FAQ’s about Carbohydrates and other Biomolecules in JEE

Central Board of Secondary Education (CBSE) conducts the JEE (joint entrance examination) every year. It is a platform to provide admissions to the aspiring candidates across the country, into the prestigious technical colleges of our country. Candidates must work tirelessly with intensive hard work and focus for obtaining success in this examination. Chemistry is one of the easiest subjects to score good marks in the famed JEE. The questions asked in chemistry are much simpler and take lesser time as compared to the questions asked in physics or mathematics.  A few important chapters and some concepts are highly significant as there is a pattern in which these questions repeat every year. Going through these questions will give you a fair idea about your preparation status and help you to utilize the remaining time before the examination.

Q. What are the important topics in carbohydrates and other biomolecules?

Ans. Carbohydrates and other biomolecules fall under the important topics, which will help you in scoring good in JEE. Following are the concepts that should be studied carefully:

  • Classification and structure of carbohydrates
  • Monosaccharide
  • Disaccharides
  • Polysaccharides
  • Amino acids
  • Peptides and proteins
  • Nucleic Acids

Q. How to approach a question in carbohydrates and other bio molecules?

Question: In E. coli DNA, the AT/GC ratio is 0.93. If the number of moles of adenine in the DNA sample is 558,000, calculate the number of moles of guanine present.

Solution: Number of moles of adenine must be equal to that of thymine, so

(A + T)= 558,000 + 558,000 = 1116000

Since, \(\frac{A+T}{C+G}\) = 0.93

Therefore, no of moles of C + G will be,

C + G = \(\frac{1116000}{0.93}\) = 1200000

Since number of moles of C = number of moles of G

\(\Rightarrow\) Number of moles of guanine = \(\frac{1200000}{2}\) = 600000

Books for reference

Refer NCERT textbook for class 12th. This book contains all the details in a very precise manner. A quick view of this can help you to understand the fundamental concepts and their applications. The important points are neatly mentioned in the book making it the most student-friendly book. Some other important reference books include books by O. P. Tandon and P. Bahadur. For more details download Byju’s the learning app.

Practise This Question

An electron moves with speed 2×105m/s along the positive x-direction in the presence of a magnetic induction B=^i+4^j3^k (in Tesla.) The magnitude of the force experienced by the electron in Newton's is (charge on the electron = 1.6×1019 C)