Self Evaluation

Q1. Microbes have the capability to produce Biopolymers:
A    with-in the cell (intracellular).
B    out-side the cell (extracellular).
C    Both with-in and out-side the cell.
D    None of the above is true

Q2. Poly-hydroxy butyrate (PHB) features:
A    accumulation with-in the cell
B    biodegradable nature
C    brittle nature
D    All of the above

Q3. Poly-hydroxy butyrate (PHB) by Wautersia eutropha:
A    is excreted by the microbes in the broth
B    is produced in the non growth associated culture metabolism of the cell only
C    is produced by either the growth as well as non growth associated culture metabolism
            of the cell
D    None of the above

Q4. Poly-hydroxy butyrate (PHB) by Azohydromonas australica:
A    is excreted by the microbes in the fermentation broth in growth phase of the culture
            metabolism
B    is excreted by the microbes in the fermentation broth in non-growth phase of the
            culture metabolism
C    is accumulated with-in the cell during the entire batch cultivation.
D    is accumulated with-in the cell during non growth associated culture metabolism of
            the microbes

Q5. PHB accumulation in Wautersia eutropha occurs:
A    when excess substrate and limiting nitrogen is available in the broth
B    when limiting nitrogen and excess substrate is available in the broth
C    all the time irrespective of substrate and nitrogen concentrations in the broth
D    only under excess substrate availability in the broth

Q6. PHB accumulation in Wautersia eutropha occurs:
A    under anaerobic conditions
B    under aerobic conditions
C    both under aerobic or anaerobic conditions
D    only under micro-aerobic conditions i.e. only under limiting oxygen availability
            conditions

Q7. PHB accumulation in Azohydromonas australica occurs:
A    under anaerobic conditions.
B    under aerobic conditions.
C    both under aerobic or anaerobic conditions
D    only under micro-aerobic conditions i.e. only under limiting oxygen availability
            conditions

Q8. Azohydromonas australica features better growth and biopolymer production on:
A    sucrose only
B    fructose only
C    either sucrose or fructose
D    glucose only

Q9. Wautersia eutropha features better growth and biopolymer production on:
A    sucrose only
B    fructose only
C    either sucrose or fructose
D    glucose only

Q10. The copolymers of PHB are prepared to:
A    improve the molecular weight of the polymer
B    to improve the processing of polymer
C    to incorporate desirable features (porousity, elasticity, strength etc) of the polymer
D    All of the above