Under alkaline conditions (0.1 M KOH) the molar absorptivities of the amino acids Trp and Tyr at 240 and 280 nm are given. A 10 mg sample of the protein glucagon is hydrolyzed and diluted into 100 mL of 0.1 M KOH. For a 1 cm path length cell, the absorbance of the solution is 0.717 at 240 nm and 0.239 at 280 nm. What is the concentration of Trp? tyrosine €240 = 11,300 M-7 cm-1 €280 = 1500 M-7cm-1 tryptophan €240 = 1960 M-1 cm-1 €280 = 5380 M-1 cm-1

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

The answer is nitrogen-containing bases