Promethazine is contraindicated in:                                                        1.   Acute anaphylaxis2.   Treatment of motion sickness3.   Children below 2 years old4.   Angio-oedema5.   In obstetrics for its sedative effects

Inadvertent intravascular administration of a large dose of an amide local anaesthetic can result in:                                                                              1.       Gastritis2.       Hepatic damage3.       Weight loss4.       Renal failure5.       Seizures

The mechanism of action of promethazine is as follows:                   (1)The mechanism of action of promethazine is as follows:1.           Blocks the actions of histamine at H2-receptors2.           Stabilizes mast cells and inhibits the release of allergic mediators 3.           Blocks the actions of histamine at H1-receptors 4.           Activates α-and β-adrenoceptors to produce the opposite effects to histamine5.           Prevents the biphasic reaction in anaphylaxis

The following are classified as β-lactamase sensitive penicillins:    BenzylpenicillinCloxacillinPiperacillinAmpicillinAmoxicillin                    

The following are adverse effects of levothyroxine except:                              1.       Palpitations2.       Weight gain3.        Diarrhoea4.       Tremors5.        Insomnia

Cefazolin:                                                                                                       1.       Is a protein synthesis inhibitor 2.       Is a sulphonamide 3.       Is administered orally 4.       Is used in surgical prophylaxis especially in cardiac & orthopaedic surgery 5.       Is a macrolide

The following are classified as protein synthesis inhibitors except:   1.       Carbapenems2.       Lincosamides3.       Macrolides4.        Tetracyclines5.       Sulphonamides

The following are disadvantages of lidocaine containing  alcohol-based sprays:                                                                          1.        Acute gout2.        Burning sensation3.        Irritation of the mucosa4.        Weight loss5.        Blindness

In gerbils, coat color is controlled by the agouti gene, in which the agouti allele (A) is dominant to the black allele (a). Additionally, coat pattern is controlled by the piebald gene, where the solid allele (S) is dominant to the piebald allele (s). Both genes are located on separate chromosomes. Consider a dihybrid cross between two solid agouti gerbils (AaSs x AaSs). Sort the gerbil phenotypes according to the 9:3:3:1 ratio one would expect to see in the F1 generation.

In a population of rabbits, black fur (B) is dominant over white fur (b). A cross between true-breeding black-furred and white-furred rabbits results in an F1 generation where all offspring have black fur. The F1 rabbits are allowed to mate randomly, producing an F2 generation. In a randomly selected group of 100 rabbits from the F2 generation, you observe 75 black-furred rabbits and 25 white-furred rabbits. What is the observed frequency of the recessive allele in this F2 population? Select the right answer and show your work on your scratch paper for full credit.