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. |
Which of following is site of post-transcriptional modifications? |
| A. | cell membrane |
| B. | endoplasmic reticulum |
| C. | nucleus |
| D. | ribosomes |
| Answer» C. nucleus | |
| 2. |
Which of following does not code for Glycine? |
| A. | AUU |
| B. | GGU |
| C. | GGA |
| D. | GGC |
| Answer» B. GGU | |
| 3. |
How many different types of Aminoacyl-tRNA synthetases are there in a cell? |
| A. | 3 |
| B. | 56 |
| C. | 90 |
| D. | 20 |
| Answer» E. | |
| 4. |
Insulin belongs to which of following category? |
| A. | protease |
| B. | enzyme |
| C. | hormones |
| D. | kinase |
| Answer» D. kinase | |
| 5. |
Which of following is a part of promoter? |
| A. | Tata box |
| B. | tat box |
| C. | poly a tail |
| D. | tandem repeats |
| Answer» B. tat box | |
| 6. |
Which of following is a symptom of alkaptonuria? |
| A. | black urine |
| B. | blue urine |
| C. | red urine |
| D. | bright yellow urine |
| Answer» B. blue urine | |
| 7. |
Complex of factors and RNA polymerase bound to template strand is called |
| A. | protein initiator |
| B. | transcription complex |
| C. | transcription starting complex |
| D. | transcription initiation complex |
| Answer» E. | |
| 8. |
Which of following is not a stop codon? |
| A. | UAA |
| B. | UAG |
| C. | UGA |
| D. | UUU |
| Answer» E. | |
| 9. |
An average protein of 400 amino acids requires how many nucleotides? |
| A. | 1200 |
| B. | 2000 |
| C. | 900 |
| D. | 100000 |
| Answer» B. 2000 | |
| 10. |
To stop translation process, which of following molecules is added instead of an amino acid to growing chain? |
| A. | oxygen |
| B. | hydrogen |
| C. | water |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 11. |
Information from mRNA is translated into which of following? |
| A. | rRNA |
| B. | tRNA |
| C. | proteins |
| D. | hormones |
| Answer» D. hormones | |
| 12. |
Which of following is a characteristic of albinos? |
| A. | lack of pigment |
| B. | lack of hearing |
| C. | lack of seeing |
| D. | lack of movement |
| Answer» B. lack of hearing | |
| 13. |
Where on ribosomes are proteins largely present? |
| A. | exterior |
| B. | interior |
| C. | scattered throughout |
| D. | clustered on side |
| Answer» B. interior | |
| 14. |
Large complex made of proteins and small RNAs that help in splicing of mRNA transcript is called |
| A. | mRNA cutters |
| B. | spliceosome |
| C. | proteasome |
| D. | exons |
| Answer» E. | |
| 15. |
Strand of DNA that is used to make mRNA strand is called |
| A. | parent strand |
| B. | template strand |
| C. | original strand |
| D. | final strand |
| Answer» C. original strand | |
| 16. |
Eyes of an albino deer are of which color? |
| A. | white |
| B. | pink |
| C. | yellow |
| D. | black |
| Answer» C. yellow | |
| 17. |
What is rate of transcription per second in eukaryotes? |
| A. | 10 nucleotides |
| B. | 40 nucleotides |
| C. | 100 nucleotides |
| D. | 1000 nucleotides |
| Answer» C. 100 nucleotides | |
| 18. |
What happens to 5 prime ends of pre mRNA? |
| A. | addition of extra nucleotides |
| B. | addition of a poly t tail |
| C. | attachment of a cap |
| D. | cutting ends |
| Answer» D. cutting ends | |
| 19. |
The degeneracy of code was originally predicted by __________________ |
| A. | Charles Darwin |
| B. | Francis Crick |
| C. | Robert Hooke |
| D. | James Watson |
| Answer» C. Robert Hooke | |
| 20. |
Which of following codons signals start of protein translation? |
| A. | UUG |
| B. | UUA |
| C. | AGU |
| D. | AUG |
| Answer» E. | |
| 21. |
Which of following is involved in sudden deaths of young athletes? |
| A. | familial cardiomyopathy |
| B. | hemophilia |
| C. | sickle cell anemia |
| D. | celiac disease |
| Answer» B. hemophilia | |
| 22. |
3-dimensional structure of a tRNA looks like which of following alphabets? |
| A. | l |
| B. | p |
| C. | s |
| D. | o |
| Answer» B. p | |
| 23. |
Which of following marks end of transcription? |
| A. | ending |
| B. | halting |
| C. | stopping |
| D. | termination |
| Answer» E. | |
| 24. |
The Philadelphia chromosome is the best studied example of ________________ |
| A. | inversion |
| B. | translocation |
| C. | deletion |
| D. | duplication |
| Answer» C. deletion | |
| 25. |
The lac operon is under positive control, a phenomenon called _________________ |
| A. | regulation |
