Potato Spindle Tuber disease is caused by –
Which of the following statement is incorrect?
a. Viroids are smaller than viruses.
b. Viroid was found to be a free RNA.
c. The RNA of the viroid is of high molecular weight.
d. In 1971, T.O. Diener discovered it.
Which of the following disease is not caused by Prions?
a. Bovine spongiform encephalopathy (BSE) in cattles
b. Cr–Jacob disease (CJD) in humans.
c. Mad cow disease in cattle
d. Potato Spindle Tuber disease
Which of the following statement is correct?
a. Fungi prepare food for algae.
b. Fungi provide shelter and absorb mineral nutrients and water for its partner.
c. The algal component is known as mycobiont and fungal component as phycobiont,
d. Lichens are symbiotic associations between algae and fungi which are heterotrophic and autotrophic, respectively.
Select the right match -
a. Aplanospore Non-motile Exogenous
b. Conidia Motile Endogenous
c. Zoospore Motile Endogenous
d. Zygospore Motile Exogenous
. Identify the figure and the labellings A and B.
a. Bacteriophage,A- dsDNA; B- Capsid
b. TMV; A- dsDNA; B- Capsomere
c. TMV; A- ssDNA; B- Capsid
d. TMV; A- ssRNA; B- Capsid
Identify the correct labellings.
a. A- head, B- Collar, C- Sheath, D- Tail
b. A- head, B- Collar, C- Neck, D- Tail fibre
c. A- head, B- Collar, C- Sheath, D- Tail fibre
d. A- head, B- Neck, C- Sheath, D- Tail fibre
Identify the following pictures (b) and (c).
a. b- Aspergillus; c- Mucor
b. b- Aspergillus; c- Agaricus
c. b- Agaricus; c- Mucor
d. b- Mucor; c- Agaricus
Which of the following pathogenic disease could have the symptoms like mosaic formation, leaf rolling and curling, yellowing and vein clearing, dwarfing and stunted growth?
d. Deficiency syndrome.
Which of the following statement is incorrect with respect to capsid?
a. Capsid is the outermost covering of most of the viruses.
b. Capsid is made up of capsomeres.
c. Capsid protects the genetic material
d. Capsomeres are arranged in random geometric forms.