Biochemistry is the study of the chemical processes occurring in living matter.
Active transport moves molecules across the plasma membrane of a cell with the help of transport proteins and energy (ATP).
Active transport is the means of transport of molecules across the plasma membrane with the help of energy. This method is usually used for the transport of molecule against their concentration gradient, i.e., from lower concentration to higher concentration.
Plasma membrane is the outer layer surrounding the cell. It is made up of lipid bilayer, proteins, carbohydrates and cholesterol. The lipid bilayer is amphipathic since the lipid head is hydrophilic and its tail is hydrophobic. The plasma membrane is semi-permeable in nature.
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Ecotourism
d. increases biodiversity by providing income to areas that might otherwise be destroyed
Explanation:
Ecotourism refers to visiting of undisturbed natural areas.
Ecotourism is different from other tourism on the fact that it does not involve visit to an area which is maintained by humans.
Ecotourists spots are allowed to grow naturally so that they can drag people who really want to enjoy the nature.
Ecotourist spots are protected areas and taxes are levied on them.
Ecotourist spots call for tourists and gives native people ,a way of earning.
This forces the people to maintain these spots and hence biodiversity is conserved.
Asbestos fiber accumulate in the <em>lysosomes.
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Option: (b)
<u>Explanation:
</u>
Asbestos is a natural group of minerals and it is composed of thin and needle-like fibers. An asbestos causes several diseases like cancers and so on, including asbestosis and mesothelioma.
Although asbestos extend and fireproofs materials, this materials are banned in ‘many countries’. But asbestos are not banned in the United States.
Lysosomes are important part of the ‘endomembrane system’ because lysosomes are formed from the ‘endoplasmic reticulum’ and these products are synthesized and processed by the ‘Golgi’.
