Cement shop owner: Falls under self-employed as the individual owns and manages the business independently.
Construction worker: Classified as a casual wage worker as they work temporarily for wages on various projects.
Civil engineer: Regular salaried professional employed in companies or institutions.
Read the following text carefully from ‘The Economic Times’ dated 8th June, 2023: “The Reserve Bank of India’s (RBI’s) rate-setting panel unanimously decided to keep the benchmark lending rate unchanged at 6.5%. The committee voted to remain focused on the withdrawal of accommodating monetary policy.” On the basis of the given text and common understanding, answer the following questions: Identify and discuss the economic issue indicated in the above text.
For a hypothetical economy, assume the government increased infrastructural investment by ₹10,000 crore. 80% of additional income is consumed in the economy. Estimate the increase in income and the corresponding increase in consumption expenditure in the economy.
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?
