Which of the following is not a thought experiment that challenges our intuitions about Utilitarianism/consequentialism?
Which of the following molecules are geometric isomers of ea…
Which of the following molecules are geometric isomers of each other?
One of the enzymes involved in glycolysis, aldolase, require…
One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency, when the enzyme may lack zinc, the enzyme would be referred to as the:
The following are excerpts from a recent article published i…
The following are excerpts from a recent article published in the Journal of Physiology:Leucine is thought to stimulate muscle protein synthesis via the molecule α-ketoisocaproate (KIC), the biosynthesis of which is catalyzed by the enzyme branched-chain amino acid transaminase (BCAT), as shown in the figure below. In light of this, which of the following supplements would best promote muscle protein synthesis for a body builder?
Which of the following is not correct concerning 2,3-bisphos…
Which of the following is not correct concerning 2,3-bisphosphoglycerate (BPG)?
The following is an excerpt from an article recently publish…
The following is an excerpt from an article recently published in Trends in Biotechnology:While phototrophs derive their energy from light, which of the following derive their energy from the oxidation of chemical fuels?
Stereoisomers that are nonsuperimposable mirror images of ea…
Stereoisomers that are nonsuperimposable mirror images of each other are known as:
The vertebrate fatty acid synthase is a large homodimeric, m…
The vertebrate fatty acid synthase is a large homodimeric, multifunctional enzyme consisting of two polypeptides, each containing a series of catalytic domains located along the linear primary structure, as depicted in the figure below (a schematic of a single polypeptide is shown; each domain is depicted as a rectangle on the linear polypeptide). Polyketides (PK) and nonribosomal polypeptides (NRP) are two molecular families of natural products biosynthesized by many plants, bacteria, and fungi. Polyketides and nonribosomal peptides have received considerable attention because they typically demonstrate antimicrobial activity, making them attractive molecules for the development of novel antibiotics. The type I polyketide synthases are analogous to the vertebrate fatty acid synthases, in both the organization (topology) of the protein’s primary sequence and in terms of the catalytic mechanism/chemistries. A phosphopantetheinyl transferase (Ppan transferase) is required to activate a fatty acid synthase, polyketide synthase, and nonribosomal peptide synthase, by attachment of a phosphopantetheine prosthetic group. The following are excerpts from a fairly recent publication: In enzymes such as fatty acid synthases, polyketide synthases, and nonribosomal peptide synthases, acyl groups (see below) are tethered to the phosphopantetheine arm’s sulfhydryl moiety via what type of linkage?
The single letter abbreviation for the amino acid with the s…
The single letter abbreviation for the amino acid with the side chain –CH2-COO- is:
If the free energy change ΔG’o for a reaction is -46.11 kJ/m…
If the free energy change ΔG’o for a reaction is -46.11 kJ/mol, the reaction is: