MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not an aspect of translational-level control? |
| A. | mRNA degradation |
| B. | mRNA localization |
| C. | mRNA translation |
| D. | mRNA stability |
| Answer» B. mRNA localization | |
| 2. |
Which among the following have the largest number of tRNA genes? |
| A. | humans |
| B. | bacteria |
| C. | yeast |
| D. | fruit flies |
| Answer» B. bacteria | |
| 3. |
The RNA polymerase engaged in transcription is ____________ |
| A. | acidic |
| B. | alkaline |
| C. | phosphorylated |
| D. | non-phosphorylated |
| Answer» D. non-phosphorylated | |
| 4. |
Which cells are pluripotent? |
| A. | nucleosomes |
| B. | embryonic stem cells |
| C. | neurons |
| D. | hepatocytes |
| Answer» C. neurons | |
| 5. |
In cellular reprogramming, which of the following is removed during chromatin reorganization? |
| A. | epigenetic marks |
| B. | histones |
| C. | lysosomes |
| D. | nucleosomes |
| Answer» B. histones | |
| 6. |
Expression of genes is also regulated by distant DNA elements called _________________ |
| A. | enhancers |
| B. | activators |
| C. | promoters |
| D. | inhibitors |
| Answer» B. activators | |
| 7. |
Glucocorticoids are released during periods of __________________ |
| A. | stress |
| B. | maturation |
| C. | climate change |
| D. | gastrulation |
| Answer» B. maturation | |
| 8. |
Which of the following is not a proximal promoter element? |
| A. | TATA |
| B. | GC |
| C. | AT |
| D. | CAAT |
| Answer» D. CAAT | |
| 9. |
Which type of enzymes is used in DNA footprinting? |
| A. | RNA-digesting enzymes |
| B. | RNA polymerases |
| C. | DNA polymerases |
| D. | DNA-digesting enzymes |
| Answer» E. | |
| 10. |
TATA box regulates the frequency with which the gene is transcribed. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 11. |
Which of the following is a transcription factor widely employed in eukaryotic gene expression? |
| A. | NE1 |
| B. | NF1 |
| C. | NF2 |
| D. | NF3 |
| Answer» C. NF2 | |
| 12. |
Motifs are related structures present on the transcription factors constituting the _________________ domain. |
| A. | Activation |
| B. | DNA-binding |
| C. | RNA-binding domain |
| D. | Nucleic acid-binding |
| Answer» C. RNA-binding domain | |
| 13. |
Which of the following is a temporary storage site for RNAs? |
| A. | P-bodies |
| B. | Ribosomes |
| C. | V-bodies |
| D. | Vacuole |
| Answer» B. Ribosomes | |
| 14. |
Which of the two strands of DNA will be transcribed is determined by the _______________ |
| A. | RNA polymerase |
| B. | DNA polymerase |
| C. | Promoter sequence |
| D. | Inducer sequence |
| Answer» D. Inducer sequence | |
| 15. |
In the below figure of a transfer RNA, which is the site of attachment for an amino acid? |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» B. b | |
| 16. |
Programmed cell death is also known as |
| A. | regulation |
| B. | apoptosis |
| C. | cascade |
| D. | suicide |
| Answer» C. cascade | |
| 17. |
Dicer converts double-stranded RNAs into _______________ |
| A. | snRNA |
| B. | siRNA |
| C. | mRNA |
| D. | tRNA |
| Answer» C. mRNA | |
| 18. |
Myoblasts are precursor of which of following cells? |
| A. | muscles |
| B. | neurons |
| C. | blood |
| D. | bones |
| Answer» B. neurons | |
| 19. |
Which enzyme is used to kill the cells in genome-wide location analysis? |
| A. | luciferase |
| B. | endonuclease |
| C. | exonuclease |
| D. | formaldehyde |
| Answer» E. | |
| 20. |
Movement of gene from one locus to another is called |
| A. | oncogenes |
| B. | Virogenes |
| C. | homeotic genes |
| D. | transposons |
| Answer» E. | |
| 21. |
Partial trisomy is the presence of _____ copies of a gene. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 22. |
Most alterations in the genes occur during ____________________ |
| A. | cell division |
| B. | motility |
| C. | anaerobic conditions |
| D. | sunlight exposure |
| Answer» B. motility | |
| 23. |
How is new membrane protein transported to its destination from endoplasmic reticulum? |
| A. | transport vesicle |
| B. | lysosome |
| C. | ribosomes |
| D. | moves freely |
| Answer» B. lysosome | |
| 24. |
In the leucine-zipper motif, leucine occurs after every ____ amino acids. |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 25. |
