7 All genes with sufficient time are ancestor of the two species and cient seque

Question

7 All genes with sufficient time are ancestor of the two species and cient sequence similarity to have evolved from a common ancestor anywhere in evolutionan, while are genes in different species that arose from the same gene in the immediate arise by duplication events within the same species A) homologs, orthologs; paralogs B) homologs; paralogs, ortholog C) D) orthologs; paralogs; homologs E) orthologs; homologs; paralogs 8 the sites of attachment of kinetochores lie in: A) centromeres 8) C) D) satellite DNA E) G bands telomeres 9. Proximity to heterochromatin can cause: A) B) decondensation C) D) position effect variegation E) transcription telomerase activity X-inactivation 10. The core histones provide the structural basis for the: A) nucleosome B) 300 angstrom fiber C) chromosome puff D) euchromatirn E) heterochromatin 11 A one. What is the most likely result? histone gene is mutated such that a positively charged amino acid is substituted with a negatively charged A) B) C) D) E) histone will be transported to nucleolus the histone will bind DNA better the histone will bind DNA less well formation of Barr bodies will be enhanced gene expression will be inhibited 12 bonds are responsible for the polymer backbone of DNA, while- complementary base pairing in DNA bonds primarily account A) ionic; hydrogen 8) covalent; hydrogen C) hydrogen; covalent D) covalent; ionic E) none of the above Uracil is present in: DNA but not RNA 13 A) B) DNA and RNA RNA but not DNA D) proteins

Explanation / Answer

Ans-7 option A is correct i.e. homologus, orthologus, paralogus

Ans-8 option A is correct i.e. centromere

Because kinetochore are proteins find on the centromere of chromatids.

Ans-9 the correct option is D i.e. position effect variegation.

Ans-10 the correct option is A i.e. nucleosome.

Ans-11 the correct option is C i.e. the histone will bind to DNA less well.

Ans-12 the correct option is B i.e. covalent, hydrogen.

Ans-13 the correct option is C i.e. RNA but not DNA.

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