Answer the following questions :
(i) Name any two good sources of vitamin A.
(ii) What are nucleotides ?
(iii) Given one example of fat soluble vitamins.
(iv) How are carbohydrates classified ?

(i) What are nucleosides and nucleotides? (ii) Name one water soluble vitamin.

(i) What type of linkage is present in nucleic aocds ? (ii) Given one example each of water soluble and far soluble vitammins.

Answer the following questions: (i) Why are vitamin A and vitamin C essential for us? (ii) What is the difference between a nucleoside and a nucleotide?

Study the given map and answer the following questions: (i) Name the nations having high density of population in Asia. (ii) Name the nations having less than one person of pupulation density. (iii) Give appropriatge reasons for the above two questions.

(a) What are vitamins ? Given the important source of vitamin A. (b) What are tetrasaccharides ? Give one example. (c ) What is peptide linkage ? Given two functions of proteins.

Study the given figure and answer the following questions: Name any two line segments inside the triangle ABC.

(a) What type of linkage is present in proteins ? (b) Give one example each of water soluble and fat soluble vitamins. (c ) Draw pyranose structure of glucose.