The lagging strand is characterized by a series of short segments of DNA (Okazaki fragments) that will be joined together to form a finished lagging strand. The experiments that led to the discovery of Okazaki fragments gave evidence for which of the following ideas?

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#Question id: 11227

#Unit 9. Diversity of Life Forms

Mycoplasmas are bacteria that lack cell walls. Based on this structural feature, which statement concerning mycoplasmas should be true.

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#Question id: 10380

#Unit 6. System Physiology – Plant

Two separate processes, the first involves a signaling pathway that facilitates the infection process itself and  the second involves the activation of a set of genes that regulate the formation of root nodules. Which of the following receptor is thought to participate in both processes?

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#Question id: 116

#Unit 1. Molecules and their Interaction Relevant to Biology

A compound containing N-acetylneuraminic acid (sialic acid) is:

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#Question id: 24217

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement of the following

a. In general, high acetyl-CoA or citrate are present, or when a high proportion of the cell’s adenylate is in the form of ATP, gluconeogenesis is favored.

b. When the level of AMP increases, it promotes glycolysis by stimulating PFK-1 by inhibiting FBPase-1

c. Phosphorylation of fructose 6-phosphate, catalysed by phosphofructokinase-2 (PFK-2)

d. Glucagon increases the cellular level of fructose 2,6 bisphosphate, stimulating glycolysis and inhibiting gluconeogenesis.

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#Question id: 481

#Unit 1. Molecules and their Interaction Relevant to Biology

In the phosphoglycerate mutase reaction, the side chain of which amino acid in the enzyme is transiently phosphorylated as part of the reaction?