How many types of cells were fused in the cloning of Dolly? |
| A. | 2 |
| B. | 5 |
| C. | 7 |
| D. | 8 |
| Answer» B. 5 | |
| 26. |
Drosha is an ___________________ |
| A. | enzyme |
| B. | micro RNA |
| C. | messenger RNA |
| D. | satellite DNA |
| Answer» B. micro RNA | |
| 27. |
In bacteria, mRNAs bound to small metabolites are called ______________ |
| A. | euchromatin |
| B. | riboswitches |
| C. | heterochromatin |
| D. | nucleosome |
| Answer» C. heterochromatin | |
| 28. |
Which of the following is a pre-rRNA? |
| A. | 5S |
| B. | 5.8S |
| C. | 45S |
| D. | 18S |
| Answer» D. 18S | |
| 29. |
Which of following is not a part of an operon? |
| A. | operator |
| B. | genes |
| C. | promoter |
| D. | mRNA |
| Answer» E. | |
| 30. |
What takes place when siRNAs are used in place of dsRNA in mammalian cells? |
| A. | gene knock-down |
| B. | apoptosis |
| C. | necrosis |
| D. | aggregation |
| Answer» B. apoptosis | |
| 31. |
What is approximate length of piRNAs? |
| A. | 30 nucleotides |
| B. | 300 nucleotides |
| C. | 10 nucleotides |
| D. | 50 nucleotides |
| Answer» B. 300 nucleotides | |
| 32. |
Transfer RNAs (tRNA) are transcribed by _________________ |
| A. | pre-RNA |
| B. | rDNA |
| C. | tDNA |
| D. | siRNA |
| Answer» D. siRNA | |
| 33. |
TFIID is a ___________ |
| A. | protein complex |
| B. | rRNA |
| C. | endonuclease |
| D. | ribonuclease |
| Answer» B. rRNA | |
| 34. |
Ras is an example of which of following? |
| A. | cancer repressor genes |
| B. | proto oncogenes |
| C. | oncogenes |
| D. | tumor suppressor genes |
| Answer» C. oncogenes | |
| 35. |
Unlike the 23 pairs of chromosomes in human cells, chimpanzees have 24 pairs of chromosomes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 36. |
Which of following is an example of a repressive operon? |
| A. | lac |
| B. | l arabinose |
| C. | mac |
| D. | trp |
| Answer» E. | |
| 37. |
The phenomenon of RNA interference was discovered using the organism ___________________ |
| A. | Mus musculus |
| B. | Drosophila |
| C. | C. elegans |
| D. | Arabidopsis thaliana |
| Answer» D. Arabidopsis thaliana | |
| 38. |
The structural genes in an operon lie adjacent to one another. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
Cancer-causing genes are called |
| A. | oncogenes |
| B. | Virogenes |
| C. | homeotic genes |
| D. | metamorphosis |
| Answer» B. Virogenes | |
| 40. |
The processing of pre-rRNA is done using __________ |
| A. | nucleolus |
| B. | mRNA |
| C. | snoRNA |
| D. | siRNA |
| Answer» D. siRNA | |
| 41. |
All mRNA precursors are synthesized by ___________________ |
| A. | RNA polymerase I |
| B. | RNA polymerase II |
| C. | RNA polymerase III |
| D. | RNA polymerase IV |
| Answer» C. RNA polymerase III | |
| 42. |
Which of the following enzymes are used in the process of transcription? |
| A. | DNA polymerases |
| B. | RNA polymerases |
| C. | DNA helicase |
| D. | DNA topoisomerase |
| Answer» C. DNA helicase | |
| 43. |
Which of following does not affect phenotype? |
| A. | point mutation |
| B. | substitution |
| C. | addition |
| D. | silent mutation |
| Answer» E. | |
| 44. |
RNA interference is not observed in vertebrates. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 45. |
Newly synthesized mRNA is transported to which of following sites? |
| A. | ribosomes |
| B. | endoplasmic reticulum |
| C. | cell membrane |
| D. | cytoplasm |
| Answer» E. | |
| 46. |
The sheep Dolly was cloned in the year ___________ |
| A. | 1997 |
| B. | 1999 |
| C. | 2000 |
| D. | 2002 |
| Answer» B. 1999 | |
| 47. |
Single cells from an adult animal can give rise to whole new individuals. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 48. |
Which of following proteins is made from LacZ gene? |
| A. | b-galactosidase |
| B. | lactase |
| C. | galactosidase |
| D. | tryptophan |
| Answer» B. lactase | |
| 49. |
Who elaborated on the significance of codons? |
| A. | George Gamow |
| B. | Thomas Morgan |
| C. | H. J. Muller |
| D. | James Watson |
| Answer» B. Thomas Morgan | |
| 50. |
Which is not a type of chromosomal aberration? |
| A. | mutations |
| B. | inversion |
| C. | translocation |
| D. | duplication |
| Answer» B. inversion | |