Why were micronutrients later than macro- nutrients? With one example each, mention the physiological role and deficiency disease caused by (i) nitrogen, (ii) phosphorus, (ii) copper, and (iv) iron.

Write two examples each of sexually transmitted diseases caused by (i) virus, (ii) becteria. Explain how the transmission of such diseases be prevented?

Name the vitamins whose deficiency causes (i) Night blindness (ii) Poor coagulation of blood (ii) Rickets (iv) Skin diseases.

Describe the following with one example in each case. (i) Preservatives (ii) Artificial sweeteners (iii) Antioxidants (iv) Edible colours

How many of the following statements are INCORRECT ? i. Microbes comprise of diverse organism like protozoa, bacteria, fungi and microscopic plants, viruses , viroids and also prions that are proteinaceoius infectious agents. ii. Microbes like bacteria, viruses and many fungi can be grown on nutritive media to form colonies. iii. In our stomach, the LAB plays a very beneficial role in checking disease - causing microbes. iv. 'Toddy' , a traditional drink of some parts of southern India is made by fermenting sap from sugarcane.

Giving one example in each of the following cases, discuss briefly the role of coordination compounds in (i) extraction metallurgy of metals (ii) analytical chemistry

Go through the following matches with reference to the elements and their deficiency symptoms in plants: (i) Sulphur - Reduced nodulation in legumes (ii) Boron - Whiptail disease (iii) Sulphur - Blossom and rot of tomato (iv) Nitrogen - Wrinkling of cereal grains Which of these are correct

Go through the following matches with reference to the elements and their deficiency symptoms in plants: (i) Sulphur - Reduced nodulation in legumes (ii) Boron - Whiptail disease (iii) Sulphur - Blossom end root of tomato (iv) Nitrogen - Wrinkling of cereal grains Which of these are correct

The diagram given below represents the location and structure of an endocrine gland. Study the same and answer the questions that follow: (i) Name the endocrine gland shown in the diagram. (ii) Name the secretion of the gland which regulates basal metabolism (iii) Name the mineral element required for the synthesis of the above mentioned hormone. (iv) Name the disease caused due to undersecretion of the above mentioned hormone in children. (v) Name the disease caused due to hypersecretion of the above mentioned hormone .

Read the following statements and select the option which identifies the incorrect ones. (i) Potato spindle tuber disease and Chrysanthermum stunt disease are caused by viroids. (ii) T_(4) bacteriophage exhibits lytic cycle. (iii) Retroviruses have two copies of ssRNA. (iv) Interferous which prevent viral multiplication are glycolipid particles.

The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions : (i) Identify the endocrine gland. Where is it located? (ii) Why is the above gland referred to as the 'Master gland' ? (iii) Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus ? (iv) Explain the term 'Hormone'. What is the role of Tropic hormones in the human body? (v) Which lobe of the above gland secretes: 1. Oxytocin 2. ACTH 3. Growth hormone.