NBCE Part I Board Review- Chemistry Questions with 100 % correct answers

What is the only amino acid that does not exist in either L or D form? - Answer-Glycine What are the 3 Branched Chain Amino Acids? - Answer-1. Leucine 2. Isoleucine 3. Valine What is significant about the 3 Branched Chain Amino Acids? - Answer-They are all metabolized primarily through muscle What are the 3 aromatic Amino Acids? - Answer-1. Tyrosine 2. Tryptophan 3. Phenylalanine How are Phenylalanine and Tyrosine interrelated? - Answer-Phenylalanine can be converted into Tyrosine What is the name of the enzyme that converts Phenylalanine into Tyrosine? - Answer-Phenylalanine Hydroxylase Which classic metabolic disease is due to a deficiency of the enzyme Phenylalanine Hydroxylase? - Answer-Phenylketonuria (PKU) What are the 3 Sulfur containing Amino Acids? - Answer-1. Cysteine 2. Cystine 3. Methionine What is the term used for when two Cysteines form a covalent bond together to make a Cystine? - Answer-Di-sulfide Bond What is the first amino acid put into proteins during translation, also known as the "start codon?" - Answer-MethionineWhat is Tyrosine a precursor for? - Answer--L-Dopamine -Melanin -Norepinephrine -Epinephrine What are considered the catecholamines? - Answer--L-Dopamine -Norepinephrine -Epinephrine What is Tryptophan a precursor for? - Answer--Serotonin -Niacin Which B Vitamin is Niacin also known as? - Answer-Vitamin B3 Which co-enzymes are made from Niacin? - Answer--NAD+ -NADP+