MCQOPTIONS
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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. |
PIWI proteins have been best studied in _________________ |
| A. | mice |
| B. | fruit flies |
| C. | nematodes |
| D. | maize |
| Answer» C. nematodes | |
| 2. |
Which of the following gene encodes for the white of a chicken egg? |
| A. | ovalbumin |
| B. | globulin |
| C. | troponin |
| D. | dystrophin |
| Answer» B. globulin | |
| 3. |
A number of ubiquitin molecules must be attached to ensure enzymatic degradation of a polypeptide. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 4. |
How many β-subunits are there in proteasomes? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 5. |
More than one RNA polymerase can attach to the promoter site. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 6. |
Which of the following products of RNA editing plays an important role in the absorption of fats? |
| A. | apolipoprotein B-48 |
| B. | apolipoprotein B-44 |
| C. | apolipoprotein B-30 |
| D. | apolipoprotein B- 34 |
| Answer» B. apolipoprotein B-44 | |
| 7. |
Ras is which of following types of protein? |
| A. | G protein |
| B. | membrane protein |
| C. | enzymes |
| D. | transport protein |
| Answer» B. membrane protein | |
| 8. |
Which of following operons is commonly present in E Coli? |
| A. | trp |
| B. | ala |
| C. | phe |
| D. | pro |
| Answer» B. ala | |
| 9. |
What percentage of human genome is transcribed at least once at some point in our lives? |
| A. | 100 |
| B. | 75 |
| C. | 47 |
| D. | 50 |
| Answer» C. 47 | |
| 10. |
Which of following is not needed during RNA synthesis? |
| A. | RNA polymerase |
| B. | template strand |
| C. | ribosomes |
| D. | primer |
| Answer» E. | |
| 11. |
Microarrays used in the ChIP experiments contain non-coding DNA. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 12. |
5S rRNA is present only in eukaryotes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 13. |
Which enzyme is responsible for the synthesis of microRNAs? |
| A. | enhancer |
| B. | dicer |
| C. | splicer |
| D. | promoter |
| Answer» C. splicer | |
| 14. |
Where is tRNA molecule made? |
| A. | nucleus |
| B. | ribosomes |
| C. | endosomes |
| D. | endoplasmic reticulum |
| Answer» B. ribosomes | |
| 15. |
The synthesis of polypeptide can be divided into ______ distinct activities. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 16. |
Genes whose products inhibit cell division are called |
| A. | proto oncogenes |
| B. | oncogenes |
| C. | tumor suppressor genes |
| D. | cancer repressor genes |
| Answer» D. cancer repressor genes | |
| 17. |
Which of the following acts as an inducer in the lac operon? |
| A. | glucose |
| B. | tryptophan |
| C. | lactose |
| D. | galactose |
| Answer» D. galactose | |
| 18. |
Lactose can be a nutrient source for bacteria, it is a _____________________ |
| A. | monosaccharide |
| B. | lipid |
| C. | disaccharide |
| D. | polysaccharide |
| Answer» D. polysaccharide | |
| 19. |
Micro RNAs participate in ______________ |
| A. | posttranslational modification |
| B. | posttranscriptional modification |
| C. | chromatin remodeling |
| D. | gene silencing |
| Answer» E. | |
| 20. |
Which of following can cause mutations? |
| A. | heat |
| B. | mutagens |
| C. | water |
| D. | malnourishment |
| Answer» C. water | |
| 21. |
Which of following is not considered a mutagen? |
| A. | X ray |
| B. | Ultraviolet rays |
| C. | oncoviruses |
| D. | cyanide |
| Answer» E. | |
| 22. |
Which of the following prevents the digestion of mRNA by exonucleases? |
| A. | methyl-guanosine cap |
| B. | methylene blue |
| C. | poly(A) tail |
| D. | bromophenol blue |
| Answer» B. methylene blue | |
| 23. |
UGA is a universal stop codon. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 24. |
In which region of human body E Coli as a microbiota is found? |
| A. | human colon |
| B. | blood |
| C. | mouth |
| D. | bones |
| Answer» B. blood | |
| 25. |
Which of the following is an initiation codon? |
| A. | AAA |
| B. | AUG |
| C. | AGU |
| D. | AGG |
| Answer» C. AGU | |
| 26. |
