Biology Answers

Penguins and flying albatrosses might have a common ancestor.
a) how would Darwin use comparative anatomy and fossil record to establish this evolutionary relationship?
b) what modern technological advancements might further support the evolutionary relationship?

Explain why most viruses that infect humans are enveloped.

1. Calculate the isoelectric point of glutamic acid. How does the isoelectric point of glutamic acid differ from glycine.
2. Illustrate the titration curve of lysine showing the cation, zwitterion and anion on the curve.

One common feature of all DNA polymerases is that...

a. Lipid hydrolyis
b. Acrolein Test
c. Test for unsaturation
d. Test for phosphates
e. Liebermann-Burchard test

results that should be expected for ethanolamine plasmalogen

Hi, I worked as a carpenter for many years. I remember wood from the mountain sometimes was almost like cork in quality. We were told the wood might came from trees planted near the water to which their roots resisted somehow the wet environment but their wood was affected anyway. The wood had no signs of diseases, but was more soft and sometimes hard to work with. I'm talking of mahogany, cedar and pine. Does water the cause of such bad quality of wood? what happen to the wood of a tree planted near the water rather than in the middle of the mountain with good drainage? Any other reasons for tree wood ending softer and with abnormal color, almost no odor in cedar wood, out of being too much water on the ground?

Thanks for your answer in advance.

Why is Bt toxin an intracellular protein?

Somatic cells of a sick man have 46 chromosomes and lack of upper arm of 5-th chromosome. Determine the type of mutation, all possible mechanisms of it’s formation and the probability of it’s inheritance in generations.

The coding strand of DNA molecule has the sequence of nucleotides: CGT-AAG-TTC-CAG-GTA. There is a duplication of the sixth nucleotide in DNA chain. Determine the structure of m-RNA and sequence of amino acids before and after the mutation, using the table of genetic code.