Biomolecules PYQs Set 6 (PDF)

Set 6 of 11 · Questions 151-180 of 309

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NEET Chemistry · Biomolecules · Set 6 (Q151-180)

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151.
What is the volume of water consumed during acid hydrolysis of $1.368 kg$ of sucrose?
(Given : Molar masses of sucrose $= 342$ , water $= 18$ , density of water $= 1 g / cm^{3}$ )
1. (1) $0.072 dm^{3}$
2. (2) $0.720 dm^{3}$
3. (3) $0.18 dm^{3}$
4. (4) $0.018 dm^{3}$
152.
Whcih of the following compounds will behave as a reducing sugar in an aqueous KOH solution?
1. (1)
2. (2)
3. (3)
4. (4)
153.
Glucose does not react with which of the following.
1. (1) $NH_{2} OH$
2. (2) $HCN$
3. (3) $Br_{2} / Water$
4. (4) $NaHSO_{3}$
154.
Assertion $(A)$ : Both Glucose and Fructose have the same D-configuration.Reason (R) : Both Glucose and Fructose are dextrorotatory.The correct option among the following is:
1. (1) $(A) is true, (R) is true and (R) is the correct explanation for (A)$
2. (2) $(A) is true, (R) is true but (R) is not the correct explanation for (A)$
3. (3) $(A) is true but (R) is false$
4. (4) $(A) is false but (R) is true$
155.
The correct statement about gluconic acid is
1. (1) $It is prepared by oxidation of glucose with HNO_{3}$
2. (2) $It is obtained by partial oxidation of glucose$
3. (3) $It is dicarboxylic acid$
4. (4) $It forms hemiacetal or acetal$
156.
The homopolymer formed from 4-hydroxy – butanoic acids is :
1. (1) $- [O - C (= O) (C H_{2})_{3} - O]_{n} -$
2. (2) $- [O - C (= O) (C H_{2})_{2} - C (= O)]_{n} -$
3. (3) $- [O - C (= O) - (C H_{2})_{2} - C (= O) - O]_{n} -$
4. (4) $- [C (= O) (C H_{2})_{3} - O]_{n} -$
157.
Glucose and Galactose are having identical configuration in all the positions except position.
1. (1) $C - 3$
2. (2) $C - 4$
3. (3) $C - 2$
4. (4) $C - 5$
158.
Poly – $β$ – hydroxybutyrate –co- $β$ hydroxy valetrate (PHBV) is a copolymer of _______.
1. (1) $3-Hydroxybtyrate acid and 4- Hydroxypentanoic acid$
2. (2) $2-Hydroxybtyrate acid and 3- Hydroxypentanoic acid$
3. (3) $3-Hydroxybtyrate acid and 2- Hydroxypentanoic acid$
4. (4) $3-Hydroxybtyrate acid and 3- Hydroxypentanoic acid$
159.
Which one of the following is the structure of lactose?
1. (1)
2. (2)
3. (3)
4. (4)
160.
$D - (+)$ -glucose reacts with hydroxyl amine and yields an oxime. The structure of the
oxime would be
1. (1)
2. (2)
3. (3)
4. (4)
161.
Which functional group participates in disulphide bond formation in proteins?
1. (1) $Thioester$
2. (2) $Thioether$
3. (3) $Thiol$
4. (4) $Thiolactone$
162.
Which of the following is reducing sugar?
1. (1)
2. (2)
3. (3)
4. (4)
163.
Which of the following statements is not true about sucrose ?
1. (1) $It is a non reducing sugar.$
2. (2) $The glycosidic linkage is present between C_{1} of α -glucose and C_{1} of β -fructose$
3. (3) $It is also named as invert sugar.$
4. (4) $On hydrolysis, it produces glucose and fructose.$
164.
The incorrect statement regarding the given structure is
1. (1) $can be oxidized to a dicarboxylic acid with Br_{2} water$
2. (2) $will coexist in equilibrium with 2 other cyclic structure$
3. (3) $despite the presence of - CHO does not give Schiff's test$
4. (4) $has 4 asymmetric carbon atom$
165.
which of the following is a basic amino acid? [NEET 2020]
1. (1) $Alanine$
2. (2) $Tyrosine$
3. (3) $Lysine$
4. (4) $Serine$
166.
Identify the statement which is not correct from the following.
