In the enzyme which catalyses the breakdown of:
\(\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2\)
the prosthetic group is :
1. Nicotinamide adenine dinucleotide
2. Haem
3. Zinc
4. Niacin
Subtopic: Enzyme Cofactors |
67%
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NEET - 2022
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If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G ?
1. T : 20%, G : 30%
2. T : 30%, G : 20%
3. T : 30%, G : 30%
4. T : 20%, G : 20%
1. T : 20%, G : 30%
2. T : 30%, G : 20%
3. T : 30%, G : 30%
4. T : 20%, G : 20%
Subtopic: Nucleic Acid: Nucleotides |
84%
From NCERT
NEET - 2022
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Match each item in Column I with only one item in Column II and select the correct match from the codes given:
Codes:
| Column I [Component] |
Column II [% of the total cellular mass] |
| A. Protein | P. 2 |
| B. Carbohydrates | Q. 1 |
| C. Lipids | R. 5-7 |
| D. Nucleic acids | S. 3 |
| T. 10-15 | |
| U. 70-90 |
Codes:
| A | B | C | D | |
| 1. | U | P | R | Q |
| 2. | T | S | P | R |
| 3. | T | P | S | R |
| 4. | P | Q | R | S |
Subtopic: Introduction |
77%
From NCERT
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Subtopic: Nucleic Acid: Nucleotides |
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Consider the given statements regarding some important secondary metabolites:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | Morphine is a strong opiate that is found naturally in opium and is mainly used as a pain medication. |
| II: | Ricin is a toxin and a highly potent toxin produced in the seeds of the castor oil plant. |
| III: | Concanavalin A is a lectin and is widely used in biology and biochemistry to characterize glycoproteins and other sugar-containing entities on the surface of various cells. |
| IV: | Vinblastin is an anti-cancer drug typically used with other medications, to treat a number of types of cancer. |
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Primary & Secondary Metabolites |
80%
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The given figure represents structure of glycogen/amylopectin. Identify A, B, C and D:
| A | B | C | D | |
| 1. | Reducing end | Non reducing end | α [1→4] linkage | α [1→6] linkage |
| 2. | Non reducing end | Reducing end | α [1→4] linkage | α [1→6] linkage |
| 3. | Reducing end | Non reducing end | α [1→6] linkage | α [1→4] linkage |
| 4. | Non reducing end | Reducing end | α [1→6] linkage | α [1→4] linkage |
Subtopic: Carbohydrates | Carbohydrates: Glycosidic Bond & Disaccharide | Carbohydrates: Starch & Glycogen |
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What level of protein structure is shown in the given diagram?
| 1. Primary | 2. Secondary |
| 3. Tertiary | 4. Quaternary |
Subtopic: Proteins |
67%
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Which of the following categories of enzyme classification are correctly matched?
| EC 1 | Oxidoreductases: catalyze oxidation/reduction reactions |
| EC 2 | Hydrolases: catalyze the hydrolysis of various bonds |
| EC 3 | Transferases: transfer a functional group (e.g. a methyl or phosphate group) |
| EC 4 | Lyases: cleave various bonds by means other than hydrolysis and oxidation |
| EC 5 | Isomerases: catalyze isomerization changes within a single molecule |
| EC 6 | Ligases: join two molecules with covalent bonds. |
1. EC 1, EC 4, EC 5 and EC 6 only
2. EC 2 and EC 3 only
3. EC 1, EC 4 and EC 6 only
4. EC 3, EC 4, EC 5 and EC 6 only
Subtopic: Enzymes Classification |
61%
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Enzymes A, B and C in the given figure can be:
| A | B | C | |
| 1. | Gastric lipase | Salivary amylase | Lingual lipase |
| 2. | Pepsin | Salivary amylase | Trypsin |
| 3. | Pepsin | Trypsin | Lactase |
| 4. | Rennin | Maltase | Sucrase |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
71%
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