Please help me with 37, 39, 41 and 42.
Answers
37) pH= -log[]
so more the concentration of hydrogen ions less will be the pH value, more acidic will be the solution.
» Buffering system reduces the tendency of change of pH in solution.
> it will less the 'H ions' to reduce acidic character and it will add the 'H ions' to reduce the basic character.
> (1) option is correct.
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39) see the above image for protein structure!
» you'll observe that amino acids are formed by no. of these assymetric Carbons joined by peptide bonds.
》 all the carbons will have amino,carboxyl,hydrogen and a designated 'R' group.
》the different amino acid will vary acc. to the R group varies in them.
•(D) option is correct, depends on the type of R group.
• the no. of R group doesn't count as there will be always one R group in the Carbon and others will be NH2,H,COOH.
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41) proteins are involve in enzyme activity,hormone secretion, they are structural units of tissue,eg, muscles, they are also acts as the carrier proteins channels in plasma membrane to transport substances.
» But they are not the storage of genetic information, yes, we can say that they are the result of the genetic,
information present in the mRNA, and after the translation process occurs, they are result of the binding of different molecules acc. to sequence present in RNA.
» if we break the protein, we cannot find the Bonds of A,T,G,C nucleotides
but yes, they are the result of these arrangement.
» C) is the right one.
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42) golgi complex and ER are close association with each other,
ER makes the protein, Golgi modifies and packed it for secretion mostly in the form of glycolipids and glycoproteins.
》 E) is the answer.
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