एक सुरक्षात्मक प्रोटीन आवरण जिसे 'कैप्सिड' (capsid) कहा जाता है, निम्नलिखित में से किसमें मौजूद होता है?

Which of the following is CORRECT regarding the composition of viroids?

Why can yeast not produce alcoholic beverages with an alcohol content higher than ~13% naturally?

Which staining technique is used to differentiate bacteria into gram-positive and gram-negative based on their cell wall properties?