A phosphoglyceride is always made up of
only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
only an unsaturated fatty acid esterified to glycerol molecule to which a phosphate group is also attached
a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
Pigment-containing memberanous extensions in cyanobacteria are
heterocysts
basal bodies
pneumatophores
pneumatophores
The complex formed by a pair of synapsed homologous chromosomes is called
equatorial plate
kinetochore
bivalent
bivalent
Which of the following criteria dows not pertain to facilitate transport?
Requirement of special membrane proteins
High selectivity
Transport saturation
Transport saturation
D.
Transport saturation
Facilitated transport is a form a passive transport in which materials are moved across the plasma membrane by a transport protein down. Their concentration gradient. It requires integral membrane proteins and highly selective biological membranes to cross.
Saturation occurs in facilitated, diffusion because not enough carriers may be available to handle all the free solute molecules. The rate of movement may reach a maximum. Uphill transport is a process in which diffusion of a component occurs from a less concentrated permeable stream.
The first stable product of fixation of atmospheric nitrogen in leguminous plants is
NO2-
ammonia
NO3-
NO3-
Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
Glucose-6-phosphate
Fructose 1, 6-biphosphate
Pyruvic acid
Pyruvic acid