Question

3P Question 19 Which of the following process(es) require DNA ligase function? Replication during S phase Recombination All of these require DNA ligases Nucleotide excision repair Base excision repair Question 20 3 pts The reason that genes on different chromosomes separate independently from each other is that: Different alleles of one gene separate into different daughter cells during melosis 1 Linked genes segregate independently of each other during melosis Alleles of one gene separate during Melosis il Sister chromatids separate from each other during anaphasell One tetrad orients itself at metaphase I independently of a second tetrad

Answer 1

19) All of these requires DNA ligase , the main function of the DNA ligase is the joining of the the two DNA segments or the attachment of nucleotide or base pairs in the DNA segment . In the replication process , it occurs in two segments that is continuous segment or thr okazaki fragments , the okazaki fragments are joined together by the DNA ligase . The combination is defined as the process of transfer or exchange of DNA segment between two homologous chromosomes. The exchange materials are joined in the the DNA segment by ligase enzyme . DNA ligase 3 along with the cofactors are involved in the nucleotide and base pair repair excision mechanism . DNA ligase 1 is involved in the ligation of a segement of DNA . DNA ligase are also known as molecular glue.

Hence , option 3 is the correct answer.

IDNA strand -3-(OH) + -o-P-0-5-LONA strand 0 2 Pi +ppife DNA Ligase ATP (OM NADt) AMP IDNA strandt 3-o-1-0-5 DNA strand - New 3'5'phosphodiester boud

20) sister chromatid separate from each other during anaphase 2 is the reason that genes on different chromosomes separate independent of each other. As indicated in the diagram , the two sister chromatids that are linked together in the metaphase 2 stage are separated from each other in the anaphase II . The sister chromatids are separated independent of other chromosomes as indicated from the diagram . Only a particular allele is incorporated into the gamete either from the father or mother after the process of recombination.  

Hence , option 4 is the correct answer .

11. Interphase Preophase I Metaphase - I Meiosis - I Cytokiness Telophase-I Anaphos-I Talolla. I 88 Prophas: I Meiosis-I Cytokiness 188 38.) () Metabhas Avaplar -- 09

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