Question

.  Viruses

Why it is not right to call them living things? _________________________

Sort out some information about different human DNA and RNA viruses, complete the following table:

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Name: DNA or RNA virus? reproduces alters human DNA

in cytoplasm or nucleus? or not?

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Herpes virus

Mumps virus

HIV virus

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Something to think about: corona virus has size 120 nm ( remember? 1 nm= 0.000001 mm)

Single-use face mask can trap particles with size of 3000 nm and bigger. Surgical level 1 mask can trap particles with size 100 nm. Which mask can really protect you from air-born corona virus? __________________

Using simple mask could protect OTHER PEOPLE from your droplets in case you sneeze or cough.

More about corona virus. List all chemicals this infective agent is made of : ______________

Which one of these chemicals would be detached from virus particles by soap/detergent and destroy virus? ___________________________________

What you have to do to keep your immune system strong? _________________________

8.  Gene regulation. Please, read about it on Pages! Answer the following questions:

-- what causes the tortoiseshell pattern on a cat? _______________________________

-- in case of bacteria E. coli, which chemical has to be present to start production of enzymes to break down milk sugar?

Answer 1

** Viruses don't contain cells , rather do not use energy. It is only active if it comes in contact with the host cell. So it is not considered as a living thing.

** DNA Virus :- has dna as genetic material. Ex - herpes virus , Mimi virus , etc.

RNA Virus :- has rna as a genetic material. Ex- COVID-19 , Ebola virus, common cold etc

DNA alters in nucleus.

** Herpes virus:- It is a DNA virus. After initial infection, the virus gets into the nerve roots and spreads to the sensory nerve ganglia.

Mumps virus:- It is a RNA virus. It infect pancreatic beta cells.

HIV virus :- It stands for Human Immunodeficiency Virus. It is transferred in blood, semen or vaginal fluid.

** N95 respirator mask

** Viruses consist of : ribonucleic acid (RNA), proteins and lipids.

The viralself-assembly is based on weak “non-covalent” interactions between the proteins, RNA and lipids. Together, these act together like Velcro, so it is hard to break up the self-assembled viral particle. Still, we can do it — with soap!

**Sleep like a regular human being.
Eat more garlic.Drink lemon, honey, ginger and turmeric with warm water. Make a batch of chicken soup.Make workouts a part of your weekly regimen.Indulge in tea time.Have yogurt for breakfast.Soak up some sun.

** One form of the gene codes for orange fur (XB), and the other form codes for black fur (Xb).  A female cat heterozygous at that locus (XBXb) will not be orange. Instead, her coat will be a patchwork of orange and black, a condition known as tortoiseshell.

**  Chemical that has to be present to start production of enzymes to break down milk sugar is Lactases.