Organisms having either peptide Bonds or phosphodiester Bonds but not Both
I) Viroids II) Viruses III) Prions IV) Bacteria
I, II
III, IV
II, III
I, III
Related Questions
Which of the following group of diseases is caused by viruses?
Mumps, smallpox, herpes, influenza
AIDS, diabetes, herpes, tuberculosis
Anthrax, cholera, tetanus, tuberculosis
Cholera, tetanus, smallpox, influenza
Which statement contradicts Mendel's findings regarding the inheritance of traits?
Traits are determined by discrete units called genes.
Offspring inherit an average of their parents' traits.
Some alleles are dominant while others are recessive.
Alleles segregate during gamete formation.
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
Pick out the wrong statement
Lichens are symbiotic associations
Lichens are very good pollution indicators
Lichens do not grow in unpolluted areas
The algal component of lichen is known as phycobiont
The sub-unit of capsid is called
Capsomere
Core
Nucleoside
Nucleotide
I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco
II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum
III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein
The above statements are assigned to
Bacteria
Virus
Prions
Lichens
Which of the following statements accurately describes viroids?
Small, circular, single-stranded RNA molecules without a protein coat
Small, linear, double-stranded DNA molecules enclosed in a protein coat
Small, circular, single-stranded DNA molecules without a protein coat
Small, linear, double-stranded RNA molecules enclosed in a protein coat
TMV was first crystallised by
Beijerinck
Pasteur
W.M.Stanley
Franklin
A term ‘helotism’ is used for the symbiosis of
Algae and fungi
Algae and Cycas
Algae and bacteria
Pinus and fungi
Who crystallised and isolated viruses for the first time?
WM Stanley
FC Bawden
KM Smith
DJ lvanowsky
