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The internal composition of the cell is maintained because the plasma membrane is selectively permeable to small molecules. A lot of biological molecules are unable to distribute by the phospholipid bilayer so the plasma membrane develops a barrier which blocks the free exchange of molecules between the cytoplasm and the external environment of the cell. Exact transport proteins carrier proteins and channel proteins then mediate the careful passage of small molecules across the membrane, permitting the cell to control the composition of its cytoplasm.
What proportion of children with Down syndrome do you expect when women with Down syndrome have children with men who have 46 chromosomes justify your answer?
Determine the Muscular-Skeletal System It is known we all do movement and these take place by movement of muscles in coordination with the skeletal system. In human body muscle
I nfe c tio u s bursal disease Infectious bursal disease (popularly known as Gumboro disease) is an acute contagious disease of young chicks caused by an RNA virus, a memb
Tetrasporic Embryo Sacs In this group neither of the meiotic divisions is accompanied by wall formation so that at the end of meiosis all the four haploid nuclei remain in a
A genomic DNA library is made from the genomic DNA of an organism. For instance, a mouse genomic library could be made by digesting mouse nuclear DNA with a restriction nuclease to
What is the activation center of an enzyme? Is it the key or the lock of the lock and key model? The activation center is a region of the enzyme formed by its spatial conformat
Minerals :- Manganese Food Source Whole grains, fruits, vegetables Nutritional Functional role Essential nutrient: Deficiency extremely rare. Enzyme cofactor
how to identified plants
Explain Alternate Photosynthetic Pathways? An alternate photosynthetic pathway is the C4 pathway, where plants incorporate carbon into four-carbon compounds instead of 3PG. Thi
DISEASE CONCERNED WITH KIDNEY - 1. Paget's disease - Abnormalities of kidney. 2. Uramia - Increases in quantity of urea. 3. Nephritis - Inflamation in glom
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