MCQs of Biology – Chemical Building Blocks of Life

Which statement is correct for biomolecules?

Carbohydrates, lipids and proteins are formed from their basic building blocks by:

The most immediate source of energy for living cells is generally in the form of:

Which of the following functions is more characteristic of carbohydrates than of proteins?

Which one is hexose sugar?

Maltose, Lactose and sucrose are:

Glycogen is most structurally similar to:

Which of the following is produced only by plants?

Chitin is found in:

Chitin is a structural polysaccharide and is polymerized from:

Chitin is chemically a polymer of:

Which one of the following is an example of glycoprotein?

The feature that most ditinguishes a lipid from a carbohydrate is that a lipid has:

The amphiphilic lipids of a cell membrane are called:

A saturated fat is one to which no more ___________ atoms can be added:

Among the energy values of nutrients, 9.3 calories is that of:

Lipids are generally:

Amino acids are joined by a unique type of bond called a/an:

A peptide bond is formed between two amino acids by the reaction of the _________ of one amino acid with the _______ of the other:

The basis of life is:

Which statement is correct?

Nucleoside is:

Nucleotides are:

Nucleotides include:

A denatured protein or DNA molecule has lost its:

RNA differs from DNA in having:

Predominant form of lipid present in biomembrances:

__________ are to proteins as _________ are to nucleic acids:

The arrangement of a polypeptide into a fibrous or globular shape is called its:

The sequence of amino acids in a protein molecule is dictated by the: