MCQ Questions for Class 12 Chemistry Chapter 14 Biomolecules Part-2 with Answers

Biomolecules Part-2 Class 12 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 14 Biomolecules Part-2 with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided Biomolecules Part-2 Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 14 Quiz

Class 12 Chemistry Chapter 14 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Chemistry Chapter 14 Biomolecules Part-2 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Biomolecules Part-2 Class 12 Chemistry MCQ online test

Q1.	In cellulose, D-glucose units are joined by
	A.α-1, 4 glycosidic linkage
	B.β-1, 6 glycosidic linkage
	C.β-1, 4 glycosidic linkage
	D.peptide linkage

Ans: β-1, 4 glycosidic linkage

Q2.	The anomeric carbon in D (+) glucose is
	A.C-1 carbon
	B.C-2 carbon
	C.C-5 carbon
	D.C-6 carbon

Ans: C-1 carbon

Q3.	Glucose Product is
	A.hexanoic acid
	B.gluconic acid
	C.saccharic acid
	D.bromohexane

Ans: gluconic acid

Q4.	How many C-atoms are there is a pyranose ring?
	A.3
	B.5
	C.6
	D.7

Ans: 6

Q5.	Cellulose is a
	A.hexapolysaccharide
	B.pentapolysaccharide
	C.tripolysaccharide
	D.None of these

Ans: None of these

Q6.	The letter ‘D’ in carbohydrates signifies
	A.dextrorotatory
	B.configuration
	C.diamagnetic nature
	D.mode of synthesis

Ans: configuration

Q7.	A diabetic person carries a packet of glucose with him always, because
	A.glucose increases the blood sugar level slowly
	B.glucose reduces the blood sugar level
	C.glucose increases the blood sugar level almost instantaneously
	D.glucose reduces the blood sugar level slowly

Ans: glucose increases the blood sugar level almost instantaneously

Q8.	Among the naturally occurring carbohydrates, furanose ring is found in the
	A.Glucose unit of cane sugar
	B.Glucose unit of cellulose
	C.Fructose unit of cane sugar
	D.Galactose unit of lactose

Ans: Fructose unit of cane sugar

Q9.	The given structure (I) and (II) represent configuration of the simplest sugar glyceraldehyde. Which of the following statements is not correct for the structures?
	A.I represents D-form while II represents L-form of glyceraldehyde
	B.The sugars having same configuration as D- glyceraldehyde are designated as D-sugars
	C.Natural glucose and fructose are D-forms
	D.D is dextrorotatory while L is laevorotatory enatiomer

Ans: D is dextrorotatory while L is laevorotatory enatiomer

Q10.	Amino acids generally exist in the form of Z witter ions. This means they contain
	A.Basic – NH₂ group and acidic – COOH group
	B.The basic – NH₃ group and acidic – COO^– group
	C.Basic -NH₂ and acidic – H⁺ group
	D.Basic – COO^– group and acidic – NH₃ group

Ans: Basic – COO^– group and acidic – NH₃ group

Q11.	Globular proteins are present in
	A.blood
	B.eggs
	C.milk
	D.all of these

Ans: all of these

Q12.	Which one of the amino acids can be synthesised in the body?
	A.Alanine
	B.Lysine
	C.Valine
	D.Histidine

Ans: Alanine

Q13.	Which of the following is not true about amino acids?
	A.They are constituents of all proteins
	B.Alanine having one amino and one carboxylic group
	C.Most naturally occurring amino acids have D-configuration
	D.Glycine is the only naturally occuring amino acid which is optically inactive.

Ans: Most naturally occurring amino acids have D-configuration

Q14.	A compound which contains both ………… and ………… is called amino acid. The amino acids is polypeptide chain are joined by ………/ bonds.
	A.amino, carboxylic group, ester
	B.amino, carboxylic group, peptide
	C.nitrogen, carbon, glycosidic
	D.hydroxy, carboxylic group, peptide

Ans: amino, carboxylic group, peptide

Q15.	Denaturation of protein leads to loss of its biological activity by
	A.formation of amino acids
	B.loss of primary structure
	C.loss of both primary and secondary structure
	D.loss of both secondary and tertiary structures

Ans: loss of both secondary and tertiary structures

Q16.	Proteins are condensation polymers of
	A.α-amino acids
	B.β-amino acids
	C.α-hydroxy acids
	D.β-hydroxy acids

Ans: α-amino acids

Q17.	Mark the wrong statement about denaturation of proteins
	A.The primary structure of the protein does not change
	B.Globular proteins are converted into fibrous proteins
	C.Fibrous proteins are converted into globular proteins
	D.The biological activity of the protein is destroyed

Ans: Fibrous proteins are converted into globular proteins

Q18.	In fibrous proteins, polypeptide chains are held together
	A.van der waals forces
	B.electrostatic forces of attraction
	C.hydrogen bonds
	D.covalent bonds

Ans: hydrogen bonds

Q19.	Which type of interactions are responsible for making the a-helix structure stable?
	A.Peptide bonds between -NH₂ and -CO groups of adjacent carbon chain
	B.Hydrogen bonds between -NH of amino acid in the one turn with -CO of amino acid to adjacent turn
	C.-OH group of one amino acid with -CO group of other amino acid on the turn
	D.Hydrogen bonds between adjacent amino acids

Ans: Hydrogen bonds between -NH of amino acid in the one turn with -CO of amino acid to adjacent turn

Q20.	Secondary structure of protein refers to
	A.sequence of amino acids in polypeptide chain
	B.bonds between alternate polypeptide chains
	C.folding patterns of polypeptide chain
	D.bonding between NH\(_{3}^{+}\) and COO^– of two peptides