Answer:
The correct answer is given below:
Explanation:
Caenorhabditis elegans is a round worm. It is a microscopic organism that lives in the soil. It is regarded as a model organisms because its organ systems such as nervous, muscular and reproductive are similar as in higher animals such as mice and humans. 131 cells formed in the developing embryo die by the process of apoptosis. It is a programmed cell death. The cell death is not random; but which cells will die and at what stage is completely programed.
Answer:
C. RNA polymerases.
Explanation:
Bacteria has a primitive type of RNA polymerase while archaeal RNA ploymerase is more advanced and complex than that of bacterial. The structure of archaeal RNA ploymerase has more resemblance with RNA polymerase II of eukaryotes. The RNA polymerase of bacteria requires sigma factor for transcription initiation whereas the RNA ploymerase of archaea requires transcription factors for transcription initiation just like eukaryotes.
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Your answer is : B) Two
Answer:
The 5' end has free phosphate group while the 3' end has free OH group.
Explanation:
Each DNA strand has two ends that differ from each other with respect to the functional group. The nucleotide present at the 5' end of a DNA strand has a free phosphate group. This phosphate group of other nucleotides of the DNA strand is bonded in phosphodiester bonds. Likewise, the 3' end of a DNA has a free OH group. This makes the two ends of a DNA strand quite different from each other. A DNA new nucleotide can be added to the 3' end due to the presence of a free OH group.
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