NARAYANKAR NOTES

CLICK HERE FOR THE PDF NOTES FOR M1 SSC BOARDS 2026 IMPs (Volume 1)

 CLICK HERE FOR THE PDF NOTES FOR M1 SSC BOARDS 2026 IMPs 

Pepsin is a protein-digesting enzyme (a chemical that breaks down proteins into smaller pieces). Pepsin works only in an acidic medium (a condition where the pH is low, like in the stomach). In the stomach, hydrochloric acid (HCl) makes the environment strongly acidic. This acidic environment activates pepsin and allows it to break proteins into smaller peptides (small chains of amino acids). When food leaves the stomach, it is called chyme (semi-digested food mixed with gastric juice). This chyme enters the small intestine. The small intestine does not have an acidic environment. Instead, it has an alkaline medium (a condition where the pH is high, opposite of acidic). Bile juice, produced by the liver, enters the small intestine. Bile juice is alkaline in nature. Its main function is to neutralise (cancel the effect of) the acid present in chyme. Pancreatic juice is also released into the small intestine. Pancreatic juice contains bicarbonate ions (alkaline substances that reduce aci...

  CHEMISTRY TEST – States Of Matter  Total Marks: 50. Time: 1 hour Section A: Multiple Choice Questions (5 marks) Choose the correct answer. The unit of viscosity in CGS system is: Newton Dyne Poise Pascal For 2 moles of an ideal gas, the ideal gas equation becomes: PV = RT PV = 2RT PV = nRT PV = T At constant temperature, pressure of a gas is inversely proportional to its volume. This law is: Charles’ Law Boyle’s Law Avogadro’s Law Dalton’s Law The intermolecular forces in liquids are: Greater than solids Less than gases Greater than gases but less than solids Equal to gases Density of a gas at constant temperature and pressure is directly proportional to its: Volume Molar mass Temperature Pressure Section B: Very Short Answer ...

  14. Human Nutrition ANSWER KEY  SECTION A – MCQs (1 Mark Each) 1. Acinar cells are present in pancreas. • Acinar cells are exocrine cells of the pancreas. • These cells secrete digestive enzymes into the pancreatic duct. 2. Molars are maximum in number in human buccal cavity. • An adult human has twelve molars in total. • Molars are more in number compared to incisors, canines, and premolars. 3. Talking is not a digestive function of the tongue. • Talking is related to speech and communication. • Taste, swallowing, and mixing food with saliva are digestive functions. 4. Pepsin is a protease enzyme. • Pepsin helps in the digestion of proteins. • Protease is an enzyme that breaks down proteins into simpler substances. 5. Pepsin works best in acidic medium. • Pepsin functions effectively at a pH of about 1.5 to 2. • The acidic environment of the stomach activates pepsin. SECTION B – Short Answer (3 Marks Each) 1. Why was Shiv adv...

   14. Human Nutrition  Total Marks: 50      Time: 2 Hours                       SECTION A   Q.1 Multiple Choice Questions.           (5 Marks) 1. Acinar cells are present in: a) Liver b) Pancreas c) Gastric glands d) Intestinal glands 2. Which type of teeth are maximum in number in human buccal cavity? a) Incisors b) Canines c) Premolars d) Molars 3. Select the odd one out based on digestive function of tongue: a) Taste b) Swallowing c) Talking d) Mixing saliva in food 4. Complete the analogy: Ptyalin : Amylase :: Pepsin : ______ a) Lipase b) Galactose c) Proenzyme d) Protease 5. Which enzyme works best in acidic medium? a) Salivary amylase b) Trypsin c) Pepsin d) Nucleotidase                       SECTION B  Q.2 Short Answer Questions (Any 3)  ...