Deficiency of Vitamin D in children causes of disease
1. Beri beri
2. Rickets
3. Pelagra
4. Anaemia

The oxidization state of nitrogen in N₃H is

1)  - 1/3

2)  + 1/2

3)  + 3

4)  - 1

 Mechanical tissue is well developed in plants which are

1) hydrophytic
2) epiphytic
3) xerophytic
4) parasitic

The number of sodium atoms in 2 moles of sodium ferrocyanide is

1)  8 x 6.02 x 10²³

2)  4 x 6.02 x 10²³

3)  6.02 x 10²³

4)  2

Which of the following is used as a sources of hydrogen for filling of balloons that is convenient and can be carried around?

1) Lithium hydride
2) Sodium borohydride
3) Calcium metal
4) Sodium formate

The number of optical isomers formed by hydrogenation of the compound, (CH₃)₂C = CHCH₃ are

1) 1
2) 2
3) 3
4) zero

How many autosomes will be seen secondary spermatocyte
1. 46
2. 44
3. 23
4. 22

Which is a breeding method used by humans to produce new and improved varieties of plants and animals?

1. independent assortment
2. crossing-over
3. artificial selection
4. natural selection

The one which decreases with dilution is

1) molar conductance

2) conductance

3) specific conductivity

4) None of these

The nuclesomes are called
1. Bar-bodies 
2. Nu-bodies 
3. Plasmids 
4. Chromosomes