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CASE STUDY;Therefore, these parts must be transparent (except for the iris and the supporting structures along the edges) and must collectively form a lens shape. The main front parts consist of the lens as well as a lens-shaped pocket of fluid called the aqueous humor and the outer surface which is called the cornea. The cornea is in direct contact with the air. It's job is to contain the aqueous humor and give it a lens-like shape.

The aqueous humor is mostly water and contains very few cells. In contrast, the cornea and lens consist of living cells which must be supplied with oxygen to stay alive. At the same time, they must also stay transparent in order to be able to focus light through. The human body solves this problem in two ways. First, it uses a clear fluid to deliver the oxygen rather than red blood. The aqueous humor itself is the clear fluid that delivers oxygen to the cells in the lens and back side of the cornea. Without red blood cells present to actively clamp on to oxygen molecules and transport them, the aqueous humor must rely on the less-efficient mechanism of simple diffusion to deliver the oxygen. Secondly, our bodies get oxygen into the cells in the front surface of the cornea by simply absorbing it from the air.

QUESTIONS

1.explain how the Rec A is interlinked to the SOS response

2.why is att P a recombination site in the phage DNA?

3.The single-stranded regions in lambda phage are called _______________ sequences.

4.justify the connection of the phage DNA as aform of the lysogens

5. Which primary viruses are best known for latent infections?

6.explain the order of events that lead to the mucus preventing viral attachment on cell

7.how does the Influenza B contribute to advanced drift than influenza A viruses

8.briefly demonstrate the history of Influenza A virus

9.classify the poxvirus family of viruses

10.explain the zoonotic transmission embarking on Rhabdovirus