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. |
In human cell nucleus, at least _____ percent of DNA has been derived from transposable elements. |
| A. | 10 |
| B. | 25 |
| C. | 30 |
| D. | 45 |
| Answer» E. | |
| 2. |
Human MN blood group is an example of which of following? |
| A. | totally dominant |
| B. | incomplete dominant |
| C. | codominant |
| D. | semi dominant |
| Answer» D. semi dominant | |
| 3. |
When a gene has multiple phenotypic effects it's called |
| A. | Polytropy |
| B. | Multitropy |
| C. | Genotropy |
| D. | pleiotropy |
| Answer» E. | |
| 4. |
Purines are a type of nitrogenous bases that consist of _____ ring(s). |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 5. |
Second filial generation produced by first generation pollinating itself is called |
| A. | F2 |
| B. | F1 |
| C. | p |
| D. | F4 |
| Answer» B. F1 | |
| 6. |
Which of the following was discovered by Chargaff’s experiment in 1950? |
| A. | base composition |
| B. | base stacking |
| C. | gene morphology |
| D. | chromosome morphology |
| Answer» B. base stacking | |
| 7. |
The three-dimensional structure of DNA can be described by _________ |
| A. | Vacuum filtration |
| B. | X-ray crystallography |
| C. | Gel electrophoresis |
| D. | Mass spectroscopy |
| Answer» C. Gel electrophoresis | |
| 8. |
On which of following chromosomes, allele for Huntington's disease is located? |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 9 |
| Answer» C. 6 | |
| 9. |
Etoposide and doxorubicin, the drugs used in Cancer treatment target the enzyme ___________ |
| A. | topoisomerase I |
| B. | topoisomerase II |
| C. | helicase |
| D. | isomerase |
| Answer» C. helicase | |
| 10. |
The supercoiled state of DNA was first discovered in the year __________ |
| A. | 1943 |
| B. | 1953 |
| C. | 1963 |
| D. | 1973 |
| Answer» D. 1973 | |
| 11. |
Sickle cell anemia is caused by substitution of how many amino acids in hemoglobin gene? |
| A. | 2 |
| B. | 1 |
| C. | 5 |
| D. | 10 |
| Answer» C. 5 | |
| 12. |
Which of the following is an intervening, non-coding sequences? |
| A. | intron |
| B. | exon |
| C. | axon |
| D. | axiom |
| Answer» B. exon | |
| 13. |
Which of following scientists discovered basic rules of inheritance using pea plants? |
| A. | Darwin |
| B. | Mendel |
| C. | Watson |
| D. | crick |
| Answer» C. Watson | |
| 14. |
Which of the following type of repeating sequence arise due to transposition of elements? |
| A. | moderately repeating sequences |
| B. | microsatellite DNA |
| C. | minisatellite DNA |
| D. | satellite DNA |
| Answer» B. microsatellite DNA | |
| 15. |
What is incidence of phenylketonuria? |
| A. | 1 in 10,000 |
| B. | 1 in 500 |
| C. | 1 in 10 |
| D. | 1 in 5000 |
| Answer» B. 1 in 500 | |
| 16. |
Some of the fastest evolving genes encode for proteins involved in _________________________ |
| A. | regulation of gene expression |
| B. | reproducing ability |
| C. | survival |
| D. | prevention of infection |
| Answer» B. reproducing ability | |
| 17. |
The AMY1 gene encodes for __________ |
| A. | lysosome |
| B. | amylase |
| C. | lipase |
| D. | topoisomerase |
| Answer» C. lipase | |
| 18. |
What percentage of DNA in humans are introns? |
| A. | 30 |
| B. | 20 |
| C. | 60 |
| D. | 39 |
| Answer» C. 60 | |
| 19. |
What is scientific name for orangutan? |
| A. | pongo pygmaeus |
| B. | Zea mays |
| C. | drosophila melanogaster |
| D. | Mus musculus |
| Answer» B. Zea mays | |
| 20. |
Which of following tends to have larger genomes? |
| A. | archaea |
| B. | protists |
| C. | prokaryotes |
| D. | eukaryotes |
| Answer» E. | |
| 21. |
In which year was human genome project completed? |
| A. | 1990 |
| B. | 2001 |
| C. | 2002 |
| D. | 2003 |
| Answer» E. | |
| 22. |
Which of following is another name for Transposition? |
| A. | jumping genes |
| B. | moving genes |
| C. | travelling genes |
| D. | multiple genes |
| Answer» B. moving genes | |
| 23. |
The process by which a single gene can code for multiple proteins is called ___________ |
| A. | transcription |
| B. | transformation |
| C. | alternative splicing |
| D. | sequencing |
| Answer» D. sequencing | |
| 24. |
For three different samples of DNA with same concentration, the rate of annealing will depend on __________ |
| A. | pH |
| B. | absorbance |
| C. | temperature |
| D. | genome size |
| Answer» E. | |
| 25. |
In which of following disease brain cells of a child cannot metabolize certain lipids because a crucial enzyme does not work properly? |
| A. | fragile x syndrome |
| B. | Tay Sach's |
| C. | down syndrome |
| D. | parkinson's disease |
