Biology - Objective Questions with Answers

Questions
56 The structure of the chromosome to which spindle fibre is attached is
A Chromatid
B Telomere
C Centromere
D Chromomere

Answer: Option [C]

The structure of the chromosome to which spindle fibre is attached is Centromere. The centromere is the part of a chromosome that links sister chromatids. During mitosis, spindle fibres attach to the centromere via the kinetochore.

57 Who used the word 'chromosome'?
A Huxley
B Flemming 1888
C Kollikar 1888
D Waldeyer 1888

Answer: Option [D]

The correct answer is Waldeyer 1888. The term Chromosom was first suggested by the German anatomist Heinrich Wilhelm Gottfried von Waldeyer-Hartz in "Ueber Karyokinese und ihre Beziehungen zu den Befruchtungsvorgängen," Archiv für mikroskopische Anatomie, Band 23 (1888), p.

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58 Polytene chromosomes were first observed by
A Batanetzky-1980
B Heitz and Bauer-1935
C Balbiani-1881
D Stevens and Wilson-1905

Answer: Option [C]

Polytene chromosomes were first observed by Balbiani-1881. Polytene chromosomes were first discovered in the 1880s in insects (Balbiani 1881). One of the earliest published examples of polytene chromosomes is of Chironimus salivary gland chromosomes found in Walther Flemming's 1882 book, Zellsubstanz, Kern, und Zelltheilung (Flemming 1882).

59 The structure present over chromosome is
A Nucleolus
B Centromere
C Centrochrome
D Golgi bodies

Answer: Option [B]

The structure present over chromosome is Centromere. Centromere is a region of chromosomes which holds sister chromatids together and the area where chromosome are attached to spindle fibres during cell division.

60 A genome is the
A Diploid set of chromosomes
B Haploid set of chromosomes
C Triploid set of chromosomes
D All the above

Answer: Option [B]

A genome is the Haploid set of chromosomes. A genome can be defined as the haploid set of chromosomes in a gamete or microorganism, or in each cell of a multicellular organism. A genome is an organism's complete set of DNA, including all of its genes. Each genome contains all of the information needed to build and maintain that organism.

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