Question

can u please help me solving these ans......

Answer 1

2. All microbes (eg:-bacteria) are one-celled organisms with no visible organelles.  They have their DNA distributed through their cytoplasm, as opposed to other eukarotic cells that have their DNA within a nucleus.  Bacteria are easy to reproduce, meaning they are available as an inexhaustible supply.  They are also simple in structure, making them an ideal candidate to study and work with.  When trying something as intricate as DNA manipulation, it is best to start small.  DNA strands can be quite lengthy and complicated, so starting small and working your way up is recommended.  The isolation of specific gene sequences should be easier, as is the observation of the result of the genetic insertion.  There are three things that can result as the effect of genetic engineering: 1) a beneficial trait, one that helps the organism survive, 2) a negative trait, one that either helps or causes the organism to die, and 3) nothing at all, because a lot of different codons all basically produce the same trait.

3.
-----Food preservation is the inherently hopeful action of taking the edible abundance of one season and extending its useful lifespan into the future
TYPES:-
a) Smoking is the process that cooks, flavours and preserves food exposing it to the smoke from burning wood. Smoke is antimicrobial and antioxidant and most often meats and fish are smoked.  Various methods of smoking are used like Hot smoking, Cold smoking, Smoke roasting and Smoke baking. Smoking as a preservative enhances the risk of cancer.

b) Vacuum packing creates a vacuum by making bags and bottles airtight. Since there is no oxygen in the created vacuum bacteria die. Usually used for dry fruit.

c) Salting and Pickling: Salting also known as curing removes moisture from foods like meat. Pickling means preserving food in brine (salt solution) or marinating in vinegar (acetic acid) and in Asia, oil is used to preserve foods. Salt kills and inhibits growth of microorganisms at 20% of concentration. There are various methods of pickling like chemical pickling and fermentation pickling. In commercial pickles sodium benzoate or EDTA is added to increase shelf life.

4.During because,they are only a leave and able to multiply inside the cell of other living things the cell they multiply in called the host sell a virus is made up of core of genetic material DNA or RNA surrounded by a protective quotes called a capsid which is made of protein....hope it'll be helpul
@arpzh