MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following is incorrect about enzymes? |
| A. | Enzymes are proteins or non-proteins that act as bio-catalysts |
| B. | Holoenzymes comprise of a prosthetic group and an apoenzyme |
| C. | Prosthetic group can be either co-factors or co-enzymes |
| D. | Cutting a potato leads to the breakage of bonds in the enzymes present in it |
| Answer» E. | |
| 2. |
Which among the following is incorrect about denaturation? |
| A. | Proteins have a unique structure which might get disrupted with change in pH and temperature |
| B. | Secondary, tertiary and quaternary structure is lost |
| C. | Proteins still retain their characteristics as they don’t lose their primary structure |
| D. | Proteins are stereospecific to many enzymes |
| Answer» D. Proteins are stereospecific to many enzymes | |
| 3. |
Tertiary structure of protein is formed by __________ |
| A. | Sulphide linkages between different amino acids |
| B. | Multiple chains of polypeptides held together by hydrogen bonds |
| C. | Peptide linkages between two amino acids |
| D. | Hydrogen bond formed by helical or pleated structure |
| Answer» B. Multiple chains of polypeptides held together by hydrogen bonds | |
| 4. |
Which among the following statements is incorrect about classification of protein? |
| A. | Fibrous proteins result when long peptide chains run parallel and are held by hydrogen and sulphide linkages |
| B. | Globular structures result when chain of polypeptide coil around themselves to form a globe like structure |
| C. | Linear structure of amino acids in a polypeptide is called primary structure |
| D. | Collagen is an example of globular protein |
| Answer» E. | |
| 5. |
Proteins are polymers of amino acids that are connected by __________ |
| A. | Peptide linkage |
| B. | Glycosidic linkage |
| C. | Phosphodiester linkage |
| D. | Vanderwaal linkages |
| Answer» B. Glycosidic linkage | |
| 6. |
Non-essential amino acids are those amino acids that our body doesn’t contain and acquires it through food. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Zwitter ion in aqueous solution is __________ |
| A. | Amphoteric |
| B. | Acidic |
| C. | Basic |
| D. | Anomalous |
| Answer» E. | |
| 8. |
Which among the following is incorrect about amino acids? |
| A. | Amino acids are those that contain an amine group and a carboxylic group |
| B. | Base on the position of amino group with respect to the carboxylic group, amino groups are classified as α-, β-, γ-, δ- amino acids |
| C. | Proteins on hydrolysis produce α-, β-, γ-, δ- amino acids |
| D. | Amino acids are usually represented by a three letter symbol or a one letter convention |
| Answer» D. Amino acids are usually represented by a three letter symbol or a one letter convention | |
| 9. |
20 amino acids undergo different permutations and combinations to form a large number of proteins. |
| A. | True |
| B. | False |
| Answer» B. False | |