text Solution
|
Viruses are not affected by antibiotics because
Text Solution
|
Name the group of viruses causing dengue fever and yellow fever.
Text Solution
|
Dengue (the break-bone fever) is spread by
Text Solution
|
Which method is followed for virus elimination in plants
Text Solution
|
The immunological protein particles which restrict viral reinfection b...
Text Solution
|