Bacterial cells can take up the amino acid tryptophan (Trp) from their surroundings, or, if there is an insufficient external supply, they can synthesize tryptophan from other small molecules. The trp repressor is a bacterial gene regulatory protein that represses the transcription of genes that code for the enzymes required […]

Case : Explain the activation and function of B cells in body defences. What are the mechanisms of antibody actions which support immunity? How does HIV infection impair the body’s ability to produce antibodies? Assignment Structure: The Assignment will have the following sections: Introduction: An introduction should briefly describe the […]

Q1. Mrs. April Masal, a 69-year-old woman, is brought to her doctor by her. Medical history elicits the facts that she lost her husband 6 months previously, has been extremely depressed, and is taking sleeping pills and not eating. What is the possibility of scineal disease? Q2. A black guinea […]

Some of the Drosophila you are working with have miniature wings. Suppose you perform the following three crosses to determine the heritance of the miniature wing phenotype:A. Females from a true-breeding stock of normal winged flies are mated with males from a true-breeding stock of miniature winged flies. All of […]