Biomolecules PYQs Set 7 (PDF)

Set 7 of 12 · Questions 181-210 of 335

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Mere Teacher · Previous Year Questions

JEE Main Chemistry · Biomolecules · Set 7 (Q181-210)

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181.
which of the following is a basic amino acid? [NEET 2020]
1. (1) $Alanine$
2. (2) $Tyrosine$
3. (3) $Lysine$
4. (4) $Serine$
182.
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) $ii, iii$
183.
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) $A is false but R is true.$
184.
Which of the following structures represents the peptide chain?
1. (1)
2. (2)
3. (3)
4. (4)
185.
Which of the following compounds can form a Zwitter ion? [NEET 2018]
1. (1) $Benzoic acid$
2. (2) $Acetanilide$
3. (3) $Aniline$
4. (4) $Glycine$
186.
$Match List I with List II (Natural amino acid) / (One Letter Code)$
$List I$ $List II$
$(A) Glutamic acid$ $(I) Q$
$(B) Glutamine$ $(II) W$
$(C) Tyrosine$ $(III) E$
$(D) Tryptophan$ $(IV) Y$
$Choose the correct answer from the options given below:$
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) $(A)-II, B-I, (C)-IV, (D)-III$
187.
In which of the following, Keratin, a fibrous protein is absent?
1. (1) $Hair$
2. (2) $Muscles$
3. (3) $Silk$
4. (4) $Wool$
188.
An example of biopolymer is
1. (1) $Teflon$
2. (2) $neoprene$
3. (3) $nylon‐6, 6$
4. (4) $DNA$
189.
Vitamin- $B_{1}$ is
1. (1) $riboflavin$
2. (2) $cobalamine$
3. (3) $thiamine$
4. (4) $pyridoxine$
190.
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) $α- D-glucose, C_{1} - C_{4} and C_{2} - C_{6} linkages$
191.
Cellulose is polymer of
1. (1) $glucose$
2. (2) $fructose$
3. (3) $ribose$
4. (4) $sucrose$
192.
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) $In cyclic structure of fructose, there are four carbons and one oxygen atom.$
193.
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) $none of these.$
194.
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) $All of these$
195.
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) $(A) (C) and (D) Only$
196.
Thiamine is
1. (1) $Nitrogenous base$
2. (2) $Amino acid$
3. (3) $Hormone$
4. (4) $Vitamin$
197.
Hydrolysis of sucrose gives :
1. (1) $α -D-(-)-Glucose and β - D -_{(} -_{)} -Fructose$
2. (2) $α -D-(+)-Glucose and α - D -_{(} -_{)} -Fructose$
3. (3) $α -D-(-)-Glucose and α -D-(+)-Fructose$
4. (4) $α -D-(+)-Glucose and β - D -_{(} -_{)} -Fructose$
198.
Sucrose on hydrolysis gives [NEET 2020]
1. (1) $β-D-glucose + α-D-fructose$
2. (2) $α-D-glucose +β-D-glucose$
3. (3) $α-D-glucose +β-D-fructose$
4. (4) $α-D-fructose +β-D-fructose$
199.
Glycolysis is
1. (1) $oxidation of glucose to glutamate$
2. (2) $conversion of p)^{γ} ruvate to citrate$
3. (3) $oxidation of glucose to pyruvate$
4. (4) $conversion of glucose to haem.$
200.
The human body does not produce
1. (1) $enzymes$
2. (2) $DNA$
3. (3) $vitamins$
4. (4) $hormones$
201.
Enzymes are made up of
1. (1) $edible proteins$
2. (2) $proteins with specific structure$
3. (3) $nitrogen containing carbohydrates$
4. (4) $carbohydrates.$
202.
Haemoglobin is
1. (1) $a vitamin$
2. (2) $a carbohydrate$
3. (3) $an enzyme$
4. (4) $a globular protein.$
203.
What is the basic formula for starch?
1. (1) $(C_{6} H_{12} O_{6})_{n}$
2. (2) $(C_{6} H_{10} O_{5})_{n}$
3. (3) $C_{12} H_{22} O_{11}$
4. (4) $(C_{6} H_{12} O_{4})_{4}$
204.
Given below are two statements:
Statement I: Sucrose is dextrorotatory. However, sucrose upon hydrolysis gives a solution having mixture of products. This solution shows laevorotation.
Statement II: Hydrolysis of sucrose gives glucose and fructose. Since the laevorotation of glucose is more than the dextrorotation of fructose, the resulting solution becomes laevorotatory.
In the light of the above statements, choose the correct answer from the options given below
1. (1) $Statement I is true but Statement II is false$
2. (2) $Statement I is false but Statement II is true$
3. (3) $Both Statement I and Statement II are false$
4. (4) $Both Statement I and Statement II are true$
205.
In DNA, the complimentary bases are
1. (1) $adenine and guanine; thymine and cytosine$
2. (2) $uracil and adenine; cytosine and guanine$
3. (3) $adenine and thymine; guanine and cytosine$
4. (4) $adenine and thymine; guanine and uracil$
206.
The pyrimidine bases present in DNA are
1. (1) $cytosine and guanine$
2. (2) $cytosine and thymine$
3. (3) $cytosine and uracil$
4. (4) $cytosine and adenine$
207.
Which of the following is a condensation polymer ?
1. (1) $Buna -S$
2. (2) $Neoprene$
3. (3) $Teflon$
4. (4) $Nylon 6, 6$
208.
Which of the following vitamins cannot be stored in the body?
1. (1) $A$
2. (2) $C$
3. (3) $E$
4. (4) $K$
209.
Which of the following is NOT an example of fibrous protein ?
1. (1) $Keratin$
2. (2) $Albumin$
3. (3) $Collagen$
4. (4) $Myosin$
210.
$The number of carbonyl groups present in a tripeptide Asp - Glu - Lys is$