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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1501 | In vasectomy, which structure is cut and tied? | Biology/Biological Studies/Biotechnology/Biochemistry Birth control and population stabilisation |
Easy |
| 1502 | How do copper-releasing IUDs prevent conception? | Biology/Biological Studies/Biotechnology/Biochemistry Birth control and population stabilisation |
Medium |
| 1503 | A couple wants a natural method based on avoiding coitus during the fertile period. Which days of a regular 2… | Biology/Biological Studies/Biotechnology/Biochemistry Birth control and population stabilisation |
Medium |
| 1504 | A woman wants a reversible contraceptive that she can take only once a week and that is non-steroidal. Which … | Biology/Biological Studies/Biotechnology/Biochemistry Birth control and population stabilisation |
Hard |
| 1505 | Which of the following STIs is not completely curable? | Biology/Biological Studies/Biotechnology/Biochemistry Sexually transmitted infections |
Easy |
| 1506 | Which practice helps prevent STIs? | Biology/Biological Studies/Biotechnology/Biochemistry Sexually transmitted infections |
Easy |
| 1507 | Hepatitis B can spread through all of the following routes except | Biology/Biological Studies/Biotechnology/Biochemistry Sexually transmitted infections |
Medium |
| 1508 | Why may STIs in women often remain untreated for a long time? | Biology/Biological Studies/Biotechnology/Biochemistry Sexually transmitted infections |
Medium |
| 1509 | A woman with an untreated STI develops a pregnancy in the fallopian tube. This complication is called | Biology/Biological Studies/Biotechnology/Biochemistry Sexually transmitted infections |
Hard |
| 1510 | In ZIFT, the zygote or early embryo is transferred into the | Biology/Biological Studies/Biotechnology/Biochemistry Infertility and assisted reproduction |
Easy |
| 1511 | The technique in which a sperm is directly injected into an ovum is | Biology/Biological Studies/Biotechnology/Biochemistry Infertility and assisted reproduction |
Easy |
| 1512 | An embryo with 16 blastomeres formed by IVF is to be transferred. Which method is suitable? | Biology/Biological Studies/Biotechnology/Biochemistry Infertility and assisted reproduction |
Medium |
| 1513 | A husband has a very low sperm count, but the wife is normal. Which simple ART technique is usually tried fir… | Biology/Biological Studies/Biotechnology/Biochemistry Infertility and assisted reproduction |
Medium |
| 1514 | A woman cannot produce ova, but her fallopian tubes and uterus are normal. A donor ovum is placed into her fa… | Biology/Biological Studies/Biotechnology/Biochemistry Infertility and assisted reproduction |
Hard |
| 1515 | In a monohybrid cross between pure tall and pure dwarf pea plants, what is the genotypic ratio in F₂? | Biology/Biological Studies/Biotechnology/Biochemistry Mendelian inheritance |
Easy |
| 1516 | Crossing an F₁ hybrid with its homozygous recessive parent to determine its genotype is called a | Biology/Biological Studies/Biotechnology/Biochemistry Mendelian inheritance |
Easy |
| 1517 | A tall pea plant crossed with a dwarf plant gives 52 tall and 48 dwarf offspring. What is the genotype of the… | Biology/Biological Studies/Biotechnology/Biochemistry Mendelian inheritance |
Medium |
| 1518 | In a dihybrid cross between RRYY and rryy pea plants, how many of 1600 F₂ plants are expected to be round and… | Biology/Biological Studies/Biotechnology/Biochemistry Mendelian inheritance |
Medium |
| 1519 | What fraction of the F₂ in a dihybrid cross (AaBb × AaBb) is expected to be homozygous for both genes? | Biology/Biological Studies/Biotechnology/Biochemistry Mendelian inheritance |
Hard |
| 1520 | A red snapdragon is crossed with a white one and the F₁ is pink. This is an example of | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Easy |
| 1521 | How many genotypes are possible for the human ABO blood group gene with alleles Iᴬ, Iᴮ and i? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Easy |
| 1522 | Parents with blood groups A (Iᴬi) and B (Iᴮi) have a child. Which blood groups are possible? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Medium |
| 1523 | Human skin colour shows a continuous range of shades. This is best explained by | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Medium |
| 1524 | In snapdragon, what proportion of F₂ plants from a pink × pink cross will breed true? | Biology/Biological Studies/Biotechnology/Biochemistry Deviations from Mendelism |
Hard |
| 1525 | Who provided experimental verification of the chromosomal theory of inheritance using Drosophila? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Easy |
| 1526 | Physical association of two or more genes on the same chromosome is called | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Easy |
| 1527 | Why is Drosophila a good organism for genetic studies? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Medium |
| 1528 | Two genes show a recombination frequency of 1.3% while another pair shows 37.2%. What does this indicate? | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Medium |
| 1529 | In a test cross of a double heterozygote AaBb (A and B on the same chromosome) with aabb, 900 offspring are p… | Biology/Biological Studies/Biotechnology/Biochemistry Chromosomal theory and linkage |
Hard |
| 1530 | In birds, the sex chromosome constitution of the female is | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Easy |
| 1531 | In grasshoppers, the male has the sex chromosome constitution | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Easy |
| 1532 | A male honey bee (drone) has how many chromosomes, and how does it form sperm? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Medium |
| 1533 | What is the probability that a human couple's third child will be a boy if their first two children are girls? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Medium |
| 1534 | In which organism does the female determine the sex of the offspring? | Biology/Biological Studies/Biotechnology/Biochemistry Sex determination |
Hard |
| 1535 | Sickle-cell anaemia results from the substitution of which amino acid at the sixth position of the β-globin c… | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Easy |
| 1536 | The karyotype of a person with Turner's syndrome is | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Easy |
| 1537 | A woman with normal vision whose father was colour blind marries a man with normal vision. What percentage of… | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Medium |
| 1538 | Why is thalassaemia described as a quantitative problem while sickle-cell anaemia is a qualitative problem? | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Medium |
| 1539 | In a pedigree, two unaffected parents have an affected daughter. What is the most likely mode of inheritance? | Biology/Biological Studies/Biotechnology/Biochemistry Mutation and genetic disorders |
Hard |
| 1540 | Which scientists proved that DNA is the genetic material using radioactively labelled bacteriophages? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Easy |
| 1541 | In Griffith's experiment, which injection killed the mice? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Easy |
| 1542 | Why was ³⁵S used to label phage protein in the Hershey–Chase experiment? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Medium |
| 1543 | Avery, MacLeod and McCarty found that transformation was blocked by which enzyme? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Medium |
| 1544 | Why is DNA preferred over RNA as the store of genetic information? | Biology/Biological Studies/Biotechnology/Biochemistry Search for the genetic material |
Hard |
| 1545 | Which bond links adjacent nucleotides in a DNA strand? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Easy |
| 1546 | A nucleosome core consists of DNA wrapped around | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Easy |
| 1547 | A double-stranded DNA sample has 20% adenine. What is the percentage of guanine? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Medium |
| 1548 | Why are histone proteins positively charged? | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Medium |
| 1549 | If the distance between two consecutive base pairs is 0.34 nm, what is the approximate total length of DNA in… | Biology/Biological Studies/Biotechnology/Biochemistry DNA structure and packaging |
Hard |
| 1550 | Which enzyme joins the discontinuously synthesised fragments of the lagging strand? | Biology/Biological Studies/Biotechnology/Biochemistry DNA replication |
Easy |