The chemical component that is invariably found in all viruses is (1) proteins (2) lipids (3) DNA (4) RNA

The chemical component that is invariably found in all viruses is (1) proteins (2) lipids (3) DNA (4) RNA
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(1) proteins Explanation: All viruses contain the following two components: a nucleic acid genome and a protein capsid that covers the genome. Together this is called the nucleocapsid. The proteinous coat surrounds and protects the genetic material. In addition, many animal viruses contain a lipid envelope. The entire intact virus is called the virion.
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The flow of genetic material in microbial cells usually takes place from A- RNA through DNA to proteins B- proteins through RNA to DNA C- .DNA through RNA to proteins D- none of these

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Last Answer : Answer : B

The mechanism of antibacterial action of tetracycline involves (a) Binding to a component of the 50S ribosomal subunit (b) Inhibition of translocase activity (c) Blockade of binding of aminoacyl – tRNA to bacterial ribosomes (d) Selective inhibition of ribosomal peptidyl transferases (e) Inhibition of DNA–dependent RNA polymerase

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Last Answer : Ans: C

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Last Answer : Answer : A

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Last Answer : Answer : D