The chemical component that is invariably found in all viruses is :

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Q: 70 (SSC/NA)
The chemical component that is invariably found in all viruses is :

question_subject: 

Science

question_exam: 

SSC

stats: 

0,31,40,31,10,16,14

keywords: 

{'viruses': [2, 0, 0, 4], 'proteins': [1, 1, 0, 0], 'rna': [3, 0, 0, 1], 'chemical component': [1, 0, 0, 0], 'lipids': [1, 0, 0, 0], 'dna': [3, 1, 1, 2]}

In this question, we are asked to identify the chemical component that is always present in all viruses. Let`s analyze each option to understand why the correct answer is proteins.

Option 1: Proteins - This option states that proteins are the chemical component invariably found in all viruses. Proteins are essential for the structure and function of viruses as they help in the attachment, entry, and replication process. Therefore, this option is correct.

Option 2: Lipids - Lipids are a major component of cell membranes but are not always present within viruses. While some viruses may have a lipid outer layer called an envelope, not all viruses possess this feature. Hence, this option is not correct.

Option 3: DNA - DNA is the genetic material in living organisms but not all viruses have DNA. Some viruses have RNA as their genetic material. Hence, this option is not correct.

Option 4: RNA - RNA is the genetic material in some viruses, known as RNA viruses. However, there are viruses that have DNA instead. Therefore, this option is not correct.

In conclusion, the correct answer is option 1 - proteins.