| Answer» C. down syndrome | |
| 26. |
The process of DNA melting can be monitored by a change in ___________ |
| A. | absorbance |
| B. | pH |
| C. | concentration |
| D. | color |
| Answer» B. pH | |
| 27. |
Down syndrome is most common in children who are born to women |
| A. | over the age of 30 |
| B. | under the age of 30 |
| C. | under the age of 25 |
| D. | under the age of 20 |
| Answer» B. under the age of 30 | |
| 28. |
What is haploid genome size of archaea Archaeoglobus fulgidus? |
| A. | 2.2 mb |
| B. | 3.3 mb |
| C. | 4.5 mb |
| D. | 5.6 mb |
| Answer» B. 3.3 mb | |
| 29. |
Trait that shows in all of first-generation offspring of two different true-bred plants is said to be |
| A. | intermediate |
| B. | recessive |
| C. | dominant |
| D. | stronger |
| Answer» D. stronger | |
| 30. |
Achondroplasia is a form of which of following? |
| A. | dwarfism |
| B. | polio |
| C. | attached lobes |
| D. | small pox |
| Answer» B. polio | |
| 31. |
What is the width of the DNA double helix? |
| A. | 1 nm |
| B. | 2 nm |
| C. | 3 nm |
| D. | 4 nm |
| Answer» C. 3 nm | |
| 32. |
What percentage of human genome is made up of transposable elements? |
| A. | 11 |
| B. | 22 |
| C. | 33 |
| D. | 44 |
| Answer» E. | |
| 33. |
What is haploid genome size of nematode Caenorhabditis elegans? |
| A. | 200 mb |
| B. | 100 mb |
| C. | 500 mb |
| D. | 1000 mb |
| Answer» C. 500 mb | |
| 34. |
Which of the following regions is involved in the development of brain? |
| A. | HAR |
| B. | ARF |
| C. | ATP |
| D. | SAR |
| Answer» B. ARF | |
| 35. |
What is haploid genome size of rice Oryza sativa? |
| A. | 500 mb |
| B. | 1000 mb |
| C. | 430 mb |
| D. | 100 mb |
| Answer» D. 100 mb | |
| 36. |
Which of following is considered an extinct species of humans? |
| A. | home sapiens |
| B. | pongo pygmaeus |
| C. | Zea mays |
| D. | homo neanderthalensis |
| Answer» E. | |
| 37. |
The DNA structure was investigated in the year __________ |
| A. | 1943 |
| B. | 1953 |
| C. | 1963 |
| D. | 1973 |
| Answer» C. 1963 | |
| 38. |
Which of following describes usage of computational methods to store biological data? |
| A. | biophysics |
| B. | bioinformatics |
| C. | Biocomputing |
| D. | industrial biology |
| Answer» C. Biocomputing | |
| 39. |
Which of following rule suggests that probability of two or more events occurring together is equal to product of individual probabilities of independent single events? |
| A. | multiplication rule |
| B. | division rule |
| C. | addition rule |
| D. | subtraction rule |
| Answer» B. division rule | |
| 40. |
Which of following results from cystic fibrosis? |
| A. | thick mucus |
| B. | blocked arteries |
| C. | tumor |
| D. | loss of neurons |
| Answer» B. blocked arteries | |
| 41. |
Unequal crossing over takes place due to _______________ of chromosomes. |
| A. | denaturation |
| B. | misalignment |
| C. | aggregation |
| D. | condensation |
| Answer» C. aggregation | |
| 42. |
Which of the following is used to visualize DNA molecules in a gel? |
| A. | ethidium bromide |
| B. | methylene blue |
| C. | safranin |
| D. | bromophenol blue |
| Answer» B. methylene blue | |
| 43. |
Which of following denoted a homozygous recessive gene? |
| A. | wv |
| B. | ww |
| C. | wx |
| D. | wo |
| Answer» C. wx | |
| 44. |
The temperature at which the shift in absorbance is half completed is termed as ___________ |
| A. | melting temperature |
| B. | denaturation temperature |
| C. | shifting temperature |
| D. | absorbance temperature |
| Answer» B. denaturation temperature | |
| 45. |
DNA transposons found in the human genome are capable of movement. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 46. |
About what percentage of coding sequence of DNA is transcribed into tRNA and rRNA? |
| A. | 1.5 |
| B. | 3 |
| C. | 4 |
| D. | 8 |
| Answer» B. 3 | |
| 47. |
Which hypothesis was proposed by Susuma Ohno in 1971? |
| A. | 2R hypothesis |
| B. | 2T hypothesis |
| C. | 2S hypothesis |
| D. | 2P hypothesis |
| Answer» B. 2T hypothesis | |
| 48. |
Gene duplication occurs by unequal crossing over. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 49. |
Proteins can interact with a DNA molecule by ____________________ |
| A. | fitting into the grooves |
| B. | interacting with the base pairs |
| C. | hydrophilic interactions |
| D. | covalent linkages |
| Answer» B. interacting with the base pairs | |
| 50. |
Which type of DNA have been used to analyze relationship between different human populations? |
| A. | Circular DNA |
| B. | Mitochondrial DNA |
| C. | Minisatellite DNA |
| D. | Microsatellite DNA |
| Answer» E. | |