Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

What are ecological pyramids and how are they formed. Explain there different types

What are bioreactors? List five growth conditions that a bioreactor provides for obtaining the desired product.

1. Identify the polarity from a to a', in the above diagram and mention how many more amino acids are expected to be added to this polypeptide chain.
2. Mention the DNA sequence coding for serine and the anticodon of tRNA for the same amino acid.
3. Why are some untranslated sequence of bases seen in mRNA coding for a polypeptide? Where exactly are they present on mRNA?

Trace the development of female gametophyte (embryo sac) from megaspore mother cell in a flower. Give a labelled diagram of the final stage of female gametophyte.

Both a wine maker and a molecular biologist who had developed a recombinant vaccine claim to be biotechnologists. Who in your opinion is correct?

A person has been diagnosed to be HIV positive.

1. Name the test which the person underwent.
2. Write the full name of the pathogen involved and describe its structure.
3. Which particular cells of this person are likely to get destroyed?

Which part of the blastula is destined to form the germ layers of the developing embryo in humans?

For a layman, both apple and banana are fruits. But a biology student categorises fruits as true fruits, false fruits and parthenocarpic fruits. Justify.

1. Construct a complete transcription unit with promoter and terminator on the basis of the hypothetical coding strand given below.

2. Write the RNA strand transcribed from the above transcription unit along with its polarity.