Which one of the following is the only genus of bacteria that lacks Cell wall:
a) Cyanobacteria
b) Rhizobium
c) Mycoplasma
d) Mycobacteria
Periscope is an application of:
a) Dispersion
b) Refraction
c) Reflection
d) Total integral reflection
The process in which the DNA of a cell is duplicated to make two similar copies of the parent DNA is named as:
a) Replication
b) Transcription
c) Transition
d) Magnification
Oxygen has six electron in its outermost shell, so the valence of the oxygen is:
a) 1
b) 2
c) 3
d) 4
A large, thin walled, elastic and muscular sac lies dorsal to the ventricle is :
a) Sinus Venosus
b) Atrium
c) Epicardium
d) Conus arteriosus
The type of coal containing lowest carbon is:
a) Lignite
b) Bituminous
c) Anthracite
d) Peat
Explanation: Lignite: Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Lignite has a low heating value and a high moisture content and is mainly used in electricity generation.
