JEE Exam > JEE Notes > Additional Study Material for JEE > Integer Type ques of Carbohydrates, Amino Acids, Polymers & Miscellaneous Match the Following, Past
Integer Type ques of Carbohydrates, Amino Acids, Polymers & Miscellaneous Match the Following, Past | Additional Study Material for JEE PDF Download
Q. 1. The total number of basic groups in the following form of lysine is (2010)
Ans. 2
Sol. The basic groups in the given form of lysine is NH2
Q.2. A decapeptide (Mol. wt. 796) on complete hydrolysis gives glycine (Mol. wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is (2011)
Ans. 6
Sol. Molecular weight of decapeptide = 796 g/mol
Total bonds to be hydrolysed = (10 – 1) = 9 per molecule
Total weight of H2O added = 9 × 18 = 162 g/mol
Total weight of hydrolysis products = 796 + 162 = 958 g
Total weight % of glycine (given) = 47%
Total weight of glycine in product
Molecular weight of glycine = 75 g/mol
Number of glycine molecules 
Q.3. When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is : (2012)
CHO — CH2 — CHOH — CHOH — CHOH — CH2OH
Ans. 8
Sol.
Thus, total number of stereoisomers in pyranose form of D-configuration = 23 = 8
Q.4. The substituents R1 and R2 for nine peptides are listed in the table given below. How many of these peptides are positively charged at pH = 7.0 ? (2012)
Ans. 4
Sol. (4) Peptides with isoelectric point (pI) more than 7, would exist as cation in neutral solution (pH = 7) which means the given polypeptide is of basic nature, so it must contain two or more amino groups. Hence IV, VI, VIII and IX are correct options.
Q.5. A tetrapeptide has —COOH group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe) and alanine (Ala), on complete hydrolysis. For this tetrapeptide, the number of possible sequences (primary structures) with — NH2 group attached to a chiral center is (JEE Adv. 2013)
Ans.
Sol. (4) According to question C – Terminal must be alanine and N – Terminal do have chiral carbon means it should not be glycine. So possible sequence is :
Val Phe Gly Ala
Val Gly Phe Ala
Phe Val Gly Ala
Phe Gly Val Ala
Q.6. The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is (JEE Adv. 2014)
Ans. 1
Sol. (1) On hydrolysis, the given peptide gives only one naturally occurring amino acid (glycine).
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FAQs on Integer Type ques of Carbohydrates, Amino Acids, Polymers & Miscellaneous Match the Following, Past - Additional Study Material for JEE
| 1. What are carbohydrates and what is their role in the body? |  |
Ans. Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen atoms. They are one of the main sources of energy for the body. Carbohydrates are broken down into glucose, which is used by cells for various metabolic processes and to provide energy.
| 2. How are amino acids classified and what is their importance in the human body? | |
Ans. Amino acids are classified into essential and non-essential amino acids. Essential amino acids cannot be produced by the body and must be obtained from the diet, while non-essential amino acids can be synthesized by the body. Amino acids are the building blocks of proteins and play a crucial role in various biological processes, including the synthesis of enzymes, hormones, and neurotransmitters.
| 3. What are polymers and how do they relate to carbohydrates and amino acids? | |
Ans. Polymers are large molecules made up of repeating subunits called monomers. Carbohydrates and proteins (amino acids) are examples of polymers. Carbohydrates are polymers made up of monosaccharides, while proteins are polymers made up of amino acids. Polymers provide structural support, store energy, and carry out various functions in living organisms.
| 4. What are some examples of carbohydrates and amino acids commonly found in our diet? | |
Ans. Examples of carbohydrates commonly found in our diet include glucose, fructose, sucrose (table sugar), starch, and fiber. Examples of amino acids found in our diet include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
| 5. Are there any miscellaneous facts or interesting information about carbohydrates, amino acids, and polymers? | |
Ans. Yes, here are a few interesting facts:
- Carbohydrates are classified into simple and complex carbohydrates based on their chemical structure.
- Amino acids are joined together by peptide bonds to form proteins.
- Polymers can have different properties depending on the arrangement and type of monomers they are composed of.
- Carbohydrates and proteins are essential macronutrients in our diet, providing energy and supporting various bodily functions.
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