Assertion : Nucleic acid complexes alone cannot cause diseases.
Reason : Only nucleoproteins can function as infectious agents.

Name some diseases caused by infectious agents

Assertion (A): Nucleic acids are macromolecules. Reason (R ): Polynucleotide strand is the backbone of nucleic acid.

Assertion : Nucleotides are phosphate esters of nucleosides. Reason : The various nucleotides in nucleic acids are linked either through purine or pyrimidine bases.

Assertion : Cancer is a non-infectious disease. Reason : Cancer impairs normal body activities only for few days.

Assertion: Only Lactobacillus lactis causes curdling of milk. Reason: Only this bacteria can produce lactic acid.

Assertion : Only Lactobacillus lactic causes curdling of milk. Reason: Only these bacteria can produce lactic acid.

Name some infectious agents which causes infectious diseases.

Assertion. Nucleic acids are strong acids. Reason. Nitrogen gives the bases of nucleic acids their basic nature.