MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Amino acids prior to their incorporation into polypeptide must be attached to a special adaptor molecule. Who proved this and when? |
| A. | Francis H. Crick in 1955 |
| B. | Paul C. Zamecnic and Maholon B. Hoagland in 1957 |
| C. | James Watson and Francis H. Crick in 1953 |
| D. | Linus Pauling in 1950 |
| Answer» C. James Watson and Francis H. Crick in 1953 | |
| 2. |
Multiple copies of RNA could be formed at the same time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Watson and Crick’s suggestion of the complementary strand synthesis taking one of the parent strand as template was proposed in _________ |
| A. | 1869 |
| B. | 1909 |
| C. | 1953 |
| D. | 1952 |
| Answer» D. 1952 | |
| 4. |
MULTIPLE_COPIES_OF_RNA_COULD_BE_FORMED_AT_THE_SAME_TIME.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Amino_acids_prior_to_their_incorporation_into_polypeptide_must_be_attached_to_a_special_adaptor_molecule._Who_proved_this_and_when?$ |
| A. | Francis H. Crick in 1955 |
| B. | Paul C. Zamecnic and Maholon B. Hoagland in 1957 |
| C. | James Watson and Francis H. Crick in 1953 |
| D. | Linus Pauling in 1950 |
| Answer» C. James Watson and Francis H. Crick in 1953 | |
| 6. |
Which of the following does not take part in gene expression? |
| A. | Replication |
| B. | Transcription |
| C. | RNA processing |
| D. | Translation |
| Answer» B. Transcription | |
| 7. |
Which of the following regarding the basic mechanism of gene expression is correct? |
| A. | DNA ―> tRNA―> protein |
| B. | RNA ―> cDNA ―> mRNA―> protein |
| C. | RNA ―> DNA―> mRNA ―> protein |
| D. | DNA ―> protein |
| Answer» C. RNA ‚Äö√Ñ√∂‚àö√ë‚àö√ò> DNA‚Äö√Ñ√∂‚àö√ë‚àö√ò> mRNA ‚Äö√Ñ√∂‚àö√ë‚àö√ò> protein | |
| 8. |
Replication of DNA ends are carried out by polymerase. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Who, in which year showed firm enzymological proof that DNA alone functions as the template for the synthesis of new DNA strands? |
| A. | Watson and Crick in 1953 |
| B. | Avery, MacCarty and Macleod in 1944 |
| C. | Meselson and Stahl in 1958 |
| D. | Hershey and Chase in 1952 |
| Answer» D. Hershey and Chase in 1952 | |
| 10. |
Which of the following statements is true with respect to the DNA double helix? |
| A. | Composed of two or more polynucleotide chains |
| B. | The base pairs have opposite polarity |
| C. | Covalent bond exists in base pairing |
| D. | T is transcribed as U |
| Answer» C. Covalent bond exists in base pairing | |
| 11. |
Watson and Crick’s suggestion of the complementary strand synthesis taking one of the parent strand as template was proposed in _________$ |
| A. | 1869 |
| B. | 1909 |
| C. | 1953 |
| D. | 1952 |
| Answer» D. 1952 | |
| 12. |
Semiconservative nature of replication of eukaryotic chromosome was first demonstrated by _______ |
| A. | Walter Flemming on root tip cells of Vicia faba |
| B. | J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Vicia faba |
| C. | Walter Flemming on root tip cells of Phaseolus vulgaris |
| D. | J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Phaseolus vulgaris |
| Answer» C. Walter Flemming on root tip cells of Phaseolus vulgaris | |
| 13. |
Who were the first to suggest that one strand of DNA might act as a template for the synthesis of its complementary strand? |
| A. | Meselson and Stahl |
| B. | Watson and crick |
| C. | Walter Flemming |
| D. | Rosalind Franklin and Maurice Wilkins |
| Answer» C. Walter Flemming | |