1.From which amino acid are thyroxine and catecholamines synthesized?
2.Which amino acid is predominantly lost through urine in Hartnup disease?
3.Identify the component that is not found in the structure of a hemoglobin molecule.
4.In what form are proteins absorbed from the gastrointestinal tract?
5.Which amino acid serves as a starting material for the synthesis of protoporphyrin?
6.What type of proteins are cytochromes classified as?
7.What is the chemical nature of the heme group found in hemoglobin?
8.Which sequence correctly represents the breakdown process of hemoglobin (Hb)?
9.Which amino acid serves as a precursor in the metabolic synthesis of creatine?
10.What is the primary compound responsible for ammonia production in the kidney?
11.Which enzyme plays a crucial role in the synthesis of urea?
12.In the liver, ammonia is converted into which compound to reduce its toxicity?
13.Which small calcium-binding protein regulates the function of various enzymes and proteins by responding to fluctuations in Ca²⁺ levels?
14.Which amino acid undergoes decarboxylation to produce a compound that acts as a vasodilator?
15.What type of mutation changes a codon that encodes an amino acid into a stop codon?
16.Which biochemical process transforms histidine into histamine?
17.Which organ is responsible for producing albumin?
18.Which amino acid is rapidly transformed into tyrosine in the body?
19.Where does the process of protein synthesis take place in a cell?
20.Which component is found in blood plasma but is missing from serum?