Class 12 Chemistry Chapter 14 Biomolecules MCQs In English

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Class 12 Chemistry Chapter 14 Biomolecules MCQs In English

Q1.Which of the following compounds is found
abundantly in nature?

• (A) Fructose
• (B) Starch
• (C) Glucose
• (D) Cellulose

Q2. Glycosidic linkage is an

• (A) amide linkage
• (B) ester linkage
• (C) ether linkage
• (D) acetyl linkage

Q3. Starch is composed of two polysaccharides
which arc

• (A) amylopectin and glycogen
• (B) amylose and glycogen
• (C) amylose (20%) and amylopectin (80%)
• (D) cellulose and glycogen

Q4. Which reagent is used to convert glucose into
saccharic acid?

• (A) Br2/H2O
• (B) Nitric acid
• (C) Alkaline solution of iodine
• (D) Ammonium hydroxide

Q5. Maltose is made up of

• (A) two α-D-glucose
• (B) normal β-D-glucose
• (C) α- and β-D-glucose
• (D) fructose

Q6. Which of the following is an example of an
aldopentose?

• (A) D-Ribose
• (B) Glyceraldehyde
• (C) Fructose
• (D) Erythrose

Q7. Which of the following treatment will convert
starch directly into glucose?

• (A) Heating with dilute H2SO4
• (B) Fermentation by diastase
• (C) Fermentation by zymase
• (D) Heating with dilute NaOH

Q8. The a-and p-forms of glucose are

• (A) isomers of D (+) glucose and L (-) glucose
  respectively
• (B) diastereomers of glucose
• (C) anomers of glucose
• (D) isomers which differ in the configuration of
  C-2

Q9. What are the hydrolysis products of sucrose?

• (A) Fructose + Fructose
• (B) Glucose + Glucose
• (C) Glucose + Galactose
• (D) D-Glucose + D-Fructose

Q10. Carbohydrates are stored in human body as
the polysaccharide

• (A) starch
• (B) glycogen
• (C) cellulose
• (D) amylose

Class 12 chemistry chapter 14 mcq questions and answers pdf

Q11. The conversion of maltose into glucose is
possible by the enzyme

• (A) zymase
• (B) lactase
• (C) maltase
• (D) diastase

Q12. Which of the following is a non-reducing
sugar?

• (A) Glucose
• (B) Sucrose
• (C) Maltose
• (D) Lactose

Q13. Which one of the following is not correct?

• (A) D(-) Fructose exist sin furanose structure
• (B) D (+) Glucose exists in pyranose structure
• (C) In sucrose the two monosaccharides are
  held together by peptide linkage
• (D) Maltose is a reducing sugar

Q14. 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

Q15. The anomeric carbon in D (+) glucose is

• (A) C-1 carbon
• (B) C-2 carbon
• (C) C-3 carbon
• (D) C-4 carbon

Objective Question with Answer for Biomolecules Class 12 Chemistry

Q16. How many C-atoms are there is a pyranose
ring?

• (A) 4
• (B) 5
• (C) 6
• (D) 8

Q17. The letter ‘D’ in carbohydrates signifies

• (A) dextrorotatory
• (B) configuration
• (C) diamagnetic nature
• (D) mode of synthesis

Q18. 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

Q19. 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

Q20. Globular proteins are present in

• (A) blood
• (B) eggs
• (C) milk
• (D) all of these

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Class 12 Chemistry Objective Question In English

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CBSE Class 12 Chemistry Biomolecules MCQs in English