THE MOLECULAR BASIS OF INHERITANCE
THE GENETICS OF VIRUSES AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Viruses can eat and metabolize food.
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Viruses can reproduce only using a host cell.
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Viruses can reproduce on their own at any time.
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Viruses contain DNA, so they are alive.
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Detailed explanation-1: -A virus is a tiny, infectious particle that can reproduce only by infecting a host cell. Viruses “commandeer” the host cell and use its resources to make more viruses, basically reprogramming it to become a virus factory. Because they can’t reproduce by themselves (without a host), viruses are not considered living.
Detailed explanation-2: -A virus is an infectious agent that can only replicate within a host organism. Viruses can infect a variety of living organisms, including bacteria, plants, and animals.
Detailed explanation-3: -Which statement best explains why viruses can only reproduce within a host? Viruses lack the ribosomes necessary to make their own proteins.
Detailed explanation-4: -Viruses are smaller than the bacteria. Viruses consists of a genetic material (DNA or RNA) as well as a protein coat. Viruses require the host cell to reproduce. They are inactive outside the host cell.
Detailed explanation-5: -Complete answer: All viruses are obligate parasites, i.e., they lack metabolic machinery of their own to generate energy or to synthesize proteins, hence they depend on the host cells to carry out these vital functions.