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 lipids? |
| A. | These are heterogeneous organic compounds comprising of C, H and O |
| B. | These are water insoluble and release more energy as compared to carbohydrates |
| C. | These also act as water barrier and messenger and are constituents of plant |
| D. | Phospholipids are an example of simple fatty acids |
| Answer» E. | |
| 2. |
Which among the following is incorrect about RNA? |
| A. | RNA is always less stable than DNA because of the two OH on 1 and 2 carbons of oxy ribose |
| B. | RNA has uracil whereas DNA has thymine |
| C. | RNA is single stranded whereas DNA is double-stranded |
| D. | RNA on hydrolysis gives ribose sugar |
| Answer» B. RNA has uracil whereas DNA has thymine | |
| 3. |
Which among the following nucleotide is not present in DNA? |
| A. | Adenine |
| B. | Thymine |
| C. | Cytosine |
| D. | Uracil |
| Answer» E. | |
| 4. |
Enzymes that link covalent bond between substrates to form a large molecule are called _______ |
| A. | Isomerases |
| B. | Lyases |
| C. | Ligases |
| D. | Transferases |
| Answer» B. Lyases | |
| 5. |
Transferase catalyzes oxidation and reduction between 2 substrates. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Which among the following does not affect the activity of the enzyme after a particular point? |
| A. | Temperature |
| B. | PH |
| C. | Concentration of substrates |
| D. | Competitive inhibitor |
| Answer» E. | |
| 7. |
Which among the following is incorrect about amino acids? |
| A. | Enzymes are named after compounds/ class on which they act and their names end with -ase |
| B. | Oxidoreductase reduces few substrates whereas oxidizes few other substrates |
| C. | Enzyme kinetics is governed by Michael-Menden equation |
| D. | Enzymes take part in the reaction and increase the rate of reaction |
| Answer» E. | |
| 8. |
Which among the following is incorrect about enzymes? |
| A. | Pepsin helps in breaking of proteins |
| B. | Lipase breaks lipids |
| C. | Amylase breaks vitamins |
| D. | Enzymes have a three dimensional structure and this structure has active sites |
| Answer» D. Enzymes have a three dimensional structure and this structure has active sites | |
| 9. |
Enzymes are biocatalysts i.e. they increase the rate of reaction of metabolic reactions. |
| A. | True |
| B. | False |
| Answer» B. False | |