14) Review Cyclic Structure of Glucose and Linkages in Starch Glycogen

Students of class 12 Chemistry should refer to MCQ Questions Class 12 Chemical science Biomolecules with answers provided hither which is an of import affiliate in Class 12 Chemical science NCERT textbook. These MCQ for Class 12 Chemistry with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Course 12 Chemistry. The post-obit MCQs tin help you to do and get ameliorate marks in the upcoming class 12 Chemistry exam

Chapter 14 Biomolecules MCQ with Answers Form 12 Chemistry

MCQ Questions Class 12 Chemistry Biomolecules provided below have been prepared by expert teachers of grade 12. These objective questions with solutions are expected to come in the upcoming Standard 12 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. Which one of the post-obit compounds is establish abudnantly in nature?
(a) Fructose
(b) Starch
(c) Glucose
(d) Cellulose

Question. A carbohydrate that cannot exist hydrolysed into simpler units is called
(a) polysaccharides
(b) trisaccharides
(c) disachharides
(d) monosaccharides

Question. 3 cyclic structures of monosaccharides are given below which of these are anomers.

(a) I and Ii
(b) II and III
(c) I and III
(d) III is anomer of I and Ii

Question. Which amid the following is the simplest sugar?
(a) Glucose
(b) Starch
(c) Cellulose
(d) None of these

Question. Which of the following statements is not true about glucose?
(a) It is an aldohexose.
(b) On heating with Hullo it forms n-hexane.
(c) It is nowadays in furanose grade.
(d) It does not give 2,4-DNP exam.

Question. Which of the post-obit is a disaccharide ?
(a) Lactose
(b) Starch
(c) Cellulose
(d) Fructose

Question. The sugar that is characteristic of milk is
(a) maltose
(b) ribose
(c) lactose
(d) galactose

Question. Optical rotations of some compounds along with their structures are given below which of them have
D configuration.

(a) I, Two, III
(b) 2, III
(c) I, II
(d) Three

Question. Which of the following reactions of glucose tin exist explained but by its cyclic structure?
(a) Glucose forms pentaacetate.
(b) Glucose reacts with hydroxylamine to form an oxime.
(c) Pentaacetate of glucose does not react with hydroxylamine.
(d) Glucose is oxidised by nitric acrid to gluconic acid.

Question. Which of the following reaction confirms the presence of carbonyl group (> C—O) in glucose?
(a) Reaction with HI
(b) Reaction with hydroxylamine
(c) Reaction with HCN
(d) Both (b) and (c)

Question. DNA and RNA incorporate iv bases each. Which of the post-obit bases is not nowadays in RNA?
(a) Adenine
(b) Uracil
(c) Thymine
(d) Cytosine

Question. The presence or absence of hydroxyl group on which carbon cantlet of carbohydrate differentiate RNA and Deoxyribonucleic acid
(a) 2d
(b) 4th
(c) 3rd
(d) 1st

Question. Fructose reduces Tollens' reagent due to
(a) Primary alcoholic group
(b) Asymmetric carbons
(c) Secondary alcoholic groups
(d) Enolisation of fructose followed by conversion to aldehyde past base

Question. Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing carbohydrate. Sucrose is a __________.
(a) monosaccharide
(b) disaccharide
(c) reducing sugar
(d) non-reducing carbohydrate

Question. Milk changes afterwards digestion into
(a) cellulose
(b) fructose
(c) glucose
(d) lactose

Question. Which one of the following is an ester ?
(a) Coconut o il
(b) Kerosene oil
(c) Lather
(d) Glycerine

Question. Which of the following does non form an oxime?
(a) Glucose
(b) Glucose pentaacetate
(c) Arabi nose
(d) Galactose

Question. Vitamin B_{half dozen} is known as
(a) Pyridoxin
(b) Thiamine
(c) Tocopherol
(d) Riboflavin

Question. Glucose molecule reacts with 'X' number of molecules of phenyl hydrazine to yield osazone. The value of 'Ten' is
(a) iv
(b) one
(c) two
(d) three

Question. Which set of terms correctly identifies the carbohydrate shown?

