MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which types of changes participate in the process of natural selection? |
| A. | nonsynonymous |
| B. | phenotypic |
| C. | allotypic |
| D. | synonymous |
| Answer» B. phenotypic | |
| 2. |
A change in nucleotide sequence that does not affect the amino acid sequence is called _____________ change. |
| A. | insignificant |
| B. | significant |
| C. | synonymous |
| D. | nonsynonymous |
| Answer» D. nonsynonymous | |
| 3. |
Which of the following is a stop codon in mitochondrial mRNA? |
| A. | AUG |
| B. | UUU |
| C. | AGG |
| D. | UGA |
| Answer» D. UGA | |
| 4. |
UGA is a universal stop codon. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Which was the first artificially synthesized polypeptide? |
| A. | polyphenylalanine |
| B. | tyrosine |
| C. | valine |
| D. | polyisoleucine |
| Answer» B. tyrosine | |
| 6. |
First artificially synthesized gene sequence was _________________a) poly(U)b) poly( |
| A. | poly(U) |
| B. | poly(A) |
| C. | poly(G) |
| D. | poly(C) |
| Answer» B. poly(A) | |
| 7. |
The degeneracy of code was originally predicted by __________________ |
| A. | Charles Darwin |
| B. | Francis Crick |
| C. | Robert Hooke |
| D. | James Watson |
| Answer» C. Robert Hooke | |
| 8. |
How many codons do not code for amino acids? |
| A. | 3 |
| B. | 5 |
| C. | 9 |
| D. | 11 |
| Answer» B. 5 | |
| 9. |
The genetic code is degenerate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Who elaborated on the significance of codons? |
| A. | George Gamow |
| B. | Thomas Morgan |
| C. | H. J. Muller |
| D. | James Watson |
| Answer» B. Thomas Morgan | |