(i) Carbohydrates are stored as giycogen in animals.
(ii) In glycylalanine, of peptide bond belongs to alanine.
(iii) Base - sugar- phosphate unit is known as nucleoside
(iv) Obesity is due to hypothyroidism.
The correct answer is
1. (1) $i, iv$
2. (2) $ii, iii, iv$
3. (3) $i, iii, iv$
4. (4) $ii, iii$
167.
Assertion (A) : In aqueous solution α-amino acids exists as internal salt called Zwitter ion.
Reason (R): : Proline is a natural amino acid having a secondary amino group.
1. (1) $Both A and R are true and R is the correct explanation of A .$
2. (2) $Both A and R are true but R is not the correct explanation of A .$
3. (3) $A is true but R is false.$
4. (4) $A is false but R is true.$
168.
Which of the following structures represents the peptide chain?
1. (1)
2. (2)
3. (3)
4. (4)
169.
Which of the following compounds can form a Zwitter ion? [NEET 2018]
1. (1) $Benzoic acid$
2. (2) $Acetanilide$
3. (3) $Aniline$
4. (4) $Glycine$
170.
$Match List I with List II (Natural amino acid) / (One Letter Code)$
$List I$ $List II$
$(A) Glutamic acid$ $(I) Q$
$(B) Glutamine$ $(II) W$
$(C) Tyrosine$ $(III) E$
$(D) Tryptophan$ $(IV) Y$
$Choose the correct answer from the options given below:$
1. (1) $(A)-III, B-IV, (C)-I, (D)-II$
2. (2) $(A)-IV, B-III, (C)-I, (D)-II$
3. (3) $(A)-III, B-I, (C)-IV, (D)-II$
4. (4) $(A)-II, B-I, (C)-IV, (D)-III$
171.
In which of the following, Keratin, a fibrous protein is absent?
1. (1) $Hair$
2. (2) $Muscles$
3. (3) $Silk$
4. (4) $Wool$
172.
An example of biopolymer is
1. (1) $Teflon$
2. (2) $neoprene$
3. (3) $nylon‐6, 6$
4. (4) $DNA$
173.
Vitamin- $B_{1}$ is
1. (1) $riboflavin$
2. (2) $cobalamine$
3. (3) $thiamine$
4. (4) $pyridoxine$
174.
Amylopectin is composed is :
1. (1) $α- D-glucose, C_{1} - C_{4} and C_{1} - C_{6} linkages$
2. (2) $β- D-glucose, C_{1} - C_{4} and C_{2} - C_{6} linkages$
3. (3) $β- D-glucose, C_{1} - C_{4} and C_{1} - C_{6} linkages$
4. (4) $α- D-glucose, C_{1} - C_{4} and C_{2} - C_{6} linkages$
175.
Cellulose is polymer of
1. (1) $glucose$
2. (2) $fructose$
3. (3) $ribose$
4. (4) $sucrose$
176.
Which is the correct statement?
1. (1) $Starch is a polymer of α ‐glucose.$
2. (2) $Amylose is a component of cellulose.$
3. (3) $Proteins are composed of only one type of amino acid.$
4. (4) $In cyclic structure of fructose, there are four carbons and one oxygen atom.$
177.
Enzymes take part in a reaction and
1. (1) $decrease the rate of a chemical reaction$
2. (2) $increase the rate of a chemical reaction$
3. (3) $both (a) and (b)$
4. (4) $none of these.$
178.
Which of the following is correct?
1. (1) $Cycloheptane is an aromatic compound.$
2. (2) $Diastase is an enzyme.$
3. (3) $Acetophenone is an ether.$
4. (4) $All of these$
179.
The correct statements are :(A) Activation energy for enzyme catalysed hydrolysis of sucrose is lower than that of acid catalysed hydrolysis.(B) During denaturation, secondary and tertiary structures of a protein are destroyed but primary structure remains intact.(C) Nucleotides are joined together by glycosidic linkage between $C_{1}$ and $C_{4}$ carbons of the pentose sugar.(D) Quaternary structure of proteins represents overall folding of the polypeptide chain.
Choose the correct answer from the options given below:
1. (1) $(A) and (B) Only$
2. (2) $(A) (B) and (D) Only$
3. (3) $(B) and (C) Only$
4. (4) $(A) (C) and (D) Only$
180.
Thiamine is
1. (1) $Nitrogenous base$
2. (2) $Amino acid$
3. (3) $Hormone$
4. (4) $Vitamin$