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which of the following is not a process that may provide an adaptive advantage to eukaryotic
the bases in dna have carbon-nitrogen ring structures due to the nitrogen atoms they are known as nitrogenous bases there are two parts of ring
the deoxyribonucleic acid or also called as dna molecules are informational molecules encoding the genetic instructions used in the functioning and
the major function of the nerve cells of the body is contact this is accomplished by passing electrical and chemical messages from neuron to neuron
hydrophilic and some lipophilic hormones bind to cell surface receptors these are necessary membrane proteins located in the
in multicellular organisms there is a requirement for the cells to communicate with one another in order to coordinate their metabolism and
signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor in words this receptor change intracellular
clathrin-coated pits and vesicles are included in both the endocytosis of material at the plasma membrane and the exocytosis of
phagocytosis is the ingestion of huge particles like as bacteria and cell debris by large endocytic vesicles called as phagosomes in order to
endocytosis is the uptake of extracellular macromolecules across the plasma membrane into the cell the objects to be ingested is
nuclear transport is an energy-dependent process mediated through saturable receptors export and import receptors are by to distinguish and bind to
the movement of na and glucose from the lumen of the intestine across the epithelial cell to the blood sets up a
the passive transport of molecules across a membrane does not require an input of metabolic energy rate of the diffusion or transport is proportional
a pure phospholipid bilayer with its hydrophobic interior is permeable to water and gases such as o2 co2 n2 and small
the internal composition of the cell is maintained because the plasma membrane is selectively permeable to small molecules a lot of biological
the cytosolic surface of the erythrocyte plasma membrane is covered through a network of peripheral
the peripheral membrane proteins are less strongly bound to the lipid bilayer than integral membrane proteins and can be
since erythrocytes red blood cells do not hold any sub cellular organelles they are essentially a membranous sac for carrying
membrane proteins are classify as either integral intrinsic or peripheral extrinsic depending on how tightly they are linked with membrane the
the carbohydrate sets are covalently attached to various variant proteins to form glycoproteins carbohydrates are a shorter percentage of the weight
the cell membrane is a slim semi-permeable membrane which surroundings the cytoplasm of a cell membrane function is to defend the integrity of the
while describing normalising selection it was said that in uniform environments selection limits the variability of populations and evolves a genetic
directional or progressive selection is the mode of selection associated with environmental change we said earlier that in an unchanging environment
theodosius dobzhansky and boris spassky demonstrated the working of normalising selectioion a behavioural trait in two populations of drosophida
an interesting observation made by an american biologist hc bumpus 1899 provides a good explanation for normalising selection bumpus collected some