Are they folding?

(A) Tertiary structure of proteins represents overall folding i.e. further folding folding of 2^(@) structure. (R) 2^@ & 3^@ structures of protein stabilized by hydrogen bonds disulphide linkages, vander waals & electrostatic force of attraction.

In which direction the folding of the leaves takes place?

In which direction the folding of the leaves take place?

(A) The folding of polypeptide chains leads to globular proteins. (R) Globular structure is a part of secondary structure of protein.

An open top box of maximum possible volume from a square piece of tin of side 'a' is to be made by cutting equal square out of the corners and then folding up the tin to form the sides. Show that the length of the side of the square cut out is a/6.

Draw a circle on a paper and cut it along its edge. Fold it into half and again fold it to one fourth to make folding marks as shown .You will observe a point in the middle. Mark this O. This is the centre of the circle. You can also indicate its radius.How many radii can you draw in a circle ?.

In the figures given below find the axes of symmetry such that on folding along the axis the two dots fall on each other.