I. Pentose
II. Hexose
Three. Aldose
Iv. Ketose
V. Pyranose
6. Furanose
(a) I, III and VI
(b) I, III and V
(c) 2, Iii and V
(d) Two, 3 and 6
(e) l, 4 and VI

Question. Diabetes is detected, using . . . . . . for testing mine of patients.
(a) Fehling's solution
(b) Tollen's reagent
(c) Benedict's solution
(d) Baeyer's reagent

Question. The anomeric carbon in D(+) glucose is
(a) C-one carbon
(b) C-2 carbon
(c) C-5 carbon
(d) C-6 carbon

Question. Glucose contains in addition to aldehyde group
(a) 1 secondary OH and four main OH groups
(b) i primary OH and four secondary OH groups
(c) two primary OH and three secondary OH groups
(d) 3 primary OH and two secondary OH groups

Question. Which of the post-obit indicates open chain construction of glucose?
(a) Pentaacetyl derivative of glucose
(b) Cyanohydrin formation with HCN
(c) Reaction with Fehling's solution
(d) Reaction with Tollen's reagent

Question. Complete hydrolysis of cellulose gives
(a) D-fructose
(b) D-ribose
(c) D-glucose
(d) L-glucose

Question. Which one of the following is an case of a not-reducing saccharide?
(a) Sucrose
(b) Lactose
(c) Maltose
(d) Cellobiose

Question. Methyl α-D-glucoside and methyl- β-D-glucoside are
(a) epimers
(b) anomers
(c) enantiomers
(d) conformational diastereomers

Question. Iodine examination is shown by
(a) glucose
(b) starch
(c) glycogen
(d) polypeptide

Question. Raffinose is
(a) trisaccharide
(b) disaccharide
(c) monosaccharide
(d) polysaccharide

Question. Glucose is a/an
(a) polyhydroxy ketone
(b) alcohol
(c) hydrate of carbon
(d) pentahydroxy aldehyde

Question. All monosaccharides …… Tollen's reagent.
(a) oxidises
(b) condense with
(c) reduces
(d) add to

Question. Cellulose is a polymer of
(a) glucose
(b) fructose
(c) ribose
(d) sucrose

Question. Lactose gives on hydrolysis
(a) glucose
(b) glucose and galactose
(c) fructose
(d) glucose and fructose

Question. Number of chiral carbon atoms in β-D-(+)- glucose is
(a) 5
(b) six
(c) three
(d) four

Question. Sucrose on hydrolysis gives
(a) glucose and maltose
(b) glucose and lactose
(c) glucose and fructose
(d) but glucose

Question. The two functional groups present in a typical carbohydrate are:
(a) – CHO and – COOH
(b) > C = O and – OH
(c) – OH and – CHO
(d) – OH and – COOH

Question. Which of the following pairs represents anomers?

Question. The reaction of glucose with red P + How-do-you-do is called
(a) Sandmeyer'south reaction
(b) Reformatsky reaction
(c) Gattermann's reaction
(d) Reduction

Question. Which of the following reactions of glucose can be explained but past its cyclic structure?
(a) Glucose forms pentaacetate
(b) Glucose reacts with hydroxylamine to class an oxime
(c) Pentaacetate of glucose does not react with hydroxylamine
(d) Glucose is oxidised by nitric acid to gluconic acid

Question. Amylopectin is insoluble in water and constitutes about
(a) xv–20% of starch
(b) twenty–40% of starch
(c) 50–seventy% of starch
(d) lxxx–85% of starch

Question. Cellulose is not digestible by human beings due to absenteeism of cellulose hydrolysing enzyme called
(a) cellulase
(b) invertase
(c) zymase
(d) urease

Question. Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1—C6 glycosidic linkage. Structure of glycogen is like to __________.
(a) Amylose
(b) Amylopectin
(c) Cellulose
(d) Glucose

Question. Which of the following polymer is stored in the liver of animals?
(a) Amylose
(b) Cellulose
(c) Amylopectin
(d) Glycogen

Question. Which of the following naturally occurring a– aminoacids is optically inactive?
(a) Glycine
(b) Alanine
(c) Leucine
(d) Valine

Question. Each polypeptide in a protein has aminoacids linked with each other in a specific sequence. This sequence of amino acids is said to be __________.
(a) primary structure of proteins.
(b) secondary structure of proteins.
(c) tertiary construction of proteins.
(d) quaternary structure of proteins.

