Organisms and Populations — BIOLOGY STD 12 Science — Question

If the sequence of the coding strand in a transcription unit is written as follows:
5'-ATGCATGCATGCATGCATGCATGCATGC-3'
Write down the sequence of m-RNA

When do the oogenesis and the spermatogenesis initiate in human females and males respectively?

When the symptoms of the disease are not clearly visible for molecular diagnosis, then how is it identified?

Name the interaction that exists between sucker fish and shark.

OR

Name the type of interaction that exists between barnacles and whale.

OR

Comment on the interaction between a clown fish living among the tentacles of a sea anemone.

RNA polymerase II in eukaryotes catalyses the transcription of _________.

Choose the correct option regarding Retrovirus.

1. A DNA virus that can synthesise RNA during infection.
2. An RNA virus that can synthesise DNA during infection.
3. A ssDNA virus.
4. A dsRNA virus.

What is Ti plasmid?

Arrange the following as observed in vertical stratification of a forest: Grass, Shrubby plants, Teak, Amaranths.

A monkey can hold object by its hand elephant by its trunk. State whether in are analogous or homologous.

Name the term used for metamorphosis of spermatids?