Bissoy.com
Doctors Medicines MCQs Q&A

Natural proteins are composed primarily of 20 α-amino acids. Which one of the following statements is true for any of these amino acids in a solution of pH 1.5?

Natural proteins are composed primarily of 20 α-amino acids. Which one of the following statements is true for any of these amino acids in a solution of pH 1.5? Correct Answer Only the amino group is ionized

Related Questions

Consider the following statements regarding genetic code and choose the correct answer:
1. The genetic code is degenerate
2. In all amino acids the first two bases are the same in all the codons that represent a particular amino acid
3. The number of codons an amino acid can claim is proportional to the frequency of the amino acid in proteins
4. Amino acids with codons ending in U or A also have codons ending in C or G respectively
A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?
Consider the following statements related to Genetics. 1. Genetics is the study of heredity. 2. The genetic information lies within the cell nucleus of each living cell in the body.  3. Proteins are made up of one or more polypeptide chains, each of which is composed of a sequence of amino acids, and the DNA sequence of a gene (through an RNA intermediate) is used to produce a specific amino acid sequence. Which of the above statements is/are correct?
Mineral acids are stronger acids than carboxylic acids because (i) Mineral acids are completely ionised. (ii) Carboxylic acids are completely ionised. (iii) Mineral acids are partially ionised. (iv) Carboxylic acids are partially ionised.
Which of the following statements about acids are correct? (i) All compounds containing hydrogen are acidic. (ii) Acids generate H+ ions in aqueous solution. (iii) Aqueous solution of acids change the colour of turmeric into red. (iv) Aqueous solution of acids conduct electricity.
A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl.  Assume adding salt doesn’t change its volume and find the ratio of x and y. 
Proteins are made up of amino acids. These amino acids are linked together by which of the following bonds?
Human insulin molecule is composed ofone α-chain having 21 amino acids andone β-chain having 30 amino acids. How many functional insulin genes occur in adult humans?
The common amino acids are also called as alpha-amino acids because they contain their amino group attached to the alpha carbon.
Proteins are made by incorporating standard amino acids. How many standard amino acids are there in nature?