The answer should be Non banded grains
Answer: A. ionic
In ionic bonds electron are transferred from one atom to another. In ionic bonds , the metal atom loses electrons to become positively charged cation whereas the nonmetal atom accepts those electrons to become negatively charged anion.
The primary driving force that stabilizes lipid bilayers is the formation of hydrophobic bonds between fatty acid chains in phospholipids and protein.
The cell membrane is made up of phospolipid bilayer with proteins embedded in between
Lipid bilayer is the structure present in the biological membrane. It consist of two layers of lipids with hydrophilic end facing each other and hydrophobic end facing the outer side.
the inner layer has both the hydrophobic end of the lipid molecules facing each other and bonded by hydrophobic bond van der waals forces.
The outer molecules are bonded with the protein molecules through hydrophilic bonds called hydrogen bonds.
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Answer;
-B3
Explanation;
Refrigerants are divided into two groups according to toxicity:
-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or equal to 400 ppm; and
-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.
They are also divided into three groups according to flammability:
-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101 kPa;
-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3 at 21°C and 101 kPa and a heat of combustion of less than 19 kJ/kg;
-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa or a heat of combustion greater than or equal to 19 kJ/kg.
-Therefore; the answer for the above question would be Class B and class 3.
