Types of Amino Acids

Q. What is amphoteric means

Q. Which of the following is a sulphur-containing amino acid?

1. Methionine
2. Cysteine
3. Phenylalanine
4. Both (a) and (b)

Q. One of these is not an amino acid

1. Glycine
2. Uracil
3. Lysine
4. Tryptophan

Q.

Draw the structure of the amino acid, alanine.

Q.

What is the importance of amino acid sequence?

Q. Which of the following is acidic amino acid?

1. Lysine and glutamate
2. Valine and lysine
3. Glutamate and aspartate
4. Arginine and aspartate

Q. Each amino acid is unique due to the presence of:

1. Carboxylic group
2. Amine group
3. R-group
4. Benzene ring

Q. A polypeptide at a physiological pH (≃7.4) shows a net positive charge. The amino acids in this polypeptide are most likely to be

1. acidic
2. basic
3. non-polar aliphatic
4. non-polar aromatic

Q.

Does a fatty acid have an R group?

Q.

How many tripeptides does 3 different amino acids make?

Q.

Which of the following amino acid is neutral?

1. Glycine

2. Aspartic acid

3. Lysine

4. Arginine

Q.

Write the name of any one amine acid, sugar, nucleotide and fatty acid.

Q. Match the following types of amino acids with their examples:

1. Valine
2. Glutamate
3. Lysine
4. Tyrosine

Q. Calculate the molarity of HCl of strength 1.17 g/ml.

Q.

94. Which of the following statements is wrong regarding amino acids?

1. The living systems in plants can synthesize essential amino acids.

2. The living systems in animals can synthesize only essential amino acids.

3. The living systems in animals can synthesize only non-essential amino acids.

4. The living systems in plants can synthesize non-essential amino acids.

Q. Which combination of elements given here are the typical components of a protein?

1. CHO
2. CHOP
3. CHON
4. CONS

Q.

1. Tyrosine
2. Tryptophan
3. Phenylalanine
4. All of these

Q.

How would a second amino acid bond to cysteine?

Q.

Choose the amino acid which has a sulfur group

1. Tryptophan

2. Tyrosine

3. Cysteine

4. Aspargine

Q. Which of the following is a sulphur-containing amino acid?

1. Methionine
2. Cysteine
3. Phenylalanine
4. Both (a) and (b)

Q.

Which of these amino acids is NOT a hydrophilic amino acid?

1. Threonine

2. Tyrosine

3. Aspargine

4. Valine

Q. Which of the following enzymes hydrolyse proteins to $\alpha$- amino acids?

1. trypsin
2. all of the above
3. pepsin
4. chymotrypsin

Q. Which of the following is a dipeptide?

1. Cystine
2. Ornithine
3. All of these
4. Citrulline

Q. Classify Amino acids on basis of function and on basis of Nature of amino acids.

Q. Amino acids show amphoteric behaviour. Why?

Q. How many of the twenty amino acids are essential amino acids for children

1. 6
2. 8
3. 7
4. 10
5. 11

Q. Methionine, cysteine, tyrosine, glycine, alanine, etc. are different amino acids found in the proteins of living cells. What distinguishes these amino acids?

1. Location of their$N{H}_2$ group
2. Location of their-COOH group
3. The comparison of their side chain or R-group
4. Both (1) and (2)

Q. An example of a sulphur containing amino acid is ________.

1. Serine
2. Lysine
3. Cysteine
4. Tyrosine

Q. The compound, which give a positive ninhydrin test and a negative Benedict's solution test, is:

1. a disaccharide
2. a monosaccharide
3. a lipid
4. a protein

Q. ........... is the simplest amino acid which is optically inactive.

1. Glycine
2. Proline
3. Leucine
4. Tryptophan