Answer:
E. On in the presence of lactose and absence of glucose
Explanation:
Expression of lac operon synthesizes the enzymes required for catabolism of lactose sugar. When both glucose and lactose are available, glucose is preferred as a nutrient and the lac operon is not expressed.
Lac operon is expressed only when glucose is absent in the medium and lactose is present. If any of the two conditions deviate, the operon is not expressed.
In the absence of glucose and the presence of lactose, the repressor is rendered inactive to bind to the operator. RNA polymerase enzyme is free to bind to the promoter and continue the process of transcription.
The reduced levels of glucose increase the cAMP levels which in turn bind to the Catabolite activator protein (CAP). CAP is a positive regulator that binds to the promoter to facilitate the transcription of the operon by RNA polymerase.
The two sides of the brain contains four lobes each. These lobes are: (1) frontal lobe, (2) parietal lobe, (3) occipital lobe, and (4) temporal lobe. Each of these lobes have their own specific functions. Frontal lobe controls the voluntary movements or activity. Parietal lobe is responsible for information about taste, temperature, touch, and movement. Occipital lobe is responsible for the vision and lastly the temporal lobe is responsible for memories, taste, sight, and touch.
The answer to this item is the temporal lobe.
Answer:
Giving more Attention to bad behavior and bad attitude, when bad behavior is given attention it is a reward as it should not be.
Adaptive immunity is developed after an organism is exposed to a disease. Lymphocytes, who years later respond to repeated exposure to the infection are called;
Lymphocytes are basically classified into two namely, the B and T cells. The B cells give antibody-mediated immunity while the T cells provide cell-mediated immunity.
The memory cytotoxic T lymphocyte is stored as reserve in the body so that in the event of the reoccurrence of a disease, it will resolve itself into the cytotoxic T cell that will fight the disease antigen.
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