MIUN Free NEET Quiz Unit 7

1. The operon’s activity is controlled by the amount of lactose in the surrounding medium, which allows enzyme synthesis to be regulated by its substrate.

2. Alfred Sturtevant found a way to map the genes on the chromosomes.

3. Down’s syndrome is caused by trisomy of chromosome 21, resulting in 47 chromosomes.

4. Banding pattern, in genetic fingerprinting, do not differ between homozygotic twins.

5. Despite the availability of whole-genome sequences and advanced high-throughput technologies, researchers are unable to address questions in a more systematic or broader manner.

6. Mendel used the term ‘factors,’ now we call them as genes.

7. The hallmark of DNA’s double-stranded helical structure is not the hydrogen bonding between the bases of opposite strands.

8. The strength of linkage between w and m is higher than y and w.

9. In pea plants the pair of alleles for stem height would be only TT, Tt but not tt.

10. Arthropods shows different types of sex determinations.

11. In cases where proteins are similar but occur in unrelated organisms and perform different functions, the situation still represents divergent evolution.

12. Similar genes in similar organisms performing dissimilar functions is an example of divergent evolution.

13. Some characters are dominant over others.

14. Assigning the genetic and physical maps on the genome are not a challenging task.

15. Genes which code for a pair of contrasting traits are known as alleles, i.e., they are entirely different forms of the same gene.

16. The Mendel’s laws were extended in the form of ‘Chromosomal Theory of Inheritance.’

17. Flying phalanger is a placental mammal.

18. Phenylketonuria patients lack an enzyme that converts the amino acid phenyl into tyrosine.

19. The accessibility of promoter regions of prokaryotic RNA is often regulated by the interaction of proteins with sequences termed operators.

20. While DNA is used for storing genetic material, RNA primarily assists in the transfer and expression of this information.

21. Recessive traits are only expressed in a homozygous condition and never blend in a heterozygous condition.

22. The messenger RNA contains base sequences that are read in triplets (genetic codons) to specify amino acids.

23. For the first time statistical analysis and mathematical logic were applied to problems in biology by Hardy and Weinberg.

24. In Turner’s syndrome, one X chromosome is missing, and the sex chromosome is as XO, and in Klinefelter’s syndrome, the condition is XXY.

25. To understand the origin of life, we need to understand the evolution of stars.

26. Fossils discovered in Java in 1891 revealed Homo erectus lived about 1.5 bya.

27. Stars are the part of the galaxy.

28. Male honey bee do not have grandfather and thus cannot have grandsons.

29. Most scientists believe chemical evolution, i.e., formation of biomolecules preceded the appearance of the first cellular forms of life.

30. Marsupial mouse is a placental mammal.

31. Accumulation of phenylalanine derivatives in brain results in physical retardation.

32. RNA did not evolve first, and DNA is not believed to have been derived from it.

33. Both the DNA strands are not having the same sequence while reading the same direction.

34. The origin of life is not considered as a unique event in the history of the universe.

35. Klinefelter’s syndrome – short stature with feminised character.

36. Bandicoot is a placental mammal.

37. In eukaryotes, however, genes are split, with coding sequences (exons) interrupted by non-coding sequences (introns).

38. Pod colour is a character.

39. A pure-line is one that, having undergone continuous self-pollination, shows the stable trait inheritance and expression for many generations.

40. The subsequent events regarding the first forms of life are based on Darwinian ideas of organic evolution by natural selection.

41. Similar proteins in dissimilar organisms performing similar functions is an example of convergent evolution.

42. Autoradiogram bands in a nylon membrane give a characteristic pattern for an individual DNA.

43. Scientists can examine all the genes in a genome, such as the transcripts in a specific tissue, organ, or tumor, and investigate how thousands of genes and proteins interact within complex networks to coordinate the chemistry of life.

44. DNA fingerprinting has extensive applications in forensic science, genetic biodiversity, and evolutionary biology.

45. The recessive characters are only expressed in homozygous conditions.

46. Anteater is a marsupial mammal.

47. Fossils discovered in Java in 1891 revealed Homo habilis lived about 1.5 mya, had a cranial capacity of 650cc, probably ate meat.

48. Among the various evolutionary narratives, the evolution of modern humans is particularly fascinating, closely paralleling the evolution of the human brain and language.

49. Complementarity means identical.

50. One of the rRNAs does not serve as a catalyst for peptide bond formation, making it not an example of an RNA enzyme (ribozyme).