The transcription factors assist the RNA polymerase in locating ________________ |
| A. | stop codon |
| B. | mutation |
| C. | active site |
| D. | promoter |
| Answer» E. | |
| 27. |
Which of the following play a role in structural support? |
| A. | rRNA |
| B. | mRNA |
| C. | tDNA |
| D. | tRNA |
| Answer» B. mRNA | |
| 28. |
In making of which of following does liver cell specialize? |
| A. | neurons |
| B. | bile |
| C. | albumin |
| D. | Crystallin |
| Answer» D. Crystallin | |
| 29. |
Process by which cells become specialized in structure and function is called |
| A. | metamorphosis |
| B. | differentiation |
| C. | translation |
| D. | recombination |
| Answer» C. translation | |
| 30. |
What happens at 3 prime ends of mRNA? |
| A. | deletion of end |
| B. | addition of cap |
| C. | addition of poly t tail |
| D. | addition of poly a tail |
| Answer» E. | |
| 31. |
A similar group of cells organized in a pattern is called |
| A. | tissues |
| B. | organs |
| C. | systems |
| D. | lymph |
| Answer» B. organs | |
| 32. |
Which of following proteins are required to bring translation initiator complex together? |
| A. | initiator proteins |
| B. | translation proteins |
| C. | spliceosomes |
| D. | ribozymes |
| Answer» B. translation proteins | |
| 33. |
How much Protein-coding DNA accounts in total human genome? |
| A. | 0.015 |
| B. | 0.03 |
| C. | 0.19 |
| D. | 0.9 |
| Answer» B. 0.03 | |
| 34. |
Which of following is not an example of ncRNA? |
| A. | piRNA |
| B. | miRNA |
| C. | tRNA |
| D. | siRNA |
| Answer» D. siRNA | |
| 35. |
The processing-level control is concerned with ____________ |
| A. | primary transcripts |
| B. | secondary transcripts |
| C. | tertiary transcripts |
| D. | quaternary transcripts |
| Answer» B. secondary transcripts | |
| 36. |
Eukaryotic mRNAs have special modifications, not present in prokaryotic mRNAs. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 37. |
Which family of proteins plays a key role in gene silencing pathways? |
| A. | Globulin |
| B. | Argonaute |
| C. | Intein-containing proteins |
| D. | Amino-acyl transferases |
| Answer» C. Intein-containing proteins | |
| 38. |
How many codons do not code for amino acids? |
| A. | 3 |
| B. | 5 |
| C. | 9 |
| D. | 11 |
| Answer» B. 5 | |
| 39. |
Promoter is a ____________________ |
| A. | gene |
| B. | site on DNA |
| C. | site on RNA |
| D. | toxin |
| Answer» C. site on RNA | |
| 40. |
After how long bacterial mRNA degrades? |
| A. | few minutes |
| B. | few hours |
| C. | several hours |
| D. | weeks |
| Answer» B. few hours | |
| 41. |
The human genome consists of _____ rDNA. |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» B. 4 | |
| 42. |
How many proteins can a single gene encode for? |
| A. | 5 |
| B. | 6 |
| C. | 1 |
| D. | unlimited |
| Answer» D. unlimited | |
| 43. |
How many types of RNA polymerase is present in eukaryotes? |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 7 |
| Answer» B. 4 | |
| 44. |
Which of following is an example of inducive operon? |
| A. | trp |
| B. | mac |
| C. | l arabinose |
| D. | lac |
| Answer» E. | |
| 45. |
First artificially synthesized gene sequence was _________________ |
| A. | poly(U) |
| B. | poly(A) |
| C. | poly(G) |
| D. | poly(C) |
| Answer» B. poly(A) | |
| 46. |
A region within a single promoter that works for multiple genes is called |
| A. | regulator |
| B. | operator |
| C. | initiator |
| D. | Polypromoter |
| Answer» C. initiator | |
| 47. |
How many types of transcription factors assist in transcription-level control? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 48. |
Zygotes containing chromosomal deletion are produced by ___________ |
| A. | apoptosis |
| B. | abnormal mitosis |
| C. | abnormal meiosis |
| D. | necrosis |
| Answer» D. necrosis | |
| 49. |
Which of following is not involved directly in translation process? |
| A. | mRNA |
| B. | tRNA |
| C. | ribosomes |
| D. | DNA |
| Answer» E. | |
| 50. |
Genes with intervening (non-coding) sequences are called ___________________ |
| A. | axons |
| B. | exons |
| C. | split genes |
| D. | jumping genes |
| Answer» D. jumping genes | |