A nervous polecat. Pyrrolysine (Pyl, O) and selenocysteine (Sec, U) are two uncommon amino acids. Knowing that these amino acids exist, translate the following amino acid sequence into one-letter code: Thr-Trp-Ile-Thr-Cys-His-Tyr-Leu-Ile -Thr-Thr-Ile-Glu-Phe-Glu-Arg-Arg-Gl u-Thr-Ala-Arg-Glu-Asn-Thr-Tyr-Pyl-S ec-Met-Ala-Leu-Phe-Pyl-Tyr.

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

- decrease the number of plants and animals living in the water.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".