Explain the Central Dogma in molecular biology.

By using the diagram,select the correct option for $X$ and $Y$.

'Central Dogma' was proposed by

$A$ $DNA$ strand is directly involved in the synthesis of the following,except:

$A$ complete set of chromosomes or cell genes inherited as a unit from a parent is known as

Read the following statements carefully and choose the correct statements.
$(A)$ In a transcription unit,the promoter is located at the $5'$ end of the coding strand.
$(B)$ The single strand $DNA$ having the polarity $5' \rightarrow 3'$ is the template strand.
$(C)$ $RNA$ polymerase binds to the operator during transcription.
$(D)$ Single base $DNA$ differences occurring in humans are called Single Nucleotide Polymorphisms $(SNPs)$.