Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Name the association in which one species produces poisonous substance or a change in environmental conditions that is harmful to another species.

Name the two techniques that enabled the birth of modern biotechnology?

Mark the odd one in the following group.
Saliva in the mouth, Mucus coating in respiratory tract, Tear in the eyes, Acid in the stomach.

Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cereviseae is added to it.

OR

Name the metabolic pathway associated with the rising of dough in making bread. What makes the dough rise?

The egg of an animal contains 10 chromosomes, of which one is X–chromosome. How many autosomes would there be in the karyotype of this animal?

Due to an error during transcription, ATG of DNA formed UAG in mRNA.
What would happen to the polypeptide chain during translation due to this changed mRNA?

Explain homozygous and heterogeneous?

What is the difference between endemic and exotic species?

Define spermiogenesis. Where does it occur?

Write the sex of a human having XXX sex chromosomes along with 22 pairs of autosomes. Name the disorder this human suffers from.