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Practice each question, then open the answer or worked solution.
Each polypeptide is a protein that has amino acids linked with each other in a
specific sequence. This sequence of amino acids is said to be ____________.
(i) primary structure of proteins.
(ii) secondary structure of proteins.
(iii) the tertiary structure of proteins.
(iv) quaternary structure of proteins.
Option (i) is the answer.
DNA and RNA contain four bases each. Which of the following bases is not
present in RNA?
Option (iii) is the answer.
Which of the following B group vitamins can be stored in our body?
Option (iv) is the answer.
Which of the following bases is not present in DNA?
Option (iv) is the answer.
Three cyclic structures of monosaccharides are given below, which of these are anomers.
Option (i) is the answer.
Which of the following reactions of glucose can be explained only by its cyclic
structure?
Option (iii) is the answer.
Optical rotations of some compounds, along with their structures, are given below. Which of them has a D configuration?
Option (i) is the answer.
Structure of a disaccharide formed by glucose and fructose is given below.
Identify anomeric carbon atoms in monosaccharide units.
(i) ‘a’ carbon of glucose and ‘a’ carbon of fructose.
(ii) ‘a’ carbon of glucose and ‘e’ carbon of fructose.
(iii) ‘a’ carbon of glucose and ‘b’ carbon of fructose.
(iv) ‘f’ carbon of glucose and ‘f ’ carbon of fructose.
Option (iii) is the answer.
Three structures are given below in which two glucose units are linked. Which
of these linkages between glucose, units are between C1 and C4 and which
linkages are between C1 and C6?
Option (iii) is the answer.