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#Question id: 10252

When molecular oxygen is unavailable—for example, in plant roots in flooded soils—glycolysis can be the main source of energy for cells, How?

#SCPH05 I Biotechnology
  1. In O2 deprived condition, the fermentative pathways are carried out in the chloroplast, must reduce pyruvate to recycle the NAD produced by glycolysis
  2. under lowoxygen conditions (hypoxia), Pyruvate is reduce with loss of its carboxyl group as CO2 , to yield the acetyl group of acetyl-coenzyme A
  3. O2 deprived condition, the fermentative pathways are carried out in the cytosol, must reduce pyruvate to recycle the NADH produced by glycolysis
  4. pyruvate is converted under hypoxic or anaerobic conditions to propanol and CO2 by fermentative pathways  which recyle the NADH produced by glycolysis
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#Question id: 20024

#SCPH06 I Botany

Precipitation reaction are recognise by the formation of
a) Lattice
b) Agglutination
c) Ordered structure of antigen and antidody
d) Antibody must be bivalent
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#Question id: 1598

#SCPH28 | Zoology

Which of the following polypeptide is important for the expression of MHC I on the cell membrane?
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#Question id: 15637

#SCPH06 I Botany

You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.
     
Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.
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#Question id: 16126

#SCPH01 Biochemistry

2 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS, that could explain the effect of the gln2– and gln3– mutations on the regulation of GLN1.
The GLN1 gene shows a rather complex regulation in response to different amino acids. When either glutamate (glu) or glutamine (gln) is added to the medium, the amount of GS expression diminished and when both glutamate and glutamine are added to the medium GS expression is shut off completely. The effects of different mutants on the response to glu and gln are shown below.
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#Question id: 28030

#Research Methodology

When a research problem is related to heterogeneous population, the most suitable sampling method is: