Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

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#Question id: 2091

#SCPH01 Biochemistry

Proteins can be attached to the phospholipid bilayer plasma membrane by covalently linked hydrocarbon groups. Which of the following mechanisms are not employed in this anchoring?

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#Question id: 13083

#SCPH06 I Botany

The genomic DNA of an organism is digested with two restriction enzymes; one of the, PstI (CTGCA/G), while the other., MseI (T/TAA). This would generate the following 3 types of DNA fragments: 

(1) both ends cleaved by PstI (Pst-Pst), 

(2) both ends cleaved by MseI (Mse-Mse), and 

(3) one end generated by each of the two enzymes (Pst-Mse). 

the most frequent fragments in decreasing order,

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#Question id: 15477

#SCPH01 Biochemistry

Why these metabolites are manufactured by microbial fermentation rather than chemical synthesis 

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#Question id: 16032

#SCPH05 I Biotechnology

The major problem associated with the isolation of free cells and cell aggregates from organs is that of

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#Question id: 2105

#I Life Science/ Life Sciences Group – I-V

An investigator wants to use FRAP to quantify the lateral movement of a specific plasma membrane protein, but to do so this investigator must first: