15413.The Gram negative bacteria detect and respond to chemicals in their surrounding by
Lipopolysaccharide
Muramic acid
Porins
Volutin granules
15416.Which of the following groups of organisms are ecologically similar?
Consumer protists and fungi
Monerans and producer protists
Producer protists and consumer protists
Monerans and fungi
15417.The Phages that show lysogenic cycle are called
Lytic phages
Virulent phages
Temperate phages
None of these
15418.DNA is not present in one of the following
Bacteriophage
Tobacco Mosaic Virus
Mitochondria
Chloroplast
15419.ELISA is used to detect viruses where the key reagent is
DNA probe
Catalase
Alkaline phosphatase
RNase
15420.Which one of the followings is a viral disease?
Wilting of cabbage
Leaf roll of potato
Red rot of sugar cane
Damping-off disease of seedlings
15421.Which one of the following enzymes is present in the bacteriophage?
Succinic dehydrogenase
Lysozyme
Protease
Urease
15423.Human insulin is being commercially produced from a transgenic species of
Escherichia
Saccharomyces
Rhizobium
Mycobacterium
15424.A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably above to form
Endotoxins
Endospores
A thick peptidoglycan wall
Endogenous buds
15426.The bacterium (Clostridium botulinum) that causes botulism is
A facultative aerobe
An obligate anaerobe
A facultative anaerobe
An obligate aerobe
15427.Which of the following is a bacteriophage?
Bacteria infecting viruses
Vibrio bacteria
Virus inhabiting in bacteria
Cyanobacteria
15428.The tobacco mosaic virus (TMV) is approximately ___ in size.
300 × 18 nm
3000 × 5 nm
800 × 10 nm
700 × 30 nm
15429.Which one of the following viruses contains both DNA and RNA?
Cyanophage
Herpes Virus
Leuko Virus
Polio Virus
15430.Viruses are no more "alive" than isolated chromosomes because
They both require oxygen for respiration
They both need food molecules
They require both RNA and DNA
Both require the environment of a cell to replicate
15431.A T-series bacteriophage can be recognized by its
irregular shape
rounded shape
tadpole shape
rhomboidal shape
15432.Which one of the following statements about viruses is correct?
Viruses are obligate parasites
All viruses contain both RNA and DNA
Viruses possess their own metabolic system
Nucleic acid of viruses is known as Capsid