Question. Maltose and glucose are
(a) oxidising carbohydrate
(b) reducing sugar
(c) kickoff is oxidising and 2nd is reducing saccharide
(d) both are non-reducing sugar

Question. Proteins are found to have two unlike types of secondary structures viz. α-helix and β-pleated sail structure. α-helix construction of protein is stabilised by :
(a) Peptide bonds
(b) van der Waals forces
(c) Hydrogen bonds
(d) Dipole-dipole interactions

Question. Nucleic acids are the polymers of __________.
(a) nucleosides
(b) nucleotides
(c) bases
(d) sugars

Question. Glucose gives silver mirror test with Tollen's reagent. It shows the presence of
(a) acidic grouping
(b) alcoholic group
(c) ketonic group
(d) aldehyde group

Question. The symbols D and Fifty represents
(a) the optical action of compounds.
(b) the relative configuration of a particular stereoisomer.
(c) the dextrorotatory nature of molecule.
(d) the levorotatory nature of molecule

Question. Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
(a) 5′ and 3′
(b) 1′ and 5′
(c) 5′ and 5′
(d) 3′ and iii′

Question. Proteins can be classified into 2 types on the basis of their molecular shape i.e., fibrous proteins and globular proteins. Examples of globular proteins are :
(a) Insulin
(b) Keratin
(c) Albumin
(d) Myosin

Question. Which ane of the post-obit compounds is different from the residual?
(a) Sucrose
(b) Maltose
(c) Lactose
(d) Glucose

Question. Which of the following reagent cannot distinguish between glucose and fructose?
(a) Fehling's solution
(b) Tollen's reagent
(c) Benedict'due south solution
(d) All of these

Question. Which one of the post-obit does not exhibit the phenomenon of mutarotation ?
(a) (+) – Sucrose
(b) (+) – Lactose
(c) (+) – Maltose
(d) (–) – Fructose

Question. Glucose tin can't be classified as
(a) hexose
(b) carbohydrate
(c) aldose
(d) oligosaccharide

Question. The function of glucose is to
(a) provides free energy
(b) promote growth
(c) prevent diseases
(d) perform all above

Question. Which of the following is the sweetest sugar?
(a) Sucrose
(b) Glucose
(c) Fructose
(d) Maltose

Question. Select the uses of carbohydrates.
(a) Honey is used equally instant source of energy by vaids in ayurvedic arrangement of medicine
(b) These are used as storage molecules
(c) They are used in furniture, cotton fibre, lacquers
(d) All of the above

Question. Deoxyribonucleic acid multiplication is called as
(a) translation
(b) transduction
(c) transcription
(d) replication

Question. Chromosomes are fabricated from
(a) proteins
(b) nucleic acids
(c) proteins and nucleic acids
(d) carbohydrates and nucleic acids

Question. Cellulose is a polymer of
(a) Glucose
(b) Fructose
(c) Ribose
(d) Sucrose

Question. Which of the following is likewise known as fauna starch?
(a) Glycine
(b) Glycogen
(c) Amylose
(d) Cellulose

Question. Which of the post-obit B group vitamins can be stored in our body?
(a) Vitamin B_ane
(b) Vitamin B_ii
(c) Vitamin B₆
(d) Vitamin B₁₂

Question. Which of the following acids is a vitamin?
(a) Aspartic acrid
(b) Ascorbic acid
(c) Adipic acid
(d) Saccharic acid

Question. The double helical construction of DNA was proposed by
(a) Watson and Crick
(b) Meichers
(c) Emil Fischer
(d) Khorana

Question. Which one is the complementary base of cytosine in one strand to that in other strand of Deoxyribonucleic acid?
(a) Adenine
(b) Guanine
(c) Thymine
(d) Uracil

Question. Biomolecules are
(a) aldehydes and ketones
(b) acids and esters
(c) carbohydrates, proteins and fats
(d) alcohols and phenols

Question. Sucrose on hydrolysis gives
(a) fructose+ribose
(b) glucose + fructose
(c) glucose+glucose
(d) fructose + fructose

Question. Invert sugar is
(a) chemically inactive form of saccharide
(b) equimolecular mixture of glucose and fructose
(c) mixture of glucose and sucrose
(d) a variety of cane sugar

Nosotros hope the above multiple option questions for Class 12 Chemistry for Affiliate 14 Biomolecules provided above with answers based on the latest syllabus and exam guidelines issued by CBSE, NCERT and KVS are really useful for you. Biomolecules is an important chapter in Class 12 as it provides very potent agreement well-nigh this topic. Students should get through the answers provided for the MCQs subsequently they take themselves solved the questions. All MCQs have been provided with four options for the students to solve. These questions are really useful for benefit of class 12 students. Please become through these and let us know if you accept whatsoever feedback in the comments section.

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