Fill In The blank : Elongation of RNA polynucleotide chain always takes place in ……………….. direction with new nucleotide always added at

Fill In The blank : Crossing over takes place in ……………………

Fill in the blanks : Electrophillic substitution reaction in phenol takes place at ………… position.

Fill In The blank : The first tRNA that is brought to the initiating codon is always ………………..

Fill up the blanks The process of perennation of species takes place by ........

Fill in the blanks : The formation of micelles take place above a particular concentration called ………

Fill in the blanks: Normally ________ takes place at 2 celled stage of pollens.

Fill up the blanks: DNA replication takes place by __________ method.

Fill in the blank spaces with appropriate answers: In the process of charging a body by conduction electron_____ takes place.

Fill up the blanks in the following paragraph by selecting the correct option. During copulation (coitus) semen is released by the penis into the vagina and is called (i)._____.the ovum released by the ovary is transported to the (ii)._____where (iii).______takes place during fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of (iv)._____The secretions of the (v)._____help the sperm enter into the cytoplasm of the ovum.