4. Explain why your results of the optimal temperature of the lactase enzyme make sense for the human enzyme? Explain the results in terms of the structure and function of proteins5. Propose an appropriate control treatment for the experiment varying temperature, and describe how the control treatment would increase the validity of the results.

Here  is your Answer : )

about 37 °C

The optimum temperature for human lactase is about 37 °C and the optimum pH is 6. In metabolism, the β-glycosidic bond in D-lactose is hydrolyzed to form D-galactose and D-glucose, which can be absorbed through the intestinal walls and into the bloodstream.

Hope it helped you

the answer is sex-linked recessive.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )