The Reserve Bank of India (RBI) performs the following functions as the ‘Banker’s Bank and Supervisor’:
Banker’s Bank: The RBI acts as a banker to all scheduled commercial banks. It provides short-term funds, acts as a lender of last resort, and facilitates inter-bank clearing.
Supervisor: The RBI supervises and regulates banks to ensure financial stability. It monitors compliance with banking regulations, manages non-performing assets (NPAs), and ensures that banks maintain required reserves. These functions help in maintaining stability and liquidity in the financial system.
Draw a rough sketch for the curve $y = 2 + |x + 1|$. Using integration, find the area of the region bounded by the curve $y = 2 + |x + 1|$, $x = -4$, $x = 3$, and $y = 0$.
Study the given molecular structure of double-stranded polynucleotide chain of DNA and answer the questions that follow. 
(a) How many phosphodiester bonds are present in the given double-stranded polynucleotide chain?
(b) How many base pairs are there in each helical turn of double helix structure of DNA? Also write the distance between a base pair in a helix.
(c) In addition to H-bonds, what confers additional stability to the helical structure of DNA?