bond, peptide bond and hydrogen bond and write against each of the
following.
a) Polysaccharide ............
b) Protein ............
c) Fat ............
d) Water ............
A: Polysaccharide - Glycosidic bond
Protein - Peptide bond
Fat - Ester bond
Water - Hydrogen bond
Q: Give one example for each of aminoacids, sugars, nucleotides and fatty acids.
A: Amino acids - Glycine
Sugars - Fructose
Nucleotides - Adenylic acid
Fatty acids - Palmitic acid
Q: Glycine and alanine are different with respect to one substituent
on the a-carbon. What are the other common substituent groups?
A: Hydrogen, carboxyl group and an amino group.
Q: Starch, Cellulose, Glycogen, Chitin are polysaccharides found among
the following. Choose the one appropriate and write against each.
a) Cotton fibre ............
b) Exoskeleton of cockroach ............
c) Liver ............
d) Peeled potato ............
A: Cotton fibre - Cellulose
Exoskeleton of cockroach - Chitin
Liver - Glycogen
Peeled potato - Starch
Q: What are primary and secondary metabolites? Give examples.
A: The organic compounds that have identifiable functions in the
living organisms are called primary metabolites.
Ex: aminoacids, sugars.
The organic compounds whole functions are not known in living
organisms are called secondary metabolites.
Ex: rubber, drugs, spices, scents, etc.
Q: Among prokaryote and eukaryotes which one has a shorter duration of
cell cycle?
A: Prokaryote
Q: Given that the average duplication time of E.coli is 20 minutes.
How much time will two E.coli cells take to become 32 cells?
A: 80 minutes.
Q: Which of the four chromatids of a bivalent at prophase-I of meiosis
can involve in cross over?
A: Non sister chromatids of a bivalent.
Q: An anther has 1200 pollen grains. How many pollen mother cells must
have been there to produce them?
A: 300.
Q: Which tissue of animals and plants exhibits meiosis?
A: Gametogenetic tissue in animals (sperm mother cells, tissue of
ovary). Gametogenetic tissue, spore mother cells (microspore mother
cells and megaspore mother cells).
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