First child of both affected couple has normal, an autosomal dominant disorder. What is probability of second child of this couple would have diseased?

#Question id: 10745

#Unit 10. Ecological Principles

Releasers may be ____________.

#Question id: 12520

#Unit 6. System Physiology – Plant

#Question id: 11315

#Unit 10. Ecological Principles

Carnivores that eat herbivores in a food chain are the _________________.

#Question id: 643

#Unit 1. Molecules and their Interaction Relevant to Biology

The hydrolysis of lactose is catalysed by b-galactosidase as given below

Which of the following could be correct mechanism for this hydrolysis reaction?

A. Nucleophilic attack by the carboxylate group of Glu/Asp on the C-1 carbon atom of the galactose moiety within glucose, releasing glucose and forming an intermediate with the galactose linked to the enzyme through an ester linkage. Water then attacks this carbon atom, displacing the glutamate carboxylate and releasing galactose.

B. Electrophilic attack by the carboxylate group of Glu/Asp on the C-1 carbon atom of the galactose moiety within glucose, releasing glucose and forming an intermediate with the galactose linked to the enzyme through an ester linkage. Water then attacks this carbon atom, displacing the glutamate carboxylate and releasing galactose.

C. Nucleophilic attack by the carboxylate group of Lys/Arg/His or bivalent cation on the C-1 carbon atom of the galactose moiety within glucose, releasing glucose and forming an intermediate with the galactose linked to the enzyme through an ester linkage. Water then attacks this carbon atom, displacing the glutamate carboxylate and releasing galactose.

#Question id: 27553

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is responsible for the generation of amino acid Alanine, Cysteine, Glycine, Threonine, Tryptophan, Serine