i) How many peptide bonds are in a hexapeptide?
ii) Write the general structure of the Zwiter ionic form of an `alpha-` amino acid.
iii) Deficiency of which vitamin cause pernicious anemia?

Deficiency of which vitamin causes pernicious anemia.

Write the general formula of Zwitter ionic form of an amino acid

(i) Write the Zwitter ion form of an alpha -amino acid. (ii) Name the naturally occurring alpha -amino acids that is not optically active.

(i) What are non - essential amino acids ? (ii) Write zwitter ionic structure of "glycine "

(a) Write the Haworth structure of Maltose. (b) (i) Name a naturally occurring amino acid which is optically inactive. (ii) How many peptide bonds are present in a tripeptide? (c) Deficiency of which Vitamin causes Night blindness?

Consider two elements ‘A’ (Atomic number 17) and 'B' (Atomic number 19): (i) Write the positions of these elements in the modern periodic table giving justification. (ii) Write the formula of the compound formed when 'A' combines with 'B.' (iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.

Some of the elements and their atomic numbers are mentioned in the following table : (i) How many valence electrons are there in the element 'R' ? (ii) What is the valency of 'P' ? (ii) Write the chemical formula of the compound formed by combining the elements ‘P' and 'Q'? (iv) Out of the two elements 'P' and 'S', which one is larger in size ?

(a) Write Haworth structure of maltose. (b)What are non-essential amino acids? Name naturally occuring amino acid which is not optically active. (c) Which vitamin deficiency causes the disease 'scurvy'?