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Question
Name two α-amino acids which form a dipeptide which is 100 times more sweet than cane sugar?
Solution
Aspartic acid and phenylalanine are two a-amino acids that form the methyl ester of dipeptide and named as aspartame (an artificial sweetener) which is 100 times more sweet than cane sugar.
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Write ‘four’ physical methods of preserving food materials
Mr. Roy, the principal of one reputed school organized a seminar in which he invited parents and principals to discuss the serious issue of diabetes and depression in students. They all resolved this issue by strictly banning the junk food in schools and to introduce healthy snacks and drinks like soup, lassi, milk etc. in school canteens. They also decided to make compulsory half an hour physical activities for the students in the morning assembly daily. After six months, Mr. Roy conducted the health survey in most of the schools and discovered a tremendous improvement in the health of students.
After reading the above passage, answer the following :
(i) What are the values (at least two) displayed by Mr. Roy ?
(ii) As a student, how can you spread awareness about this issue ?
(iii) What are tranquillizers ? Give an example.
(iv) Why is use of aspartame limited to cold foods and drinks ?
Why do we require artificial sweetening agents?
Why is use of aspartame limited to cold foods and drinks?
Explain any two chemical methods of food preservation.
Which of the following chemicals can be added for sweetening of food items at cooking temperature and does not provide calories?
Which of the following are not used as food preservatives?
(i) Table salt
(ii) Sodium hydrogencarbonate
(iii) Cane sugar
(iv) Benzoic acid
Aspartame is unstable at cooking temperature, where would you suggest aspartame to be used for sweetening?
Assertion: All chemicals added to food items are called food preservatives.
Reason: All these chemicals increase the nutritive value of the food.
