a 25% of sodium chloride will cause the cell to burst from c.membrane. answer is b.
Answer:
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Nicked circle is the reason.
Explanation:
During recombinant DNA technology the gene of interest is ligated to plasmid DNA by excision with molecular scissors or endonuclease enzyme and ligated with enzyme ligase.
Enzyme ligase catalysed by ATP seals the nicks by making phosphodiester bonds in the ds or ss DNA and release of ADP.
The ligation in the plasmid did not occur properly hence the replication is interrupted hence no new plasmids with gene of interest replicated in the ligation carried out.
Answer: A. Cells can divide uncontrollably.
Explanation:
If the p53 gene is damaged, tumor suppression is reduced. A cell with damaged DNA may proceed with its division. <u>The daughter cells produced are likely to inherit mutations due to the unrepaired DNA of their mother cell</u>. Over many generations, cells tend to accumulate mutations. These mutations result in a p53 protein, and DNA damage can accumulate in cells which means <u>it will not able to control cell proliferation because it is unable to trigger apoptosis</u>. Such cells may continue to divide in an uncontrolled way, leading to tumor growth. This means people who inherit only one functional copy of the gene (or none) will most likely develop tumors.
The cattles are heterozygous for both the traits (horns and feet). This means that the genotype of the cattles is PpCc, and the phenotype of these cattles is 'no horns and cloven hooves'. The gametes formed will be : PC , Pc , pc , pC.
The cross between them is shown in the attached punnet square. Now, the number of off springs having the same phenotype as the parents (that is no horns and cloven hooves) are 9.
So, the probability of the off spring having the same phenotype as the parent cattles is (9 ÷ 16) × 100 = 56.25 %.