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Q. No.Which of the following statement is/are incorrect regarding polysaccharides?
A.
Inulin is a polymer of fructose
B.
Both starch and glycogen are present as storehouses of energy in plant tissue
C.
Glucose is a monomer of cellulose
D.
Cellulose is a homopolymer while chitin is a heteropolymer
E.
Starch does not contain complex helices and hence cannot hold I2
Choose the correct answer from the options given below:
1. A, B, C only
2. B, D, E only
3. B, E only
4. B, C, D only
Subtopic: Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
55%
From NCERT
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Reverse transcriptase is mainly found in retroviruses such as HIV. Four nucleotides are needed for the reaction catalysed by this enzyme.
A group of molecules may inhibit this enzyme. These molecules are structurally similar to the nucleotides but slightly altered so that bonds normally formed in the reaction cannot be made.
Which of the following statements may be correct?
1. The four inhibitor molecules will resemble adenine, thymine, guanine and cytosine.
2. The inhibitor molecules can prevent the formation of phosphodiester bonds.
3. The inhibitor molecules can result in a reduction in the number of new virus particles produced.
1. 1 and 3 only
2. 1, 2 and 3
3. 3 only
4. 1 and 2 only
A group of molecules may inhibit this enzyme. These molecules are structurally similar to the nucleotides but slightly altered so that bonds normally formed in the reaction cannot be made.
Which of the following statements may be correct?
1. The four inhibitor molecules will resemble adenine, thymine, guanine and cytosine.
2. The inhibitor molecules can prevent the formation of phosphodiester bonds.
3. The inhibitor molecules can result in a reduction in the number of new virus particles produced.
1. 1 and 3 only
2. 1, 2 and 3
3. 3 only
4. 1 and 2 only
Subtopic: Enzyme Inhibition |
60%
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Which of the following statements is/are correct for all enzyme inhibitors?
(i) They alter the shape of the active site.
(ii) They denature the enzyme.
(iii) They increase the activation energy of the reaction.
(iv) They reduce the rate of the enzyme catalysed reaction.
1. (iv) only
2. (iii) only
3. (i), (ii) and (iii) only
4. (i), (ii) and (iv) only
(i) They alter the shape of the active site.
(ii) They denature the enzyme.
(iii) They increase the activation energy of the reaction.
(iv) They reduce the rate of the enzyme catalysed reaction.
1. (iv) only
2. (iii) only
3. (i), (ii) and (iii) only
4. (i), (ii) and (iv) only
Subtopic: Enzyme Inhibition |
50%
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The following structures are found in plant cells:
(i) cell wall
(ii) cell membrane
(iii) nucleolus
(iv) mitochondrion
Which cell structures might contain molecules containing carbohydrate monomers?
1. 1 only
2. 1 and 4 only
3. 2 and 3 only
4. 1, 2, 3 and 4
(i) cell wall
(ii) cell membrane
(iii) nucleolus
(iv) mitochondrion
Which cell structures might contain molecules containing carbohydrate monomers?
1. 1 only
2. 1 and 4 only
3. 2 and 3 only
4. 1, 2, 3 and 4
Subtopic: Carbohydrates |
58%
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Amino acids have a property of ionizable nature of –NH2 and –COOH groups, hence have different structures at different pH. |
| Statement II: | Amino acids can exist as Zwitterionic form at acidic and basic pH. |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are Incorrect. |
| 3. | Statement I is correct but Statement II is incorrect. |
| 4. | Statement I is incorrect but Statement II is correct. |
Subtopic: Amino Acids |
73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Match List-I with List-II
Choose the correct answer from the option given below
| List-I | List-II | ||
| (a) | Insulin | (i) | Phosphoester bond |
| (b) | Inulin | (ii) | Glycosidic bonds |
| (c) | Adenylic acid | (iii) | Peptide bonds |
| (d) | Arachidonic acid | (iv) | C = C double bonds |
Choose the correct answer from the option given below
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (iii) | (i) |
| 2. | (iii) | (ii) | (i) | (iv) |
| 3. | (iv) | (ii) | (iii) | (i) |
| 4. | (iv) | (i) | (ii) | (iii) |
Subtopic: Carbohydrates |
84%
From NCERT
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Read the given statements A, B and C and select the correct option.
1. Statements (A) and (B) are correct
2. Statements (B) and (C) are correct
3. Statements (A) and (C) are correct
4. Statements (A), (B) and (C) are correct
| (A) | All enzymes are proteinaceous in nature. |
| (B) | Some competitive inhibitors are often used in the control of bacterial pathogens. |
| (C) | Active site of an enzyme is formed by the folding of the backbone of tertiary structure of protein upon itself. |
2. Statements (B) and (C) are correct
3. Statements (A) and (C) are correct
4. Statements (A), (B) and (C) are correct
Subtopic: Proteins | Enzymes | Factors Affecting Enzyme Catalysis Reaction | Properties of Enzymes |
58%
From NCERT
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Match column-I with column-II and select the correct option.
1. a(iii), b(i), c(ii), d(iv)
2. a(iii), b(ii), c(iv), d(i)
3. a(iii), b(ii), c(v), d(i)
4. a(iii), b(v), c(ii), d(iv)
| Column-I | Column-II | ||
| a. | Catalyse the transfer of specific groups other than hydrogen from one substrate to other | (i) | Oxido- reductases |
| b. | Catalyse the breakdown of larger molecules into smaller with addition of water |
(ii) | Lyases |
| c. | Catalyse removal of groups from substrates by mechanism other than hydrolysis leaving double bonds |
(iii) | Transferases |
| d. | Catalyse linking together of 2 compounds | (iv) | Ligases |
| (v) | Hydrolases |
2. a(iii), b(ii), c(iv), d(i)
3. a(iii), b(ii), c(v), d(i)
4. a(iii), b(v), c(ii), d(iv)
Subtopic: Enzymes Classification |
81%
From NCERT
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Match column I with column II and select the correct option.
Column I Column II
a. Phosphate and hydroxyl group of (i) Peptide bond
sugar in a nucleotide
b. Polymer of amino acids (ii) Glycosidic bond
c. Polysaccharides (iii) Hydrogen bond
d. Adenine and thymine (iv) Ester bond
in a DNA
1. a(ii), b(iii), c(iv), d(i)
2. a(ii), b(iv), c(iii), d(i)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(i), c(iii), d(ii)
Column I Column II
a. Phosphate and hydroxyl group of (i) Peptide bond
sugar in a nucleotide
b. Polymer of amino acids (ii) Glycosidic bond
c. Polysaccharides (iii) Hydrogen bond
d. Adenine and thymine (iv) Ester bond
in a DNA
1. a(ii), b(iii), c(iv), d(i)
2. a(ii), b(iv), c(iii), d(i)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(i), c(iii), d(ii)
Subtopic: The DNA | Amino Acids | Zwitter ion & Peptide Bond | Carbohydrates: Glycosidic Bond & Disaccharide |
86%
From NCERT
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Read the statements A and B carefully and select the correct answer.
Statement A: Enzyme-substrate complex produced during a catalysed reaction is highly reactive.
Statement B: This complex dissociates into its product and changed enzyme with an intermediate formation of enzyme-product
complex.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement A is incorrect
Statement A: Enzyme-substrate complex produced during a catalysed reaction is highly reactive.
Statement B: This complex dissociates into its product and changed enzyme with an intermediate formation of enzyme-product
complex.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement A is incorrect
Subtopic: Enzymes | Enzyme Catalysis |
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