The Gram (-) bacteria detect and respond to the chemicals in their surroundings by
muramic acid
lipopolysaccharide
volutin granules
porin
D.
porin
In cell wall of Gram-negative bacteria, the peptidoglycan layer is very thin. The outer membrane is a bilayered structure consisting chiefly of phospholipids, proteins and lipo-polysaccharides. The permeability of outer membrane to nutrients is provided by proteins called porins, which form channels in the membrane.
Which type of membrane is most abundant within a cell?
ER membrane
Nuclear membrane
Golgi membrane
Plasma membrane
The resolving power of a compound light microscope will be greatest if the source of light is
blue
green
yellow
red
In which method of transport, in plasma membrane does not require carrier molecule?
Active transport
Facilitated diffusion
Simple diffusion
Na+ - K+ pump
Mesophyll cells, which liberate malic acid at night time, are of :
C4 - plants
C3 - plants
C2 - plants
C1 - plants
Primary and secondary active transport both
generate ATP
use ATP directly
can move solutes against their concentration gradient
include the passive movement of glucose molecule
Which structure is present in both prokaryotic and eukaryotic plant cells?
Cell wall
Nucleus
Chloroplast
Mitochondria
Small particles projecting from the inner membranes and cristae of mitochondria are known as
myeloid bodies
microsomes
informosomes
oxysomes
