DNA replication is studied in a newly discovered bacterium. It takes 30 min for the bacterium to complete a round of replication at 37oC. A Meselson-Stahl-type experiment was performed. The bacteria were grown for several generations in 14N-medium and then switched to 15N-medium. The DNA molecules were then analyzed.

After one generation in 15N-medium, the DNA is denatured and analyzed in a CsCl gradient. If the single-stranded DNA forms two bands, one with heavy density and one with light density, what conclusion could be drawn about the mechanism of DNA replication in this bacterium?

#Question id: 27953

#Unit 1. Molecules and their Interaction Relevant to Biology

[F26BP] concentration are related to the glycolysis, and gluconeogenesis

a.↑[F26BP] Stimulates glycolysis, and gluconeogenesis

b.↓ [F26BP] Inhibits glycolysis, and gluconeogenesis

c.↑ [F26BP] Stimulates glycolysis, inhibits gluconeogenesis

d↓ [F26BP] Inhibits glycolysis, stimulates gluconeogenesis

Select the condition of [F26BP] in which appropriate process will takes place 

#Question id: 27954

#Unit 1. Molecules and their Interaction Relevant to Biology

#Question id: 27955

#Unit 1. Molecules and their Interaction Relevant to Biology

The liver PK isozyme (L form) is regulated by

#Question id: 27956

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the enzyme differ in glycolysis and gluconeogenesis, Which of the following set of enzyme are different

#Question id: 27957

#Unit 1. Molecules and their Interaction Relevant to Biology

Bicarbonate + Pyruvate→ Oxaloacetate

a. This reaction catalyzed by pyruvate carboxylase

b. This reaction catalyzed by carbonic anhydrases

c. Uses biotin as cofactor of pyruvate carboxylase

d. Uses biotin as cofactor ofby carbonic anhydrases

#Question id: 27958

#Unit 1. Molecules and their Interaction Relevant to Biology