Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Write the various major steps of fermentation.

When we say 'survival of the fittest', does it mean that:

1. Those which are fit only survive.
2. Those that survive are called fit? Comment.

What is golden rice? Search on internet.

Read the sequence of the nucleotides in the given segment of mRNA and the respective amino acid sequence in the polypeptide chain.

Polypeptide: met-phe-met-proline-valine-serine
i. Provide the triplet of bases (codon) for
a. valine
b. proline
ii. Write the nucleotide sequence of the DNA strand from which this mRNA was transcribed
iii. What does the last codon of this RNA stand for?

How are translational region and untranslational regions in mRNA different from each other?

Name the cells, HIV (Human Immunodeficiency Virus)gains entry into after infecting the human body. Explain the events that occur in these cells.

Recall the experiments done by Frederick Griffith, Avery, MacLeod and McCarty, where DNA was speculated to be the genetic material. If RNA, instead of DNA was the genetic material, would the heat killed strain of Pneumococcus have transformed the R-strain into virulent strain? Explain.

How do new species arise according to de Vries mutation theory of organic evolution?

Name the interaction in each of the following:

1. Cuscuta growing on a shoe flower plant.
2. Mycorrhizae living on the roots of higher plants.
3. Clownfish living among the tentacles of sea anemone.
4. Koel laying her eggs in crow’s nest.

Do eukaryotic cells have restriction endonucleases? Justify your answer.