| B. | mutation |
| C. | lactose-effect |
| D. | glucose-effect |
| Answer» E. | |
| 26. |
Which region of the tRNA molecule is highly variable? |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» C. c | |
| 27. |
Which of the following are ideal subjects for the study of rRNA synthesis and processing? |
| A. | spermatocytes |
| B. | mitochondria |
| C. | oocytes |
| D. | amphibians |
| Answer» D. amphibians | |
| 28. |
In patients of sickle cell anemia, the hemoglobin contains a substitution for ____________________ |
| A. | glutamic acid |
| B. | ascorbic acid |
| C. | carboxylic acid |
| D. | quinone |
| Answer» B. ascorbic acid | |
| 29. |
Which technique was used to find the relationship between 15S and 10S globin RNAs? |
| A. | S-loop formation |
| B. | R-loop formation |
| C. | Pulsed-field gel electrophoresis |
| D. | Polymerase chain reaction |
| Answer» C. Pulsed-field gel electrophoresis | |
| 30. |
If point mutation has an effect of phenotype of an organism, it is called |
| A. | phenotypic defect |
| B. | immune defect |
| C. | hereditary disease |
| D. | syndrome |
| Answer» D. syndrome | |
| 31. |
Initiation factors are ______________________ |
| A. | lipids |
| B. | soluble proteins |
| C. | lipopolysaccharides |
| D. | phospholipids |
| Answer» C. lipopolysaccharides | |
| 32. |
Which of following bonds attaches amino acid with tRNA molecule? |
| A. | covalent bond |
| B. | hydrogen bond |
| C. | ionic bond |
| D. | electrostatic force |
| Answer» B. hydrogen bond | |
| 33. |
Which of following bases in DNA is generally methylated? |
| A. | cytosine |
| B. | thymine |
| C. | adenine |
| D. | guanine |
| Answer» B. thymine | |
| 34. |
The transcriptional state of a cell is irreversible. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 35. |
How many post-translational modifications occur in the pre-rRNA (primary transcript)? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 36. |
What percent of genes encode transcription factors? |
| A. | 5-10 |
| B. | 15-20 |
| C. | 40-50 |
| D. | 50-60 |
| Answer» B. 15-20 | |
| 37. |
In eukaryotes, which of following help binding RNA polymerase to template strand? |
| A. | topoisomerase |
| B. | polymerases |
| C. | transcription factors |
| D. | starting factors |
| Answer» D. starting factors | |
| 38. |
How many genes are present in Drosophila genome? |
| A. | 5000 |
| B. | 10000 |
| C. | 50000 |
| D. | 40000 |
| Answer» E. | |
| 39. |
The “S” in the 80S ribosomes stands for _______________ |
| A. | Svedberg’s units |
| B. | Sedimentation coefficient |
| C. | Sulphur-labeled |
| D. | Supersonic |
| Answer» B. Sedimentation coefficient | |
| 40. |
Normal genes that code for cell cycle proteins are called |
| A. | proto-oncogenes |
| B. | oncogenes |
| C. | Virogenes |
| D. | homeotic genes |
| Answer» B. oncogenes | |
| 41. |
What is region of gene called where RNA polymerase attaches first? |
| A. | promoter |
| B. | initiator |
| C. | starter |
| D. | origin of transcription |
| Answer» B. initiator | |
| 42. |
What is fertilized egg called? |
| A. | zygote |
| B. | fetus |
| C. | toddler |
| D. | embryo |
| Answer» B. fetus | |
| 43. |
RNA interference is evolved as a genetic immune system. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 44. |
MyoD enhancer is involved in development of which of following? |
| A. | bones |
| B. | vessels |
| C. | muscle cells |
| D. | neurons |
| Answer» D. neurons | |
| 45. |
Which of the following acts as a co-repressor in tryptophan operon? |
| A. | tryptophan |
| B. | tyrosine |
| C. | glucose |
| D. | lactose |
| Answer» B. tyrosine | |
| 46. |
Mutation of ras protein can lead to abnormal activation of which of following? |
| A. | kinase cascade |
| B. | Jak/stat pathway |
| C. | immune system |
| D. | inflammation |
| Answer» B. Jak/stat pathway | |
| 47. |
How many subunits are present in a ribosome? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 48. |
After transcribing into RNA, the gene is spliced out of the genome. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 49. |
The capability of the repressor to bind the operator depends upon _____________ |
| A. | pH |
| B. | conformation |
| C. | temperature |
| D. | moisture |
| Answer» C. temperature | |
| 50. |
The lac operon consists of ____ structural genes. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |