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Practice each question, then open the answer or worked solution.
Carbohydrates are classified on the basis of their behaviour on hydrolysis
and also as reducing or non-reducing sugar. Sucrose is a __________.
(i) monosaccharide
(ii) disaccharide
(iii) reducing sugar
(iv) non-reducing sugar
Option (ii) and (iv) are the answers.
Proteins can be classified into two types on the basis of their molecular shape
i.e., fibrous proteins and globular proteins. Examples of globular proteins are :
(i) Insulin
(ii) Keratin
(iii) Albumin
(iv) Myosin
Option (i) and (iii) are the answers
Which of the following carbohydrates are branched polymer of glucose?
(i) Amylose
(ii) Amylopectin
(iii) Cellulose
(iv) Glycogen
Option (i) and (iv) are the answers.
Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following is acidic?
Option (ii) and (iv) are the answers.
Lysine is _______________.
(i) α-Amino acid
(ii) Basic amino acid
(iii) Amino acid synthesised in the body
(iv) β-Amino acid
Option (i), (ii) and (iii) are the answers.
Which of the following monosaccharides are present as five-membered cyclic
structure (furanose structure)?
(i) Ribose
(ii) Glucose
(iii) Fructose
(iv) Galactose
Option (i) and (iii) are the answers.
In fibrous proteins, polypeptide chains are held together by ___________.
(i) van der Waals forces
(ii) disulphide linkage
(iii) electrostatic forces of attraction
(iv) hydrogen bonds
Option (ii) and (iv) are the answers.
Which of the following are purine bases?
(i) Guanine
(ii) Adenine
(iii) Thymine
(iv) Uracil
Option (i) and (ii) are the answers.
Which of the following terms are correct about enzymes?
(i) Proteins
(ii) Dinucleotides
(iii) Nucleic acids
(iv) Biocatalysts
Option (i) and (iv) are the answers.
III. Short Answer Type
Name the sugar present in milk. How many monosaccharide units are present
in it? What are such oligosaccharides called?
The sugar present in milk is lactose. Lactose contains two monosaccharides, glucose and galactose.
Oligosaccharides containing two monosaccharide units are called disaccharides.